Process Control Engineers Passaic Valley Sewerage CommissionProcess Control EngineersNewark, NJ$85,922–$193,004 / yearFull timeThe Process Control Engineer will also be responsible for examining and improving operating policies for specific unit processes and/or operations within the plant, preparing and writing technical research reports and studies, instructing and monitoring operational personnel in order to establish and maintain sampling programs, analyzing both off-site and on-site water and wastewater samples, and maintaining field sampling and monitoring equipment. Additional responsibilities will include developing and maintaining quality controls for daily operational data, drafting and plotting graphs and charts, transitioning analytical and operational data to the process computer, and conducting operator-level research to improve plant performance.
NewManufacturing Engineer Synerfac Technical StaffingManufacturing EngineerPaterson, NJ$72,000–$92,000 / yearA well-established RF and microwave component manufacturer is looking for a Manufacturing Engineer to support production of high-performance components (VCOs, frequency synthesizers, filters, mixers, and couplers) used in defense, communications, and industrial applications. This is a hands-on, floor-facing role: you will work directly with SMT placement equipment and assembly teams, hand-solder prototype and first-article builds, and drive process improvements that keep production running smoothly.
NewSenior Mechanical Engineer Synerfac Technical StaffingSenior Mechanical EngineerWhippany, NJ$160,000–$190,000 / yearOur client is a leading global designer and manufacturer of high-performance lifting and pulling devices for military and civilian aircraft, including rescue hoists, winches, and cargo hooks. This role covers all phases of development, including requirements development, project planning, concept development, detailed design, prototyping, testing, transition to production, and aftermarket support.
NewMechanical Engineer (Data Centers) JobotMechanical Engineer (Data Centers)New York, NY$110,000–$155,000 / yearWe are seeking a Sr Mechanical Design Engineer with 6–10+ years of experience in the design Mission Critical Data Center or Healthcare projects including full-cycle project work, existing conditions assessments, design development, production of construction documents, and construction administration. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
Senior Data Engineer, BI United Nations Federal Credit UnionSenior Data Engineer, BINew York, NY$115,000 / yearFull timeDesign, develop, and optimize complex T-SQL stored procedures, functions, and database objects for high-volume OLTP and Data Warehouse environments, with expertise in transaction isolation levels, table hints, deadlocks, linked servers, OPENQUERY, triggers, and column-level encryption. Develop and implement solutions in Microsoft PowerBI and Microsoft Fabric, including Lakehouse/Warehouse modeling, Dataflows Gen2, Pipelines, and Semantic Models; support the modernization of existing ETL and reporting assets into Fabric and Azure cloud-based frameworks.
NewManufacturing Engineer JobotManufacturing EngineerParsippany, NJ$105,000–$125,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. They are looking to add a Manufacturing Engineer to their team who will assist in the planning and developing of production processes, work instructions, build books, tools, fixtures and equipment necessary to manufacture products.
NewStaff Data Engineer JobotStaff Data EngineerNew York, NY$170,000–$205,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The ideal candidate has deep expertise in ELT development, dimensional modeling, and modern cloud data platforms, with a strong focus on performance, scalability, and data quality.
NewMachine Learning Engineer-Predictive Intelligence JobotMachine Learning Engineer-Predictive IntelligenceNew York, NY$140,000–$180,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The chosen candidate will be a critical player in developing and implementing advanced algorithms, models, and methods that will enable our team to make data-driven decisions and drive our predictive intelligence capabilities.
Industrial Engineer - 3PL Experience JobotIndustrial Engineer - 3PL ExperienceNorth Brunswick Township, NJ$100,000–$125,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Our client, a leading third-party logistics (3PL) provider, is seeking a highly analytical and solutions-oriented Industrial Engineer to support continuous improvement initiatives across their distribution and warehouse operations.
Enterprise Application Engineer Perennial ResourcesEnterprise Application EngineerHackensack, NJFull timeThis role partners closely with business stakeholders to ensure stability, performance, and continuous improvement of enterprise systems. Seeking an Enterprise Application Engineer to support and enhance the firm's critical application ecosystem.
SENIOR INFRASTRUCTURE ENGINEER Staffing Solutions USASENIOR INFRASTRUCTURE ENGINEEREdison, NJ$105,000–$140,000 / yearFull timeLead the architectural design and governance of VMware technologies, including advanced site recovery orchestration (SRM) to ensure business continuity and automated disaster recovery. • Lead cross-functional IT teams and consult with external clients throughout the infrastructure lifecycle, delivering high-level strategic solutions from initial assessment to change implementation.
NewStaff Engineer FBG Enterprises Opco LLCStaff EngineerPECK SLIP, NY$228,900–$248,900 / yearIn lieu of a Bachelor's degree plus 5 years of experience, the employer will accept a Master’s degree or U.S. equivalent in Computer Science, Computer Engineering, or a related field, plus 3 years of professional experience as a Software Engineer, Software Developer, or any occupation, job title, or position conducting code walkthroughs, reviews and collaborating with cross domain stakeholders. MINIMUM REQUIREMENTS: Bachelor’s Degree or U.S. equivalent in Computer Science, Computer Engineering, or a related field, plus 5 years of professional experience as a Software Engineer, Software Developer, or any occupation, job title, or position conducting code walkthroughs, reviews and collaborating with cross domain stakeholders.
NewChief Engineer Johnson Service GroupChief EngineerNew Rochelle, NYThis role oversees engineering planning, constructability, design coordination, technical risk management and value engineering for projects such as highways, bridges, transit systems, utilities, site civil work, and other public infrastructure improvements. The Chief Engineer provides technical and strategic leadership for civil infrastructure projects and supports the safe, compliant, and profitable delivery of work across the organization.
SRE Engineer Pinnacle Technical ResourcesSRE EngineerJersey City,, New Jersey$60–$65 / hourContractorWorking proficiency in a portion of software engineering disciplines and demonstrates understanding of overall software skills including business analysis, development, testing, deployment, maintenance and improvement of software. Familiarity with observability practices such as white and black box monitoring, service level objective alerting, and telemetry collection using tools like Grafana, Dynatrace, Prometheus, Datadog and Splunk.
Data Engineer -601/602 Pinnacle Technical ResourcesData Engineer -601/602Jersey City,, New Jersey$65–$70 / hourContractorThe specific compensation for this position will be determined by a number of factors, including the scope, complexity and location of the role as well as the cost of labor in the market; the skills, education, training, credentials and experience of the candidate; and other conditions of employment. You will develop, test, and maintain essential data pipelines and architectures across diverse technical areas, supporting various business functions to achieve organizational objectives.
Desktop Support Engineer II Pinnacle Technical ResourcesDesktop Support Engineer IINew York, New YorkRemoteContractorThe specific compensation for this position will be determined by several factors, including the scope, complexity, and location of the role, as well as the cost of labor in the market; the skills, education, training, credentials, and experience of the candidate; and other conditions of employment. Successfully placed or hired candidates would only be asked for banking details after accepting an offer from us during our official onboarding processes as part of payroll setup.
NewStaff Engineer - Full Stack / Azure Kforce Inc.Staff Engineer - Full Stack / AzureArmonk, NYRemote$60–$70This role will drive the design and implementation of scalable, secure, and maintainable solutions using modern Microsoft technologies and Azure cloud services while partnering closely with engineering, architecture, UX/UI, and product teams. Summary: We are seeking a highly experienced Staff Engineer to provide technical leadership across full-stack application development, cloud engineering, DevOps, and software quality.
Oracle GoldenGate Engineer - Senior Associate Kforce Inc.Oracle GoldenGate Engineer - Senior AssociateNew York, NYRemote$58This role is responsible for designing, implementing, monitoring, and maintaining Oracle GoldenGate Change Data Capture (CDC) pipelines that enable near real-time movement of critical business data between enterprise systems and operational data platforms. Responsibilities include managing replication processes, supporting upgrades and enhancements, resolving data replication issues, maintaining operational documentation, and contributing to cloud migration and modernization initiatives.
Platform Engineer Kforce Inc.Platform EngineerNew York, NY$45–$55Experience designing highly available, resilient systems and working with microservices, event-driven architectures, and enterprise integrations. Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs.
Ensemble Integration Engineer - Senior Associate Kforce Inc.Ensemble Integration Engineer - Senior AssociateNew York, NYRemote$56They will work closely with data engineering, ETL, and business teams to ensure reliable, secure, and scalable data exchange between healthcare providers, EHRs, laboratories, and enterprise data platforms. This role is responsible for designing, developing, and maintaining clinical integration workflows that process and route real-time and batch healthcare data, including HL7, CCDA, and web service-based integrations.
NewSoftware Engineer II Kforce Inc.Software Engineer IINew York, NY$56–$66.14The ideal candidate reads and digests design documentation quickly, leverages available resources to find solutions independently, effectively utilizes AI coding tools in their development workflow and communicates status and blockers clearly to the team and partners. Design, develop, and maintain full-stack software, including backend services and customer-facing frontend experiences - covering enhancements, bug fixes, and proofs of concept.
Lead iOS Software Engineer Kforce Inc.Lead iOS Software EngineerJersey City, NJ$60–$90Kforce has a client in Jersey City, NJ that is seeking a Lead iOS Software Engineer who will serve as a seasoned member of an agile team to design and deliver trusted market-leading technology products in a secure, stable, and scalable way. Experience using enterprise-authorized AI-assisted development tools within the work environment (e.g., for coding, test creation, troubleshooting, or documentation) with demonstrated ability to critically evaluate, validate, and refine AI-generated outputs for correctness, performance, and security.
OCP Engineer Kforce Inc.OCP EngineerJersey City, NJ$57–$63Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs. By clicking “Apply Today” you agree to receive calls, AI-generated calls, text messages or emails from Kforce and its affiliates, and service providers.
Systems Analyst / Engineer Kforce Inc.Systems Analyst / EngineerManhattan, NY$60–$65Responsibilities: Provides application, network, and systems support for critical banking technologies, including internal networks, servers, security systems, and payment platforms. Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs.
NewOpenShift Engineer Kforce Inc.OpenShift EngineerArmonk, NYRemote$80–$90Overview: We are seeking an experienced OpenShift Engineer to support the installation, configuration, administration, and maintenance of enterprise Red Hat OpenShift environments hosted on Microsoft Azure. Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs.
Principal Software Engineer - Growth (CoreAI) MicrosoftPrincipal Software Engineer - Growth (CoreAI)New York, NY$165,600–$296,400 / yearAt this level, impact comes from building repeatable systems and raising the engineering bar: better experiment quality, better telemetry, safer rollouts, and clearer business outcomes — delivered through pragmatic execution and deep technical judgment. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $220,800 - $331,200 per year.
NewSoftware Engineer IV Kforce Inc.Software Engineer IVNew York, NY$44–$51Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs. By clicking “Apply Today” you agree to receive calls, AI-generated calls, text messages or emails from Kforce and its affiliates, and service providers.
NewStaff Software Engineer (Low Latency Trading) Kforce Inc.Staff Software Engineer (Low Latency Trading)Jersey City, NJ$300,000–$350,000Kforce has a client in Jersey City, NJ that is seeking a Staff Software Engineer (Low Latency Trading) to play a key role in the architecture, design and development of a next-generation global electronic trading platform. The Staff Software Engineer will build scalable, high-performance systems that support algorithmic trading, smart order routing (SOR), and real-time market data processing.
Senior Software Engineer MicrosoftSenior Software EngineerNew York, NY$119,800–$234,700 / yearMasters Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $160,200 - $261,000 per year.
Specialty Software Engineer 3 - Contingent Pinnacle Technical ResourcesSpecialty Software Engineer 3 - ContingentIselin,, New JerseyContractorWe are seeking a Lead Protocol Engineer to help build a cutting-edge Digital Asset Platform focused on solving one of the biggest challenges in institutional finance—delivering regulatory compliance while preserving transaction confidentiality. This role sits at the intersection of cryptography, blockchain infrastructure, and high-performance distributed systems, offering the opportunity to design and develop core protocol components from the ground up.
NewStaff Software Engineer, Bi Tooling and Platform Attentive Mobile, Inc.Staff Software Engineer, Bi Tooling and PlatformPECK SLIP, NYRemote$193,461–$240,000 / yearMust also have experience in the following: 7 years of professional experience developing backend software systems using object-oriented programming principles and Java in production environments; 7 years of professional experience working with relational and non-relational databases and distributed systems, including data storage, streaming, and processing technologies; 7 years of professional experience architecting, implementing, and supporting high-scale, high availability applications supporting metrics, analytics, or data intensive workloads; 7 years of professional experience developing data processing and platform solutions utilizing Python, SQL, and cloud-based data tools including Snowflake, DBT, Spark, Kinesis, Airflow, or PostgreSQL; 7 years of professional experience developing and supporting AWS-based microservices and data pipelines supporting analytics platforms and operational reporting systems; 7 years of professional experience implementing streaming or messaging architectures using event-driven platforms including Kafka or Pulsar; 5 years of professional experience designing and maintaining business intelligence and data visualization workflows; 5 years of professional experience collaborating with cross functional stakeholders to translate business requirements into technical architecture, data pipelines, and application features; and 4 years of professional experience designing and implementing microservices-based architectures and developing, GraphQL services and RESTful APIs for largescale, data-driven applications. Design, develop, and maintain software components that support the internal business intelligence tooling and platform used to generate and retrieve operational metrics; implement testing strategies to prevent regressions and ensure accuracy, stability, and long term maintainability of the applications supporting metric delivery; enhance code quality and system reliability through ongoing improvements, refactoring, and technical contributions that strengthen the architecture and performance of BI tooling; build and optimize user facing and internal platform features with attention to scalability, performance, fault tolerance, and efficient data access; translate business requirements into detailed technical plans by working closely with product teams, internal users, and subject matter experts to ensure alignment with operational needs; and provide technical guidance to less experienced engineers and support their development through review of code, design discussions, and knowledge sharing.
DevOps Engineer Genesis10DevOps EngineerNew York, NYRemote$70–$90 / hourTemporaryContractorFull timeThis role requires far more than GitLab source control experience—you will own automated software delivery pipelines, implement governance and security best practices, and enable reliable deployments across multiple application stacks and cloud environments. Candidates should understand the unique CI/CD requirements of each platform, including dependency management, build optimization, testing frameworks, artifact creation, security scanning, containerization, and deployment strategies.
NewSenior Cloud Engineer, Databricks Platform - Hybrid or Remote Genesis10Senior Cloud Engineer, Databricks Platform - Hybrid or RemoteWarren, NJRemote$75–$85 / hourTemporaryContractorFull timeAI/ML Platform Infrastructure: Provision and operate the infrastructure supporting machine learning workloads: Azure ML workspaces and compute clusters, GPU quota and capacity planning, MLflow model registry integration, model serving endpoints, and the identity and networking connecting them to Unity Catalog. Network & Security Architecture: Design and implement the private networking and security posture for the platform — private endpoints, hub-and-spoke topology, VNet injection, NSGs and firewall rules, managed identities, Key Vault-backed secret scopes, RBAC, and data exfiltration controls.
NewSr Video Streaming Engineer (Android) STAND 8Sr Video Streaming Engineer (Android)New York, NYRemote$70–$80 / hourFull timeStand8 provides end to end IT solutions to enterprise partners across the United States and with offices in Los Angeles, New York, New Jersey, Atlanta, and more including internationally in Mexico and India. The engineer will translate analytics requirements into production code, connect playback and user experiences to structured event data, and create reusable instrumentation and validation patterns across Android devices.
Lead Systems Engineer (HPC) Princeton UniversityLead Systems Engineer (HPC)Princeton, NJThe Lead Systems Engineer for High Performance Computing (HPC) and Artificial Intelligence (AI) works as part of the Advanced Systems team within Research Computing that supports the hardware and system-level software on the University's centralized high-performance computing and other computing for research systems. The Lead Systems Engineer is responsible for engaging with faculty, researchers, vendors, and other information technology (IT) staff to specify, design, install, and administer computing for research systems while also providing insight into trends and technologies supporting the advancement of AI research.
NewSenior Highway Engineer HARDESTY & HANOVERSenior Highway EngineerMorristown, NJThe successful candidate will support complex transportation projects involving geometric design, grading, drainage, construction staging, maintenance, and protection of traffic, access design, and right-of-way coordination. Position Title: Senior Highway Engineer Location: Morristown, New Jersey, United States Description: H&H is seeking a Senior Highway Engineer to join the firm's New Jersey Regional Operation.
Cloud HPC Engineer AxelonCloud HPC EngineerJersey City, NJ$84–$89 / hourPrior experience in a similar role within the financial industry (e.g., running large-scale Monte Carlo simulations, VaR calculations, or XVA pricing grids) is highly desirable. Architect, build, and manage a massive-scale, distributed compute grid on public cloud platforms (AWS, GCP) for running financial pricing models.
NewForward Deployed Engineer JobotForward Deployed EngineerNew York, NY$160,000–$300,000 / yearOur client is a leading data analytics and technology consulting firm that partners with private equity firms and their portfolio companies to solve complex business challenges through AI, advanced analytics, and modern data engineering. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewPre-Sales Application Engineer – Robotics & Automation JobotPre-Sales Application Engineer – Robotics & AutomationNew York, NY$60–$80 / hourInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This individual will support regional sales professionals and channel partners by designing and delivering demonstrations, proof-of-concept programs, technical evaluations, installations, and training.
Principal Software Engineer- Private Equity JobotPrincipal Software Engineer- Private EquityNew York, NY$200,000–$375,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We specialize in identifying unique market opportunities, acquiring high-potential businesses, and partnering closely with management teams to drive operational excellence.
Software Engineer Finch LegalSoftware EngineerNew York, NY$180,000–$280,000 / yearFull timeRequires a Bachelor's degree or foreign equivalent in Computer Science or related field, and at least two years of experience as a Software Engineer or related occupation. Please send C.V. to Ben Weems admin@finchlegal.com.
NewWindows Systems Engineer Page GroupWindows Systems EngineerNew York, NY$200,000–$250,000 / yearFull timeAs a Windows Systems Engineer, you will play a key role in maintaining and optimizing the technology infrastructure for a retail-focused organization. The company is known for its focus on leveraging advanced technology to enhance operational efficiency and deliver exceptional value to its customers.
Data Engineer Page GroupData EngineerNew York, NY$115,000–$135,000 / yearFull timeDesign, build, and maintain scalable batch data pipelines, transformation workflows, dimensional models, and curated analytical data models using SQL, Python, Databricks, Apache Spark/PySpark, and distributed data processing technologies. The Data Engineer will play a key role in designing, building, and maintainig scalable data pipelines, curated analytical data models, and cloud-based data products that support enterprise supply chain analytics and operations.
NewSenior Software AI Engineer Page GroupSenior Software AI EngineerNew York, NY$175,000–$220,000 / yearFull timeThe Senior Software AI Engineer will play a critical role in developing advanced AI-driven solutions to enhance operational efficiency and decision-making processes within the insurance industry. A successful Senior Software AI Engineer should have: Strong expertise in artificial intelligence and machine learning techniques.
Service Engineer - NJ Michael Page USAService Engineer - NJAllendale, NJ$75,000–$85,000 / yearFull timeMy client is seeking a highly motivated and technically skilled CNC Service Engineer to provide onsite installation, maintenance, troubleshooting, and repair support for advanced CNC machine tools within a designated local service territory. This organization is a leading provider of advanced CNC machine tool solutions, specializing in precision turning technologies that support manufacturers across a wide range of industries, including medical, aerospace, automotive, defense, electronics, and general industrial machining.
Project Engineer Page GroupProject EngineerMorristown, NJ$90,000–$110,000 / yearFull timeSince 1990, the company has specialized in water and sewer infrastructure, utility construction, trenchless technology, emergency services, bridge work, and site development projects for municipalities, utility authorities, and private clients throughout New Jersey, New York, and Pennsylvania. The Project Engineer will work closely with Project Managers, Superintendents, clients, subcontractors, and field personnel to ensure projects are completed safely, on schedule, within budget, and in accordance with contract requirements.
NewJava/AI Software Engineer Page GroupJava/AI Software EngineerIselin, NJ$130,000–$150,000 / yearFull timeCore Java Tech Stack: Java, Spring Framework, JDBC/JPA (Hibernate), SQL, IBM DB2/Oracle, IBM MQ/JMS messaging, multithreading, XML/JSON processing, JUnit/TestNG, secure coding, and enterprise application development in distributed systems environments. The Java/AI Software Engineer will focus on designing and developing innovative software solutions, leveraging Java and AI technologies, to support the technology needs of the financial services industry.
Electrical Performance Engineer Nexamp IncElectrical Performance EngineerNew York, NY$125,000–$135,000 / yearWhat you'll do: Own plant protection, controls, and compliance strategy by reviewing and coordinating protection settings across OCPDs, relays, inverters, and plant controllers; managing required setting changes with third-party vendors; and securing utility approvals to ensure safe, reliable operation. Lead data-driven reliability and loss reduction efforts by analyzing inverter logs, relay events, EMS dispatch data, and waveform captures; conducting root-cause and 8D investigations; quantifying production and financial impacts; and recommending corrective actions, upgrades, or repowering strategies.
Performance Engineer - AI Systems MercorPerformance Engineer - AI SystemsNew York, New YorkRemote$70–$110 / hourGuide research and engineering teams to close knowledge gaps and improve AI model performance in systems-level optimization, compiler engineering, and runtime performance topics. Demonstrable track record of measurable performance improvements on production systems (e.g., latency reduction, throughput gains, memory footprint optimization).
Performance Engineer PDT PartnersPerformance EngineerNew York, NY$195,000–$225,000 / yearHardware-software interface: Deep understanding of CPU microarchitecture, cache hierarchies, memory subsystems, hardware performance counters, and how software behavior maps to hardware reality. Systems-level optimization: Experience tuning system and application performance via sysctls, scheduler policies, NUMA topology awareness, memory allocators, network tunables, and storage I/O configuration.