Full Stack Developer AxelonFull Stack DeveloperRutherford, NJ$74–$78 / hourMinimum 3 years of expertise in application design and development using technologies and frameworks such as Spring, Spring Boot, Java, Hibernate. Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding the company, its clients, and assets.
Front-End Developer (Angular/Javascript) AxelonFront-End Developer (Angular/Javascript)RUTHERFORD, NJ$67–$71 / hourAppropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Banking, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency. 3-5 years of expertise in application design and development using the below mentioned technologies and frameworks: Back-end: Spring, Spring boot, Java, Hibernate, Design patterns: Microservices, Docker, Kubernetes, etc.
Senior Analytics Developer NewYork-PresbyterianSenior Analytics DeveloperNew York, NY$85,500–$139,000 / yearAs a Senior Analytics Developer on the Data Shared Services (DSS) team, you will partner with clinical, business, and quality leaders to deliver governed data products and decision support that improve access, quality, equity, and operational performance across our hospitals and affiliated medical schools. Bachelor's degree in a quantitative field (e.g., Biomedical Informatics, Epidemiology, Computer Science, Data Science, Public Health, Economics, Biostatistics, Health Policy, Statistics, Biometrics) or equivalent experience.
Software Developer 2 Oracle CorpSoftware Developer 2NY$68,500–$158,200 / yearOracle maintains broad salary ranges for its roles in order to account for variations in knowledge, skills, experience, market conditions and locations, as well as reflect Oracle''s differing products, industries and lines of business. You'll be responsible and lead efforts in designing and building scalable, distributed, and resilient software components and services to support health care platform, applications, and our end users.
Senior Analytics Developer NYPSenior Analytics DeveloperNew York, NY$85,500–$139,000 / yearAs a Senior Analytics Developer on the Data Shared Services (DSS) team, you will partner with clinical, business, and quality leaders to deliver governed data products and decision support that improve access, quality, equity, and operational performance across our hospitals and affiliated medical schools. Bachelor’s degree in a quantitative field (e.g., Biomedical Informatics, Epidemiology, Computer Science, Data Science, Public Health, Economics, Biostatistics, Health Policy, Statistics, Biometrics) or equivalent experience.
VP, Quant Developer - Risk Analytics Jefferies Financial Group IncVP, Quant Developer - Risk AnalyticsJersey City, NJ$175,000–$200,000 / yearThe ideal candidate brings equal depth in Agentic Coding and financial risk domain knowledge, with hands-on experience structuring agentic workflows, validating AI-generated output, and architecting end-to-end systems in environments similar to Claude Code. This role offers the opportunity to work closely with other risk analytics teams, including Market Risk, Credit Risk, and RegIM, to design and operate AI-powered systems that automate complex risk workflows and support regulatory submissions.
Senior Engineering Manager, Developer Productivity MongoDB IncSenior Engineering Manager, Developer ProductivityNY$151,000–$297,000 / yearThe AXIS team (AI, X-functional tools, Insights, and Signals) sits within Developer Productivity and is responsible for overseeing the metrics and observability infrastructure of our expansive developer environment to help build a strong data-driven culture. 8+ years of hands-on software engineering experience building and operating production systems; experience in developer tooling, platform engineering, observability, or data engineering is a strong plus.
Senior Software Developer - Healthcare Analytics & AI Oracle CorpSenior Software Developer - Healthcare Analytics & AINY$79,200–$209,500 / yearOracle maintains broad salary ranges for its roles in order to account for variations in knowledge, skills, experience, market conditions and locations, as well as reflect Oracle''s differing products, industries and lines of business. As a member of the software engineering division, you will assist in defining and developing software for tasks associated with the developing, debugging or designing of software applications or operating systems.
VP, Senior Developer - Liquidity Risk Jefferies Financial Group IncVP, Senior Developer - Liquidity RiskNew York, NY$175,000–$225,000 / yearWhat You'll Deliver: You will lead and implement technology initiatives that support Liquidity Risk Management capabilities such as cash positioning, funding and maturity profiles, collateral/margin impacts, liquidity metrics, stress testing/scenario outputs, limits/threshold monitoring, and internal/regulatory-oriented reporting, with strong data lineage, controls, and auditability. Define and implement mappings and controls from upstream sources (e.g., Treasury platforms, GL/subledger, payments, collateral/margin systems, market/security master where needed) to downstream consumers (liquidity risk engines, stress pipelines, dashboards, internal reporting).
VP, KDB Developer (Real Time Analytics) Jefferies Financial Group IncVP, KDB Developer (Real Time Analytics)New York, NY$185,000–$225,000 / yearThis role focuses on developing and maintaining low-latency data infrastructure, processing real-time ticker data alongside large-scale historical datasets, and delivering high-performance analytics solutions used by trading, quantitative, and risk teams. The Equities Data & Analytics Team is seeking an experienced Kdb+/Q Engineer to design, build, and enhance real-time analytics platforms supporting electronic trading and market data workflows.
Senior Developer - Front Office Nomura Holdings IncSenior Developer - Front OfficeNew York, NY$225,000–$250,000 / yearNomuras Global Markets department provides liquidity, market insights, and execution services to clients worldwide across various asset classes, including equities, fixed income, currencies, and commodities. By connecting markets East & West, Nomura services the needs of individuals, institutions, corporates and governments through its three business divisions: Wealth Management, Investment Management, and Wholesale (Global Markets and Investment Banking).
NewSenior Software Engineer, Developer Experience Voleon Capital Management LpSenior Software Engineer, Developer ExperienceNew York City, NY$7,500–$15,000 / yearOur team includes experienced engineers from leading technology companies and top academic programs, building the high-leverage tooling that the rest of the firms engineers rely on every day. As a Senior Software Engineer on the Developer Experience (DevEx) team within Software Platform, you will design and evolve the core development platform that enables engineers to build, test, deploy, and maintain software quickly and reliably across the company.
C13 Senior Python Backend Developers BC ForwardC13 Senior Python Backend DevelopersRutherford, NJ$90.57 / hourFull timeJob Title: C13 Senior Python Backend DevelopersLocation: Rutherford, NJDuration: Temp to Hire - 6 monthsJob ID: 406502About TSRTSR is a trusted staffing and workforce solutions partner with more than 50 years of experience delivery highly qualified talent to support clients' most critical business and technology initiatives. Requirements Job Title: C13 Senior Python Backend Developers Location: Rutherford, NJ Duration: Temp to Hire - 6 months Job ID: 406502 About TSR TSR is a trusted staffing and workforce solutions partner with more than 50 years of experience delivery highly qualified talent to support clients' most critical business and technology initiatives.
Application Developer / Report Writer RBC Bearings IncApplication Developer / Report WriterCTFounded in 1919, the Company is primarily focused on producing highly technical and/or regulated bearing products and components requiring sophisticated design, testing and manufacturing capabilities for the diversified industrial, aerospace and defense markets. RBC Bearings Incorporated (NYSE: RBC) is a leading international manufacturer of highly engineered precision bearings, components and essential systems for the industrial, defense and aerospace industries.
Tableau Developer Michael Kors (UK) LtdTableau DeveloperEast Rutherford, NJ$90,000–$110,000 / yearThe role will follow Tableau best practices for visualization design, naming conventions, and documentation while also maintaining version control and promoting content across environments (Dev / Test / Prod) On Tableau Cloud. This role partners business stakeholders, data engineers, and analysts to translate complex data into intuitive visual insights while ensuring performance, data accuracy, and best visualization practices.
Web Developer, Contract PRIVATE TECH INCWeb Developer, ContractNew York, NY$100–$200 / hourExperience with marketing analytics tools like Mixpanel, Google Ads, Meta, and demonstrated ability to implement web analytics beyond out-of-the-box implementations, such as the ability to set up custom event tracking, conversion tracking, and server-side data collection in a way that prioritizes user privacy and minimizes unnecessary third-party data exposure. Our journey began when our founder recognized a critical vulnerability in our modern world: everyone relies on the same stagnant cellular infrastructure and legacy systems that track our every movement, monitor and profile our connections, and lose and sell our personal data.
Senior Associate - Full Stack Developer - Wealth Management Technology New York Life Insurance CoSenior Associate - Full Stack Developer - Wealth Management TechnologyNew York, NY$100,000–$143,000 / yearWork with integration technologies and patterns including MuleSoft, API gateways, event-driven messaging, batch and real-time data movement, file-based integrations, and third-party vendor APIs. Strong understanding of enterprise integration architecture, including API-led connectivity, vendor APIs, data transformation, event-driven integration, batch processing, and error/retry handling.
Lead Full Stack Developer with Code Modernization & GitHub Copilot - 100% Remote The Dignify Solutions, LLCLead Full Stack Developer with Code Modernization & GitHub Copilot - 100% RemoteJersey City, NJRemoteThe candidate will be responsible for modernizing legacy applications, driving engineering best practices, leveraging Al-powered development tools to improve productivity, and leading end-to- end full-stack development efforts. The ideal candidate should have strong expertise in Code Modernization, Al-assisted development tools such as GitHub Copilot, and experience leading development teams through large-scale digital transformation initiatives.
Associate - Full Stack Developer New York Life Insurance CoAssociate - Full Stack DeveloperNew York, NY$66,500–$95,500 / yearOur diverse business portfolio creates opportunities to make a difference across industries and communities-inviting bold thinking, collaborative problem-solving, and purpose-driven innovation. By embracing a broad range of perspectives and experiences, we achieve greater success and fulfill our promise of providing financial security and peace of mind to families across all communities.
Principal Software Engineer - Frontend, Developer Experience Palo Alto Networks IncPrincipal Software Engineer - Frontend, Developer ExperienceBridgeport, CTYou will collaborate directly with Product, Design, and engineering peers to build interfaces that help developers navigate complex environments with petabytes of telemetry data, turning that data into actionable, easy-to-understand visualizations and workflows. For candidates who receive an offer at the posted level, the starting base salary (for non-sales roles) or base salary + commission target (for sales/com-missioned roles) is expected to be the annual range listed below.
Senior Software Engineer II, Developer Experience Carta IncSenior Software Engineer II, Developer ExperienceNew York, NY$212,500–$250,000 / yearTech Stack: Python or Java; CI/CD tooling (CircleCI, GitHub Actions, ArgoCD, Jenkins, Docker); cloud-native (AWS, Terraform, Kubernetes); familiarity with secrets management tooling (Vault, Cloudsmith) is a plus. Carta's software for the Office of the Fund CFO does just that - it's a new category of software to make private markets look more like public markets - a connected ERP for private capital.
Full Stack Software Developer Capital Rx, Inc.Full Stack Software DeveloperNew York, NY$108,800–$136,000 / yearBy delivering true price transparency, eliminating unnecessary middleman fees, and leveraging advanced AI-powered care delivery, Judi Health helps clients achieve unprecedented operational efficiency and service levels. We're looking for someone who brings a mix of technical expertise, problem-solving ability, and collaborative spirit: Collaborate with senior developers to implement new features and improve existing functionality.
New York Botanical Garden Careers - Full-Stack Geospatial Developer New York Botanical GardenNew York Botanical Garden Careers - Full-Stack Geospatial DeveloperBronx, NY$130,000–$144,000 / yearSuch assets include location-specific visualizations of the historical landscape condition; distribution maps of species, ecosystems, and abiotic factors; georeferenced historical maps from the 17C - 20C; "Muir web" based network analysis of ecological interconnections; the distributions of Indigenous peoples and their use of fire to manage the landscape; a database of historical placenames; a library of georeferenced historical maps; associated bibliographies, documents, papers and analyses. Position Summary: The Full-Stack Geospatial Developer analyzes data, develops new approaches, and maintains NYBG 's urban conservation suite of digital platforms and tools for science communication, including applications in exhibitions; on mobile devices; and on the web.
AI Engineer/ML Engineer - Senior Developers - AI Training - USA Prolific Academic LtdAI Engineer/ML Engineer - Senior Developers - AI Training - USANew York, NYWe've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high-quality, ethically sourced human behavioural data and feedback. We're looking for AI and Machine Learning Engineers to join our Expert Network to help train and evaluate the next generation of LLMs using deep technical expertise.
NewInstructional Designer/Learning Developer - Acute and Ambulatory Nursing Oracle CorpInstructional Designer/Learning Developer - Acute and Ambulatory NursingNY$71,200–$166,100 / yearAt least 5 years additional work experience directly related to the duties of the job and/or completed higher education, including: Bachelor''s degree in business, Communications, Education, Health Care, Instructional Design, Marketing, or related field, or equivalent relevant work experience. 6+ years total combined related work experience and completed higher education, including: At least 1-year learning/adult education work experience, including instructional design, training facilitation and/or learning consultation.
Sr Lead Application Developer Teachers Insurance and Annuity Association of America (TIAA)Sr Lead Application DeveloperNew York, NY$128,000–$174,000 / yearAgile Methodology, Continuous Integration and Deployment, Data Analysis, Debugging, DevOps, Enterprise Application Integration, Operating Systems Management, Problem Solving, Programming, Software Development, Software Development Life Cycle, Web Application Development. Cloud Native Application Architecture: AWS PaaS/SaaS services, Server less architecture, Lambda, API Gateway, Lightweight architectures including JavaScript frameworks (AngularJS/React) and single page web applications.
Business Rules Developer, Industry Management Amtrust Financial Services IncBusiness Rules Developer, Industry ManagementNY$87,600–$145,000 / yearCollaborate closely within Product Management and with key partners in Product Systems, Product Strategy and IT in the formulation and implementation of key business and automation solutions, supporting profit and growth strategies for AmTrust's Small Commercial multi-line portfolio. Salaries are based upon a wide range of factors considered in making the compensation decision, including, but not limited to, candidate skills, experience, education and training, the scope and responsibilities of the role, as well as market and business considerations.
Lead AS400 Developer with Synon experience Tech Mahindra LtdLead AS400 Developer with Synon experienceNYRemoteProficiency in all phases of the Software Development Life Cycle (SDLC) and adept at problem determination and resolution through research and fact-finding. Tech Mahindra also offers benefits like medical, vision, dental, life, disability insurance and paid time off (including holidays, parental leave, and sick leave, as required by law).
Software Developer 3 Oracle CorpSoftware Developer 3NY$89,200–$209,500 / yearOracle maintains broad salary ranges for its roles in order to account for variations in knowledge, skills, experience, market conditions and locations, as well as reflect Oracle''s differing products, industries and lines of business. As a member of the software engineering division, you will assist in defining and developing software for tasks associated with the developing, debugging or designing of software applications or operating systems.
VP, ServiceNow ITOM Developer Jefferies Financial Group IncVP, ServiceNow ITOM DeveloperJersey City, NJ$160,000–$185,000 / yearArchitect platform integrations and middleware solutions using Service Graph Connectors, IntegrationHub, Flow Designer, and REST APIs to onboard external data sources (security tools, cloud inventories, monitoring systems, and enterprise applications) that enrich CMDB coverage. Lead CMDB maturity assessments and large-scale data integrity remediation programs spanning millions of configuration items across hybrid on-premises infrastructure (Windows/Linux servers, network devices, cloud).
Oracle APEX PL-SQL Core Formula Developer ManTech International CorpOracle APEX PL-SQL Core Formula DeveloperNY$163,100–$289,400 / yearThere are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. Programming specific Oracle Fast Formulas and mathematical expressions required to calculate employee benefit deductions, complex tax withholdings, or granular financial allocations.
Java Python Agentic AI Developer Kforce Inc.Java Python Agentic AI DeveloperJersey City, NJ$65–$100Summary: As an Agentic AI Software Engineer, you will design and build critical technology solutions across Chase AI components, including Company Agent, Agent Operating Memory, Domain Agents, Agentic Experience Service, and Assurance. Applies knowledge of tools within the Software Development Life Cycle toolchain, including enterprise-authorized AI-assisted development and automation capabilities, to improve the value realized by automation.
Oracle Software Developer ManTech International CorpOracle Software DeveloperNY$89,100–$148,200 / yearThere are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.
Principal Software Developer - Oracle Health, Backend Focus Oracle CorpPrincipal Software Developer - Oracle Health, Backend FocusNY$99,600–$234,600 / yearOracle maintains broad salary ranges for its roles in order to account for variations in knowledge, skills, experience, market conditions and locations, as well as reflect Oracle''s differing products, industries and lines of business. We are seeking a Principal Software Developer (IC4) to lead design and delivery for complex platform capabilities, improve platform reliability and security posture, and mentor engineers through deep technical contributions and influence.
Principal Software Developer - Oracle Health, AI Platform Engineering Oracle CorpPrincipal Software Developer - Oracle Health, AI Platform EngineeringNY$99,600–$234,600 / yearOracle maintains broad salary ranges for its roles in order to account for variations in knowledge, skills, experience, market conditions and locations, as well as reflect Oracle''s differing products, industries and lines of business. We are seeking a Principal Software Developer (IC4) to lead design and delivery for complex platform capabilities, improve platform reliability and security posture, and mentor engineers through deep technical contributions and influence.
Senior Product Director - Aladdin Studio Developer BlackRockSenior Product Director - Aladdin Studio DeveloperNew York, New YorkTo help you stay energized, engaged and inspired, we offer a wide range of benefits including a strong retirement plan, tuition reimbursement, comprehensive healthcare, support for working parents and Flexible Time Off (FTO) so you can relax, recharge and be there for the people you care about. Sitting at the intersection of business and technology, the Aladdin Product Management team partners closely with engineering, research, and client-facing teams to design and deliver products that shape financial markets.
Fullstack Developer Hudson River TradingFullstack DeveloperNew York, NY$175,000–$250,000 / yearWork closely with a variety of senior technical and non-technical users and own projects end-to-end, from inception to gathering and refining requirements, forming and executing a structured plan, and managing ongoing support and iterations to the initial plan. Fullstack Developers at HRT work either on our platform team (i.e. you work on infrastructure & tooling that supports all of our research & trading capabilities) or our acceleration team (i.e. you are aligned with a specific algo research & trading team).
C++ Developer Phaxis LLCC++ DeveloperNew York, NY$135,000–$175,000 / yearContribute to modern engineering processes including CI/CD pipelines, code reviews, Agile delivery, bug tracking tools such as Jira, and secure coding practices. Partner with QA and cross-functional teams to maintain high software quality through testing, automation, and continuous improvement practices.
Senior CPQ/RCA Developer Kforce Inc.Senior CPQ/RCA DeveloperNew York, NYRemote$60–$70Employee 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.
Senior Oracle PL/SQL Developer BC ForwardSenior Oracle PL/SQL DeveloperJersey City, NJ$68–$68.25 / hourFull timeThe ideal candidate will have strong experience in Oracle PL/SQL, database performance tuning, and object-oriented design and a proven ability to deliver enhancements, troubleshoot production components, and collaborate across teams to meet business requirements . With delivery centers and offices across North America and India, we take pride in building long-term relationships and delivering excellence through innovation, collaboration, and integrity.
Lead Salesforce Developer – Agentforce & AI Solutions 3646041 Axiom PathLead Salesforce Developer – Agentforce & AI Solutions 3646041Hauppauge, New YorkDirect experience designing, configuring, developing, testing, integrating, or deploying Salesforce Agentforce, Einstein AI, generative AI, or comparable Salesforce AI functionality. The Salesforce organization is focused on modernizing its CRM ecosystem, improving system scalability, and deploying practical artificial intelligence solutions that deliver measurable business value.
Sr. KDB+ Developer InterSources Inc.Sr. KDB+ DeveloperJersey City, NJInterSources Inc , is a Small, Woman, and Minority-Owned Business Enterprise, ISO/IEC 27001, SOC 2 Type 2 certified company with massive 18+ years of diversified experience in providing IT Consulting Services, Artificial Intelligence, Data Analysis, Application Development, Cloud Services, Cybersecurity, Digital Marketing, ERP Management, Custom Software Development, Web Development, UI/ UX Design, System Integration, QA Support etc. You will be collaborating with the regulatory reporting business team and other brokerage technology teams to develop applications for reporting across multiple asset classes with very high levels of regulatory scrutiny.
AI Developer - Full Stack APN consulting GroupAI Developer - Full StackJersey City, New JerseyContractorStrong understanding of modern SDLC practices (Agile, DevOps, CI/CD).3 days per week in-office across NJ (Summit) and NYC (Midtown).Preferred QualificationsExperience with AI SDLC frameworks (e.g., BMAD or equivalent).Exposure to prompt-driven development and automated code generation workflows. Role: Full Stack Software Developer (.NET & React, AI-Enabled SDLC)Location: Onsite (NJ, NYC), USADuration: ContractOverviewWe are seeking a highly capable Full Stack Software Developer with strong expertise in.
Developer Advocate Metabase IncDeveloper AdvocateNY$135,000–$190,000 / yearCreate content that developers and analysts actually want: practical tutorials, clear explanations, honest opinions, and demos grounded in real use cases as blog posts, videos, talks, and whatever formats fit the moment. Represent the community''s needs internally - synthesizing feedback and sharing learnings with engineering, product, and marketing teams in a way that''s actionable, not just anecdotal.
Senior Java FullStack Developer ICONMA, LLCSenior Java FullStack DeveloperNew York, NY$16.50–$53.57 / hourOur Client, an IT Services and Consultant company, is looking for a Senior Java FullStack Developer for their New York, NY location. Build, enhance, and maintain RESTful APIs and microservices using Spring Boot 3.3.x.
Full Stack Developer Java, Spring Boot & Angular ICONMA, LLCFull Stack Developer Java, Spring Boot & AngularNew York City, CA$16.50–$53.57 / hourOur Client, an IT Services and Consultant company, is looking for a Full Stack Developer – Java, Spring Boot & Angular for their New York City, NY location. Build, enhance, and maintain RESTful APIs and microservices using Spring Boot 3.3.x.
NewSAP ABAP Developer ECLAROSAP ABAP DeveloperWHITE PLAINS, NY$65–$75 / hourPerform end to end development activities - Building prototypes, Effort estimation, Writing Technical design, Development, Unit Testing, Code Review, Production support, UAT/System/Integration testing support, Deployment. At least 5 years of experience in SAP ABAP with focus on HR - Workflows, Reports, Dialog Programming, Interfaces, Smart Forms, Scripts, Adobe Forms, Web Dynpro, Enhancement Framework.
Senior Product Manager - Aladdin Studio Developer, DIR BlackRock IncSenior Product Manager - Aladdin Studio Developer, DIRNew York, NY$215,000–$275,000 / yearTo help you stay energized, engaged and inspired, we offer a wide range of benefits including a strong retirement plan, tuition reimbursement, comprehensive healthcare, support for working parents and Flexible Time Off (FTO) so you can relax, recharge and be there for the people you care about. About the Role: As a Director on the Studio Developer team, you will operate as an enterprise leader responsible for setting product strategy, driving cross-platform outcomes, and ensuring delivery at scale.
IBM Maximo Developer # 26-14884 US Tech Solutions, Inc.IBM Maximo Developer # 26-14884White plains- Westchester, NY$70 / hourDemonstrated understanding of Active directory / DNS; User and User Rights management / File System Rights (NTFS Permissions); security configuration and implementation; group policy management; and backup systems/ data backup management. The role works closely with subject matter experts within IT and key stakeholders from multiple business areas providing expert Maximo functional and technical guidance.
Quant Developer — Full-time Anthelion CapitalQuant Developer — Full-timeNew York City, New YorkNice to have: Dagster/Prefect, Azure, model-registry or feature-store experience, prior work at a quant/trading firm or a serious data platform, hands-on risk-modeling or portfolio-construction experience. You'll build and own the infrastructure our researchers and PMs depend on — the shared data layer, the backtester, the deployment path, and the monitoring that keeps live models honest.