Sr. Full Stack Developer

We align strategy with execution and provide secure service solutions by developing and using the latest technologies that thrive our resources to deliver industry-leading capabilities to our clients and customers, making it convenient for our clients to do business with InterSources Inc. We provide strategic and technical advice, and we have expertise in areas covering Artificial Intelligence, Cloud Migration, Custom Software Development, Data Analytics Infrastructure & Cloud Solutions, Cyber Security Services, etc.

Role: Sr. Full Stack Developer (813139)
Work Location: Onsite Harrisburg, PA
Work Arrangement: 100% Onsite (Mandatory)
Pay Rate: $75/hr on W2
We are seeking a highly experienced, hands-on Senior FullStack Developer with 10+ years of software development experience to design, develop, integrate, and maintain scalable, secure, high-performance enterprise applications.
The ideal candidate will possess deep expertise in modern front-end and back-end technologies, cloud-native architecture, API development, database management, and enterprise systems integration. The candidate must also demonstrate practical experience leveraging AI-powered development tools, Generative AI, and intelligent automation to improve software engineering productivity, code quality, testing, and application capabilities.
This is a 100% onsite position, requiring close collaboration with enterprise application teams, business stakeholders, architects, and IT leadership.
Key Responsibilities
1. Full Stack Application Development

• Design, develop, test, deploy, and maintain enterprise-grade web applications.
• Build responsive, scalable, and accessible user interfaces using modern JavaScript frameworks such as React, Angular, or Vue.js.
• Develop robust back-end services using technologies such as .NET/C#, Node.js
• Design and implement RESTful APIs, microservices, and event-driven integrations.
• Apply object-oriented programming, design patterns, SOLID principles, and clean architecture.
• Modernize legacy applications and integrate them with cloud-based platforms.
• Participate in architectural reviews, technical design sessions, and code reviews.

2. AI-Powered Software Engineering

• Actively utilize AI-assisted development tools to accelerate application development, debugging, refactoring, documentation, and testing.
• Demonstrate hands-on experience with tools such as:
  • GitHub Copilot AI-assisted coding, code generation, refactoring, and unit test creation.
  • ChatGPT / OpenAI Technical problem-solving, code optimization, API integration, and development productivity.
  • Claude Code analysis, technical documentation, and development assistance.
  • Cursor / Windsurf AI-native development environments and agent-assisted coding.
  • Microsoft Azure AI Foundry / Azure OpenAI Enterprise AI application development and integration.
• Evaluate and implement AI-based development workflows to improve engineering efficiency and software quality.
• Develop AI-enabled application features using LLM APIs, prompt engineering, Retrieval-Augmented Generation (RAG), and enterprise knowledge integration.
• Understand AI agent frameworks, function calling, vector databases, and AI orchestration patterns.
• Ensure AI-generated code meets organizational security, compliance, performance, and quality standards.
• Promote responsible AI usage, including protection of confidential information, human review of AI-generated outputs, and secure handling of enterprise data.

3. Enterprise Application Integration

• Design and develop integrations across enterprise platforms, SaaS applications, and internal systems.
• Build secure APIs and integration services using REST, JSON, OAuth 2.0, and OpenID Connect.
• Work with enterprise platforms such as Microsoft Dynamics 365, Salesforce, SAP, Oracle, or other business applications, as applicable.
• Develop automated workflows and integrations using Azure Logic Apps, Azure Functions, Power Automate, or comparable technologies.
• Support data exchange, transformation, synchronization, and integration monitoring.
• Troubleshoot complex application and integration issues across multiple systems.

4. Cloud, DevOps, and Automation

• Design and deploy cloud-native applications using Microsoft Azure
• Implement CI/CD pipelines using Azure DevOps, GitHub Actions, Jenkins, or equivalent platforms.
• Work with Docker, Kubernetes, serverless computing, and infrastructure-as-code technologies.
• Implement automated unit, integration, regression, and API testing.
• Utilize AI-assisted testing tools to improve test coverage and identify defects.
• Monitor application performance, security, availability, and operational reliability.
• Support secure software delivery practices, including DevSecOps and vulnerability remediation.

5. Database and Data Engineering

• Work with SQL Server
• Develop complex queries, stored procedures, data models, and performance optimization strategies.
• Implement secure data access and integration patterns.
• Support data pipelines and AI-ready data architectures where required.

6. Technical Leadership and Collaboration

• Serve as a senior technical contributor and mentor to development team members.
• Lead technical design discussions and recommend scalable engineering solutions.
• Collaborate with business analysts, solution architects, product owners, and enterprise application teams.
• Translate complex business requirements into maintainable technical solutions.
• Participate in Agile ceremonies, sprint planning, estimation, and delivery activities.
• Develop technical documentation, architecture diagrams, and implementation standards.
• Proactively identify opportunities to improve development processes through AI, automation, and reusable components.

Required Qualifications
Education and Experience

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related discipline, or equivalent practical experience.
• Minimum 10 years of professional software development experience, including significant hands-on full stack development.
• Demonstrated experience designing and delivering complex enterprise applications.
• Strong experience working in cross-functional enterprise IT environments.

About Us:
InterSources Inc, a Certified Diverse Supplier, was founded in 2007 and offers innovative solutions to help clients with Digital Transformations across various domains and industries. Our history spans over 19 years and today we are an Award-Winning Global Software Consultancy solving complex problems with technology. We recognize that our employees and our clients are our strengths as the diverse talents and opportunities they bring to the table enable us to grow as a global platform and they are causally linked with our success. We provide strategic and technical advice, and we have expertise in areas covering Artificial Intelligence, Cloud Migration, Custom Software Development, Data Analytics Infrastructure & Cloud Solutions, Cyber Security Services, etc. We make reasonable accommodations for clients and employees and we do not discriminate based on any protected attribute including race, religion, color, national origin, gender sexual orientation, gender identity, age, or marital status. We also are a Google Cloud partner company. We align strategy with execution and provide secure service solutions by developing and using the latest technologies that thrive our resources to deliver industry-leading capabilities to our clients and customers, making it convenient for our clients to do business with InterSources Inc. Our teams also drive growth by refining technology-driven client experiences that put the users first, providing an unparalleled experience. This results in strengthening the core technologies of clients, enabling them to scale with flexibility, create seamless digital experiences and build lifelong relationships.