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Develop and maintain Java and React applications using Spring Boot, microservices, AWS ECS, and DevOps practices. Build scalable cloud applications, data pipelines, integrations, and tooling; optimize performance and reliability; troubleshoot production issues; and collaborate with designers, product owners, engineers, and business stakeholders. The role also involves data-driven insights, Agile delivery, CI/CD, code reviews, and exploring AI-enabled user interface solutions.
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Develop and deploy customer-focused web, mobile, and backend applications across the full software stack. Design major features, contribute to architecture decisions, conduct code reviews, and ensure secure, high-quality implementations. Collaborate with stakeholders and cross-functional teams using Agile and SDLC practices. Manage version control, CI/CD, environments, and releases; maintain automated test coverage and perform root-cause analysis. Build and optimize relational data solutions using SQL Server, including complex queries, stored procedures, and performance tuning.
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Own full-stack modernization of complex federal legacy systems using Java, Spring Boot, REST APIs, React, and relational databases. Responsibilities include analyzing legacy workflows, designing scalable applications, building backend integrations and user interfaces, testing and deploying software, troubleshooting across application layers, and collaborating with technical and non-technical stakeholders. The role supports Agile delivery and migration toward the Palantir platform.
LightFeather is seeking a Senior Full Stack Engineer to support a federal government client in modernizing critical mission systems. You will own full stack delivery with a focus on translating complex legacy system behavior into clean, scalable software.
The current environment includes large legacy systems managing operational workflows such as processing, tracking, and encounter management. These systems carry layers of business rules, manual processes, and tightly coupled functionality. The core challenge is understanding how they work in practice, identifying mission-critical functionality, and translating it into a modern platform-based architecture. The client is adopting Palantir as the target modernization platform. This is a Full Time, Remote Position.
- Location: Fully Remote (EST hours)
- Job Type: Full-time
- Salary: $90,000–$115,000 annually, based on experience level.
- Clearance Requirement: U.S. citizenship is required for this position due to federal contract requirements and the need to obtain and maintain a Public Trust.
Responsibilities:
- Design, develop, and maintain full stack applications supporting modernization of systems.
- Analyze legacy systems and workflows to identify core functionality vs. unnecessary process overhead.
- Translate operational requirements into scalable, modern application designs.
- Develop backend services, APIs, and integration layers connecting legacy environments to modern platforms.
- Build and enhance user-facing components using modern front-end technologies.
- Support the full SDLC: analysis, design, development, testing, deployment, and maintenance.
- Troubleshoot issues across application, integration, and data layers.
- Collaborate with stakeholders to clarify requirements and improve system behavior.
- Participate in code reviews and uphold engineering best practices.
Required Qualifications and Skills:
- U.S. Citizenship is required with the ability to obtain and maintain a Public Trust clearance.
- Bachelor's degree in Computer Science or related field (or equivalent experience).
- 7+ years of hands-on full stack software development experience.
- Experience working in complex or enterprise system environments.
- Strong experience with Java and frameworks such as Spring Boot.
- Experience designing and implementing RESTful APIs.
- Experience with front-end technologies including JavaScript, React, HTML, and CSS.
- Experience working with relational databases and data access patterns.
- Ability to troubleshoot across multiple layers of an application stack.
- Experience working in Agile or iterative delivery environments.
- Ability to analyze and simplify complex systems and workflows.
- Strong systems thinking and problem-framing capability.
- Comfort working in ambiguous, poorly documented environments.
- Ability to distinguish between essential functionality and legacy process bloat.
- Strong ownership mindset and accountability for outcomes.
- Effective communication with both technical and non-technical stakeholders.
- High learning agility and willingness to adopt new platforms and tools.
Preferred:
- Experience with legacy system modernization or transformation efforts.
- Experience supporting federal or mission-driven environments.
- Exposure to enterprise data platforms or large-scale system integrations.
- Experience working in environments where requirements must be derived from real-world usage rather than formal documentation.
Why Join LightFeather?
At LightFeather, you're not just taking a job — you're joining a purpose-driven team that delivers innovative, mission-critical solutions to make a real difference. You'll work on diverse, meaningful projects that challenge and inspire you, alongside some of the best minds in the industry.
LightFeather is an Equal Opportunity Employer. We consider all qualified applicants for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, disability, veteran status, genetic information, or any other status protected by applicable federal, state, or local law.
What you need to know about the Boston Tech Scene
Boston is a powerhouse for technology innovation thanks to world-class research universities like MIT and Harvard and a robust pipeline of venture capital investment. Host to the first telephone call and one of the first general-purpose computers ever put into use, Boston is now a hub for biotechnology, robotics and artificial intelligence — though it’s also home to several B2B software giants. So it’s no surprise that the city consistently ranks among the greatest startup ecosystems in the world.
Key Facts About Boston Tech
- Number of Tech Workers: 269,000; 9.4% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Thermo Fisher Scientific, Toast, Klaviyo, HubSpot, DraftKings
- Key Industries: Artificial intelligence, biotechnology, robotics, software, aerospace
- Funding Landscape: $15.7 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Summit Partners, Volition Capital, Bain Capital Ventures, MassVentures, Highland Capital Partners
- Research Centers and Universities: MIT, Harvard University, Boston College, Tufts University, Boston University, Northeastern University, Smithsonian Astrophysical Observatory, National Bureau of Economic Research, Broad Institute, Lowell Center for Space Science & Technology, National Emerging Infectious Diseases Laboratories
