Top Software Engineer Jobs in Washington, DC

Support software design, development, testing, and maintenance for a NAVSEA program office. Contribute to coding, debugging, and technical documentation under senior direction while following engineering processes and standards. Work supports classified programs requiring DoD Secret clearance.

Develop, test, and maintain software for a NAVSEA program office. Support design implementation, defect resolution, API integration, automated testing, and team-based Agile development. Role requires DoD Secret clearance (or clearable) and is contingent on contract award.

Design, build, test, and deploy wargame-specific software and integrated GIS-based common operating picture tools. Create multi-user front-end interfaces, integrate and dynamically update databases, and support planning, execution, and post-game analysis for HQ USAF wargames.

Design, build, test, deploy, and support software for USAF wargaming; develop UI/UX (including map interfaces), integrate M&S and databases, support systems engineering, and employ multi-agent/LLM-based tools like MAGE during planning and execution phases.

The role involves building and managing GCP infrastructure, automating platform tasks, and ensuring efficient deployments and security for the engineering teams.

As a Software Engineer, you'll build full-stack applications, lead projects, debug issues, participate in code reviews, and help maintain technical standards while collaborating with the team to meet customer needs.

Contract 6-month full‑stack role building and shipping web applications. Develop UIs in React, back-end services in Python/Ruby/Node, work with SQL, collaborate with engineers, data scientists and product managers, review/debug code, follow best practices, prototype solutions, and integrate AI/ML tools.

As a Software Engineer for the ARC team, you'll design and implement secure backend systems, manage model inference layers, improve engineering standards, and collaborate with teams to meet government agency needs.

Design and build a novel, highly scalable data infrastructure to aggregate and stage simulation outputs and user inputs for LLM consumption. Architect massive batch pipelines, complex relational data models, and low-latency distributed processing. Lead technical direction, solve ambiguous first-principles problems, and optimize data for downstream AI decision systems supporting government customers.

Serve as the technical lead modernizing mission-critical defense software: deploy and extend agentic modernization platforms, analyze large codebases, design scalable architectures, ensure RMF/NIST-compliant deployments, and deliver production-ready solutions in classified environments.

Design, implement, and deploy autonomy capabilities for space platforms including distributed optimization, tasking/scheduling, track fusion, RPO, and motion/behavior planning. Build high-performance, well-tested software modules, collaborate across perception, planning, simulation, hardware, and flight test teams, support deployments and mission log analysis, and contribute R&D and roadmaps to advance autonomy for satellites and missile defense.

Lead development of autonomy capabilities for space platforms including distributed optimization, tasking/scheduling, track fusion, RPO and motion planning. Build high-performance, well-tested software, integrate on real vehicles, support deployments and testing, and research/roadmap advanced autonomy techniques for defense applications.

Design, implement, deploy, and operate large-scale distributed backend systems and Azure infrastructure for AI-driven insights. Apply generative AI/ML, build IaC and CI/CD pipelines, support live-site operations, and execute onboarding and operational tasks for GCC‑High/DoD environments while ensuring security, observability, and cross-team collaboration.

Develop, test, and maintain software components; participate in requirements analysis, design, architecture, integration, and project activities; diagnose and fix bugs; collaborate with architects, designers, and product managers; build scalable REST APIs and work with databases, search technologies, and modern front-end frameworks.

Design and implement cloud-native backend systems for federal customers enabling agentic AI capabilities. Build data pipelines, optimize retrieval, create guardrails and agent orchestration, define requirements with stakeholders, and participate in customer engagements to deliver secure production features.

Build and maintain production-grade APIs, services, developer tooling (SDKs, CLIs, validators), and documentation. Implement CI/CD, infrastructure as code, cloud environments, and observability. Collaborate across disciplines, mentor teammates, troubleshoot production issues, and use AI tools responsibly to improve delivery.

Design, develop, test, and maintain front-end and back-end components for an enterprise Postgres/Java/React system. Integrate APIs, implement CI/CD and containerized deployments, participate in full SDLC activities, code reviews, architecture sessions, and ensure accessibility and security compliance while collaborating with cross-functional agile teams.

As a Software Engineer, you will design and build backend services for Relativity's generative AI platform, focusing on scalability and reliability in distributed systems.

As a Staff Wireless Software Engineer, you will develop and architect wireless protocol stacks, optimize performance, and lead design implementations for real-time communication systems, collaborating closely with hardware and firmware teams.

Join a cleared software development team to design, implement, test, and deploy on-premises and cloud applications. Develop backend services, resolve software issues, implement security controls, automate deployments, document and train users, and contribute to Agile deliveries and performance metrics.

Develop, test, debug, and deploy on-premises and cloud backend and full-stack applications. Work on large-scale data analysis projects, integrate with deployment/patching tools, produce documentation, and support users. Operate in an Agile team, contribute to design, performance, security, and quality, and deliver innovative solutions while protecting classified data.

Design, build, and maintain blockchain and payments infrastructure; develop scalable microservices and secure RESTful APIs to transfer value across blockchain and banking protocols; integrate with banks and fintech; own system design, testing, deployment, and troubleshooting; ensure reliability, code quality, and strong test coverage while collaborating with product and engineering teams.

Develop and maintain full-stack applications using Python/FastAPI and ReactJS. Build RESTful APIs, manage PostgreSQL schemas and migrations, containerize with Docker, and deploy/monitor applications on AWS. Participate in Agile ceremonies, write automated tests, and collaborate with cross-functional teams to deliver secure, scalable solutions for a federal program.

Design, develop, maintain, and enhance SmartCop public-safety applications across the software development lifecycle. Collaborate with cross-functional teams, use C#/.NET and MS SQL Server, consume/develop web services, apply object-oriented design, leverage AI-assisted development tools, participate in code reviews, and follow automated testing and quality-focused practices. Support deployment, troubleshooting, and implementation decisions while meeting North American Central Time collaboration requirements.

Lead the design and deployment of autonomous AI systems in investment technology, collaborating across teams to enhance business processes and decision-making through AI.