Top Senior Software Engineer Jobs in Washington, DC

Design, develop, integrate, test, and maintain end-to-end software solutions. Build backend services, RESTful APIs, data integrations, and user-facing features using frontend frameworks. Participate in technical design, code reviews, troubleshooting, CI/CD, and Agile practices while collaborating with architects, product owners, and stakeholders. TS/SCI with polygraph required.

Leads hands-on development of full-stack applications using .NET, React, Next.js, and Azure. Owns architecture, coding, code reviews, testing, security, reliability, observability, production support, and cloud deployment. Integrates AI and GenAI capabilities such as LLM features, RAG, semantic search, and agentic workflows. Mentors engineers, establishes technical standards, collaborates with stakeholders, supports hiring, and helps deliver scalable, secure software.

Leads technical initiatives and designs, builds, operates, and improves scalable distributed systems. Collaborates across organizations, drives maintainability and performance, evaluates emerging technologies, delivers iterative releases, and mentors engineers. Requires polyglot full-stack development, strong SQL and distributed systems expertise, cloud experience, communication skills, and quarterly or as-needed travel. Preferred experience includes event-driven architectures, AI-assisted development, Kafka, APIs, containers, infrastructure as code, monitoring, CI/CD, and agile methodologies.

Build and maintain developer-facing tools and APIs for MongoDB Atlas and Compass. Work full-stack on customer-facing UIs and backend services, design scalable, highly available web applications, collaborate cross-functionally, troubleshoot distributed systems, and improve performance and developer experience.

Design, develop, test, deploy, maintain, and enhance software solutions. Manage priorities and deliverables, participate in design reviews, perform code reviews, triage and debug issues, contribute documentation, and collaborate in cross-functional agile teams to build scalable web applications.

As a Forward Deployed Software Engineer, partner with high-impact public sector customers by developing full-stack applications and providing technical guidance throughout the project lifecycle.

The role involves building AI applications for government, architecting deployments, collaborating with research, and ensuring effective customer integration.

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 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.

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, 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.

Seeking a Staff Storage Engineer to design and build control plane for an AI storage platform, focusing on scalability and performance across diverse environments.

Develop highly available, scalable cloud-based integration services for Axon’s real-time operations platform. Drive cross-team technical architecture, integration frameworks, partner onboarding, technical roadmaps, and reusable platform components. Collaborate with engineering, product, design, professional services, and external partners; lead architecture reviews, mentor engineers, improve engineering processes, and leverage AI to enhance customer experiences.

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.

Own frontend architecture for multi-tenant applications serving internal, customer, and partner audiences. Build React and TypeScript interfaces, shared component libraries, theming and branding systems, accessible user experiences, and integrations with governed APIs. Establish engineering standards, document technical decisions, navigate open architecture questions, and support workflows ranging from immediate interactions to longer approval processes involving sensitive or regulated data.

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.

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.

As a Staff Software Engineer, you will lead technical strategies, develop APIs and microservices, and mentor engineers for innovation at GEICO.

The Principal Software Engineer builds and scales data pipelines for threat intelligence, ensures production reliability, and drives architectural improvements while collaborating across teams.

Embed with U.S. government customers to design, build, deploy, and maintain mission software from prototype to production. Own end-to-end delivery, build backend systems and data integrations, collaborate with product and engineering to scale reusable capabilities, and serve as the technical point of contact to drive adoption and mission impact.

As a Software Engineer on the Mission Dev team, you will deploy software in federal environments, manage integrations, and support mission-critical programs for government agencies.

Design, build, and operate TypeScript microservices and integrations that run the billing lifecycle, including payment and CRM integrations, event-driven workflows, entitlement enforcement, provisioning pipelines, admin tooling, testing, on-call incident response, and mentoring engineers to ensure reliable, auditable financial workflows.

As a Staff Software Engineer, you will lead the development of Apache Iceberg, enhancing data handling capabilities for large-scale systems, collaborating with teams, and architecting solutions for modern data lakes.