Top Software Engineer Jobs in Washington, DC

Develops, tests, maintains, and modernizes secure ACWS software components, APIs, integrations, and services. Implements user stories, resolves defects, performs unit testing, supports sprint and release activities, analyzes production issues, and coordinates durable technical solutions. Collaborates with architects, analysts, testers, DevSecOps teams, and stakeholders while supporting refactoring, legacy modernization, documentation, and technical debt reduction.

Build internal software and AI-powered systems that connect Product, Engineering, Sales, Marketing, Programs, and Operations. Responsibilities include integrating SaaS tools, APIs, databases, LLMs, and AI agents; automating workflows; creating systems that translate product specifications into engineering work; maintaining synchronized documentation; supporting controlled government proposal workflows; and improving how employees and agents collaborate.

Design, build, and support scalable full-stack software, backend services, databases, and cloud-native applications for investment risk and portfolio analytics. Contribute to architecture, technical decisions, automated testing, observability, CI/CD, data reliability, and technical debt reduction. Partner with engineering, product, business stakeholders, risk analysts, portfolio managers, and quants to deliver effective technology solutions.

Leads Calypso integration architecture, custom adapter development, testing, code reviews, upgrades, environment management, and production support. Designs Azure API Management and Azure Service Bus integrations, messaging, monitoring, logging, and error-handling patterns. Optimizes SQL and database performance, supports CI/CD and DevOps, manages security controls, troubleshoots infrastructure and application issues, prepares technical documentation, and coordinates engineering teams and stakeholders.

Design and build secure, scalable enterprise clinical workflow systems for Butterfly Cloud. Solve distributed-systems challenges involving elasticity, reliability, performance, and automated validation. Lead system design, own business problems, guide developers through execution, and mentor engineers. The role may span frontend and backend layers and involve cloud architecture, observability, search, real-time applications, GraphQL, containerization, and healthcare data compliance.

Develop full-stack, user-facing software for distributed autonomous maritime systems. Build real-time data platforms, visualization tools, command-and-control interfaces, external integrations, and cloud-to-embedded system features. Own major engineering projects, make technical architecture decisions, collaborate across hardware and autonomy teams, gather user feedback, mentor engineers, and support software operating in controlled or classified environments.

Design, develop, test, maintain, and troubleshoot Pega applications using the Pega PRPC platform. Collaborate with business analysts, project managers, and developers to translate requirements into technical solutions. Create technical documentation, support UAT, participate in code reviews, optimize application performance, and ensure scalability and reliability. The role also involves integration work, continuous learning, and potentially Agile, DevOps, and cloud platform practices.

Build and maintain Cloudflare’s globally distributed Quicksilver key-value store using Go and C. Develop features, improve CPU and memory performance, enhance monitoring and operational tooling, and debug complex, hard-to-reproduce issues across the software stack. Responsibilities include code reviews, testing, deployments, rollbacks, operations, alerting, and on-call support for a system operating across tens of thousands of servers and hundreds of data centers.

Develop, integrate, and field autonomy software for unmanned platforms; lead a small technical team through design-to-deployment; author ICDs; perform hardware/software debugging, system bring-up, simulation testing, and mission support; mentor engineers and coordinate with internal teams and external integrators. Travel ~10-20%.

Integrate and deploy autonomy software onto unmanned aircraft, prepare flight-ready systems, support on-site flight tests, debug hardware/software issues, collect and analyze flight data, collaborate across autonomy, GNC, and test teams, and support certification, compliance, and process improvements.

Lead design, integration, and fielding of autonomy software on unmanned platforms. Develop mission behaviors, platform control, multi-agent coordination, and deployment pipelines; own validation from simulation to live tests. Drive technical strategy, cross-team architecture, standards compliance, mentor senior engineers, and support on-site test/mission operations and hardware/software debugging.

Lead design and implementation of tactical autonomy behaviors for unmanned platforms. Develop, test, and deploy multi-agent coordination, motion/behavior planning, and survivability features across vehicles while owning end-to-end system lifecycle and collaborating with integration teams and end users.

Lead systems engineering for Hivemind-based autonomy products: define and manage requirements, develop system architectures and trade studies, coordinate hardware/software interfaces, support integration/verification/validation and testing, and identify and mitigate technical risks across the system lifecycle.

Lead design and prototyping of generative AI experiences for autonomy development; drive UX for Hivemind products; perform user research, collaborate with CTO and product leads, and deliver reference implementations and integrations across full-stack web and edge systems.

Integrate autonomy software onto unmanned aircraft, prepare and validate flight-ready systems, support on-site flight tests, debug hardware/software integration, capture and analyze flight data, collaborate with autonomy/GNC/systems teams, improve integration processes, and assist with certification and compliance. Travel ~30-40% for tests and field events.

Develop, integrate, and field autonomy software on unmanned platforms; own end-to-end integration from simulation to live tests; debug embedded/latency-sensitive systems; support on-site flight/sea/space tests; ensure C2 interoperability and improve deployment/test tooling and processes.

Design, implement, and own tactical autonomy behaviors for unmanned platforms. Develop and test multi-agent coordination, motion and behavior planning, target engagement, and survivability features. Work across the software lifecycle, integrate with sensor, estimation, communications, and control systems, contribute to shared frameworks, and support platform integration and testing (travel up to 20%).

Integrate autonomy software onto unmanned aircraft, prepare and validate flight-ready systems, support on-site flight tests, debug hardware/software interactions, capture and analyze flight data, collaborate with autonomy/GNC/systems teams, and support certification and compliance. Frequent travel (~30-40%) for field tests.

Design and implement full‑stack, low‑latency web-based Ground Control Station and C2 systems (map-centric UIs, real-time telemetry, video streaming), lead architecture and APIs, mentor engineers, support field tests and mission deployments, and ensure interoperability with C2 standards.

Design, develop, and maintain complex safety-critical software for nuclear energy applications. Responsibilities include software architecture, coding, code reviews, system integration, mentoring engineers, testing, debugging, performance optimization, regulatory compliance, and technical documentation. The role requires collaboration with hardware and control systems teams and may involve disconnected or containerized applications, physical security integrations, and production AI/ML features.

Lead the architecture, development, and operation of enterprise-grade full-stack software for clinician-facing and performance-management experiences. Design distributed systems, drive technical initiatives, improve scalability and maintainability, adopt modern technologies, deliver iterative releases, and collaborate across organizations. Mentor engineers and establish strong engineering practices. The role requires polyglot programming, cloud platforms, modern front-end development, SQL, distributed systems, and production operations experience.

Build and deliver user-facing features across frontend and backend. Own projects end-to-end, design APIs and database schemas, collaborate with designers and engineers, participate in code reviews, and work with end users to meet operational needs.

As a Senior Software Engineer on Substrate, you will design and build managed Kubernetes product offerings, ensuring scale, security, and stability across various environments, while emphasizing automation and operational excellence.

In this role, you will drive infrastructure strategy, build APIs for network infrastructure, and improve Kubernetes networking and observability systems.

Own and ship major user-facing product features across search, dossiers, charts, maps, networks, dashboards, and mobile. Partner with design, product management, deployment teams, and users to build fast, intuitive, trustworthy experiences. Develop full-stack software using React and TypeScript alongside Python-based backend systems, while addressing distributed systems scalability, AI-assisted capabilities, latency, resilience, and reliable production deployment.