Top Senior Software Engineer Jobs in Washington, DC

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 Forward Deployed Engineer, you will lead government AI model deployments, design full-stack systems, and ensure successful integrations and relationships with public sector stakeholders.

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.

Develops and enhances computer and network software for Naval Sea Systems Command programs. Responsibilities include analyzing user needs, designing software solutions, integrating hardware and software systems, developing specifications and performance requirements, and maintaining application databases. The role supports program management and requires extensive experience with naval surface radar, electronic warfare, EO/IR, decoy, or laser software systems. Work is primarily on-site at Washington Navy Yard, with infrequent travel to naval locations.

Supports Naval Sea Systems Command by analyzing user needs, designing and enhancing software, maintaining application databases, integrating hardware and software systems, and developing technical specifications. Collaborates across engineering, acquisition, logistics, security, and program-management disciplines. Applies systems engineering reviews, requirements decomposition, technology-readiness measures, program protection, and risk-management processes. The role is primarily on-site at Washington Navy Yard with infrequent travel to naval locations.

Develop backend Command & Control (C2) systems connecting Quindar's platform to satellites. Implement machine-to-machine communication, binary protocols, serialization, transport, stateful comms, telemetry, and hardware integrations. Onboard diverse spacecraft, translate interfaces into maintainable integrations, build scalable abstractions and tooling, and improve reliability, observability, and performance while collaborating cross-functionally.

As a Senior Software Engineer, you will enhance user experience for maritime tech, develop a real-time data platform, and oversee large engineering projects.

Lead design and implementation of cloud-based backend systems for global antenna scheduling, customer-facing APIs, billing/metering, and orchestration. Build reliable, scalable control and data planes across cloud and on-prem, collaborate with customers and operations, and enable secure TT&C and payload data transfer.

Serve as the sole QA resource in a classified environment to validate and certify platform releases. Design and execute end-to-end/system test plans and automation, maintain test configurations and lab environments, partner with development and release teams, review changes in test/staging, and ensure critical customer workflows remain functional for weekly releases.

Design, build, and operate Peregrine's cloud platform to improve performance, reliability, security, and cost-efficiency. Own infrastructure projects end-to-end, automate region/environment provisioning, implement autoscaling and right-sizing, harden security and compliance controls, improve incident response, and create developer-facing tooling and documentation. Mentor junior engineers and influence cross-team technical decisions.

Design, build, and maintain cloud-native full-stack applications and backend services that support investment risk analysis. Own end-to-end delivery, contribute to architecture, apply automated testing and CI/CD, collaborate with stakeholders, reduce technical debt, and ensure reliable, observable data and analytics for portfolio risk and simulations.

The Staff Software Engineer will lead implementations, mentor engineers, define technical strategies, and communicate with stakeholders while enhancing federal engineering capabilities.

Senior software developer supporting IRS mission-critical Java/middleware applications. Duties include production support, troubleshooting application and integration issues, incident response, release support/validation, enterprise API and microservices development, middleware (IBM webMethods), container orchestration (OpenShift/Kubernetes), application modernization, and Agile/DevSecOps collaboration. Occasional onsite support for meetings, deployments, or knowledge transfer is required.

Senior software developer responsible for implementing application-layer currency and supportability updates for middleware and microservices — including JDK/runtime upgrades, dependency remediation, certificate and credential updates, OpenShift/Linux compatibility, CI/CD and developer validation, rollback planning, and technical documentation.

Provide application-level production support and operations for enterprise middleware and integration services (IBM webMethods and Java-based BRE/BRMG). Troubleshoot production incidents, perform RCA, manage releases, validate failover/fallback, handle certificates/credentials, update runbooks, and maintain 24x7 operational readiness. Work with REST/SOAP APIs, microservices, OpenShift/Kubernetes, monitoring tools (AppDynamics, ELK), and ServiceNow for incident management.

Senior Software Developers lead projects by combining front-end and back-end technologies, guiding teams, and ensuring high-quality digital solutions that meet client needs. They mentor junior engineers and engage with stakeholders to improve processes and promote best practices.

Build and maintain scalable, user-centered backend and frontend systems. Design permission and secure collaboration frameworks for cross-organizational data sharing. Own major features end-to-end, work with product and design, iterate with deployment and users, and solve high-scale distributed system challenges.

Design and build control plane and automation systems to provision and manage network connectivity at scale. Extend APIs and self-service networking, automate infrastructure workflows across AWS and customer environments using Python, Terraform and Pulumi, and lead debugging of complex connectivity and distributed system issues.

Lead and mentor engineering teams to design, build, and ship scalable, production-grade software. Own major features, drive technical decisions, collaborate with product and design, and ensure reliable distributed systems supporting real-time collaboration, high-scale data ingestion, and ML-powered features.