Top Senior Software Engineer Jobs in Washington, DC

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.

Build and operate Cloudflare’s large-scale Kubernetes platform running on bare-metal Linux. Design resilient systems, support application teams, improve resource efficiency, harden infrastructure, and respond to platform incidents. The role combines software engineering with DevOps responsibilities, including production Kubernetes operations, Linux systems debugging, container networking, and contributions to open-source projects.

Design, build, and own scalable microservices and secure APIs that transfer value across blockchain and banking protocols. Extend in-house blockchain infrastructure, integrate with banks and cloud services, troubleshoot production issues, document system and testing procedures, and collaborate with product and engineering teams to deliver reliable payment experiences.

Leads full-stack development, architecture, modernization, security, cloud deployment, and troubleshooting for enterprise applications. Develops C#/.NET services, REST APIs, reusable components, and React or Angular interfaces; supports microservices, containers, CI/CD, and cloud platforms. Provides technical leadership, mentoring, code reviews, secure coding guidance, stakeholder communication, and delivery support in an Agile environment.

Designs, develops, tests, maintains, and supports Pega PRPC applications for business process automation. Responsibilities include translating requirements into technical solutions, creating documentation, performing testing, troubleshooting issues, optimizing performance, participating in code reviews, and applying development best practices. Requires at least five years of Pega development experience, strong PRPC knowledge, integration experience, SQL knowledge, and U.S. citizenship. A Secret clearance is required.

Build and operate backend microservices and AWS cloud infrastructure using Go, Python, Terraform, Kubernetes, and CI/CD. Design APIs, improve reliability and observability, respond to incidents, and implement security controls supporting FedRAMP and CMMC compliance. The role owns infrastructure and backend workstreams end to end, collaborates with US and UK teams, and participates in architecture, technical design, and on-call support.

Develop and maintain front-end and back-end components for the FBI FDP system using Java, React, and PostgreSQL. Responsibilities include requirements analysis, testing, QA, code reviews, architecture participation, code integration, CI/CD, deployments, version control, and operations optimization. The engineer will collaborate with product, business analysis, and testing teams within an agile development environment to deliver enterprise application features through the full software development lifecycle.

Designs, develops, maintains, and modernizes enterprise Oracle business systems. Responsibilities include Oracle Forms and Reports development, advanced PL/SQL backend engineering, WebLogic administration, database performance tuning, application migration, documentation, and Linux/Unix deployments. The role also requires collaboration with business analysts and end users, version control, SDLC practices, and eligibility to obtain and maintain a Public Trust clearance.

Design, develop, test, deploy, and maintain .NET applications and services across the software development lifecycle. Troubleshoot application, integration, and compatibility issues; write automated tests; participate in code reviews; collaborate with product managers, designers, developers, and stakeholders; and improve development processes, tools, and technical execution.

Build reliable Rust libraries and services for decentralized, offline-first data synchronization. Design CRDT-based systems using content addressing, deduplication, and Merkle trees; improve observability through metrics, logs, and traces; diagnose customer issues; and translate findings into product improvements. The role requires strong asynchronous communication, design documentation, and collaboration in a distributed team.

Develop and optimize GPU-accelerated quantum computing simulators for NVIDIA CUDA-Q. Build simulation components, quantum circuit and operator representations, execution interfaces, Python bindings, and resource management. Improve performance, memory use, CPU-GPU movement, and multi-GPU scaling. Collaborate with SDK, research, product, and open-source teams while implementing simulation methods such as state-vector, tensor-network, stabilizer, and open-system dynamics approaches.

Own and ship major user-facing platform features across search, dashboards, maps, networks, tables, documents, automations, and mobile. Collaborate with product, design, deployment teams, and users to build fast, intuitive, trustworthy experiences. Develop full-stack software using React and TypeScript frontend technologies alongside Python-based backend systems, distributed data infrastructure, AI capabilities, and cloud platforms. Solve complex problems involving semantic discovery, real-time collaboration, scalability, latency, resilience, and transparent AI-powered workflows.

Owns end-to-end architecture and delivery of fintech payment infrastructure across Pix, digital accounts, boletos, and Open Finance. Responsibilities include system design, ledger and reconciliation patterns, backend and frontend development, event streaming, observability, security, AI-assisted engineering, technical roadmaps, code reviews, mentoring, and cross-functional collaboration.

Leads the design, development, integration, testing, deployment, and maintenance of mission-critical software applications and systems. Provides technical leadership, develops architectures, resolves complex defects, evaluates performance, ensures security and quality compliance, supports configuration and release management, collaborates across multidisciplinary teams, and mentors junior engineers.

Design and build full-stack VR training features across backend services, APIs, data systems, and React applications. Lead projects from design through release, make technical trade-offs, ensure reliability and scalability, conduct code and design reviews, collaborate across teams, mentor engineers, and use AI-assisted development tools with disciplined validation.

Build scalable full-stack interview-platform features, including AI-enhanced capabilities, APIs, user interfaces, infrastructure, and production services. Collaborate with product, design, and data science teams; contribute to architecture decisions; improve reliability, performance, and security; and provide technical leadership through mentoring and engineering best practices.

Designs and delivers cloud-based software solutions for government customers using modern engineering practices. Partners with customers, Microsoft product teams, and open-source communities to develop scalable solutions. Leads architecture and design, mentors engineers, drives cross-product project and release plans, and serves as a designated responsible individual for system reliability, monitoring, and on-call support.

Lead the architecture and development of scalable, secure healthcare technology, including real-time data pipelines, distributed systems, microservices, and clinical data integrations. Own products from concept through deployment, optimize performance and infrastructure costs, lead modernization efforts, and build cloud-native solutions using AWS and Kubernetes. Collaborate with product and engineering teams, mentor engineers, communicate technical concepts, and explore AI/ML and real-time analytics applications.

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.

Design, develop, and deploy cloud applications in a secure Army cloud environment. Modernize a large-scale document management and search platform, optimize indexing and metadata for over 100 million documents, integrate generative AI and machine learning, and improve scalability. Responsibilities also include cloud security controls, system administration, DevSecOps, CI/CD, database optimization, user interface development, maintenance, and support within a hybrid government environment.

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.

Designs and delivers cloud-based software solutions with strategic customers and Microsoft product teams. Leads requirements definition, architecture, dependency identification, design documentation, and development of maintainable code. Mentors engineers, contributes to open-source assets, coordinates project and release plans, and serves as a designated responsible individual for system reliability, monitoring, on-call support, performance, and operational improvements.

Develop and maintain Java web applications that interact with databases. Responsibilities include gathering requirements, writing Java and SQL code, optimizing database queries, supporting backend development and data integration, applying Agile and software development best practices, and collaborating with technical teams to deliver quality code.

Designs, develops, deploys, and maintains software applications, APIs, analytics solutions, AI-enabled capabilities, and automation services. Builds CI/CD pipelines, automated testing, governance controls, and monitoring processes. Integrates AI models and services such as LLMs, OCR, NLP, and ranking models into mission applications. Collaborates with stakeholders, documents technical solutions, and improves system reliability, security, scalability, and operational effectiveness.

Lead the design, development, and delivery of scalable backend and patient-facing software for MinuteClinic. Set technical direction, mentor engineers, drive architecture and engineering excellence, and collaborate with product, design, and architecture teams. Build cloud-based services, APIs, distributed systems, CI/CD pipelines, automated testing, and observability solutions while adopting AI-assisted development practices. Healthcare technology, interoperability standards, microservices, and front-end experience are preferred.