Top Senior Software Engineer Jobs in Washington, DC

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

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.

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

The Senior Software Developer will collaborate with a remote team to enhance the Neuron platform, focusing on software development tasks including distributed system design and maintenance of features.

As a Senior Software Engineer FDE, you will integrate software into user environments, lead architecture and deployment, optimize data synchronization, and resolve real-time issues while bridging feedback to the core engineering team.

Lead architecture and design for highly available, low-latency cloud services. Drive AI-first engineering practices, evaluate and integrate AI-assisted development tools, mentor engineers, perform code and architecture reviews, and collaborate with Product and Design to build scalable, observable, and automated systems.

Lead engineer responsible for designing, developing, and optimizing petabyte-scale distributed data processing systems (Hadoop/Spark/Hive/Trino) on AWS. Leads performance tuning, system architecture, DevOps/CI-CD, security, AI tool adoption, and mentors engineers to improve product quality and delivery.

The role involves architecting scalable backend systems and data pipelines, providing technical leadership, and ensuring best practices in software development.

The role involves software development for a legacy web application, utilizing various programming languages and data engineering tasks for data migration, ensuring application integrity, and performance while collaborating with experts to refine requirements.

The Principal Software Engineer leads a team to develop full-stack real-time applications, integrates machine learning models, and influences software architecture in cloud environments while supporting healthcare analytics.

The role involves developing cross-platform API abstractions for the Unity Editor using modern C++. Responsibilities include maintaining codebases and collaborating with worldwide teams.

Design, build, deploy, and operate backend services, APIs, integrations, and web applications. Own end-to-end features, improve CI/CD and observability, troubleshoot cross-service issues, participate on-call, and collaborate with product and leadership to deliver reliable production systems.

The Senior Full Stack Engineer is responsible for full stack development, architecture, mentoring, and modernizing applications for the Wisconsin Medicaid Market, focusing on secure and scalable solutions.

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.

Design, develop, test, and manage full-stack .NET applications; integrate third-party components; improve and automate operations; support large-scale data processing, statistical modeling, and advanced analytics; participate in all SDLC phases; conduct architecture reviews and knowledge transfer.

Design and implement multi-agent optimization, planning, and constraint-satisfaction algorithms for real-time autonomous decision-making across heterogeneous domains. Build temporal logic frameworks, probabilistic decision-process models, and efficient, human-interpretable computational systems. Measure and optimize algorithm performance, develop in Bazel/Docker/Linux environments, and support demonstrations, integrations, and customer engagements.

Lead engineering teams in developing command and control software for mission systems. Manage technical execution, software architecture, and mentor engineers.

As a Senior Software Engineer in Test Automation, you'll design automation frameworks, develop CI/CD pipelines, and ensure the quality of VR training products.

The Senior Software Engineer will lead technical efforts for DOT's CMS, focusing on Drupal platform engineering, operations, and security compliance, ensuring high-performance and accessible environments.

Design, build, and maintain Quantifind's Apache Spark batch pipelines and backend platform that generate risk signals from diverse data sources. Implement scalable algorithms, data services, ETL pipelines, and microservices; deploy on Kubernetes and optimize storage/caching and distributed processing. Collaborate with Data Scientists, DevOps, Product, and Sales to deliver performant, testable systems processing terabytes daily.

The role involves leading software development for mission-critical applications, focusing on design, development, and maintenance using various technologies in a cloud environment.

Lead design, delivery, and operation of business-critical distributed systems. Build and maintain enterprise-grade, full-stack solutions, drive technical initiatives, mentor teammates, adopt new technologies, and deliver iterative customer-focused releases with emphasis on maintainability, performance, and scalability.

Design and implement core identity infrastructure for authentication and authorization. Build SSO, MFA, federated identity, and authorization systems (ReBAC/ABAC/RBAC). Create identity governance policies for compliance, integrate IAM with cloud services, and present technical guidance to stakeholders.

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.