Top Software Engineer Jobs in Washington DC,

The Principal Engineer will lead technical initiatives in AI-driven tax software, mentor engineers, enforce technical standards, and contribute to architectural design and product innovation.

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.

Lead the design and implementation of secure, scalable data processing platforms, focusing on ETL frameworks, event-driven systems, and high-performance microservices.

Leads full-stack application development for order management and procurement systems. Designs scalable solutions, establishes technical direction, mentors developers, enforces coding and testing standards, and delivers complex front-end and back-end features. Partners with architecture, delivery, and business teams to translate requirements into maintainable software. Drives engineering process improvements, risk mitigation, strategic planning, and responsible adoption of AI-powered development tools to improve productivity, quality, and testing outcomes.

Build and operate production custody systems: signing service, key management, chain integrations, and transaction pipelines. Own end-to-end subsystems, integrate new chains, collaborate with cryptography on threshold signing and key recovery, write post-mortems, and produce clear async design docs and PRs.

Design, build, and maintain backend services and APIs using Ruby on Rails. Improve performance, scalability, reliability, and write well-tested production code. Collaborate with Product, Frontend, Data Engineering, and QA teams.

Design, build, and maintain backend services and APIs using Ruby on Rails. Ensure performance, scalability, reliability, and test coverage. Collaborate with Product, Frontend, Data Engineering, and QA to deliver production-quality code for web and mobile platforms.

Design, develop, and enhance custom SAP Fiori/UI5 applications; configure Fiori Launchpad; integrate OData services; perform UI debugging, performance optimization, code reviews, unit testing, and documentation while collaborating with backend and functional teams.

Lead design, build, test, and deliver Workday integrations across a multi-system higher education environment. Own integration strategy, implement EIBs/Core Connectors/Studio/APIs, coordinate testing and cutovers, ensure FERPA-compliant data security, and partner with vendors and IT for documentation and operational handoff.

Lead Workday configuration and development across modules; design BPF workflows; build calculated fields, condition rules, and custom objects; define security roles; support testing, deployment, and post-production stabilization; document configurations and ensure Higher Ed governance compliance.

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

Volunteer Salesforce Architect to design and implement Health Cloud solutions, lead integrations (APIs, MuleSoft), configure Salesforce products (Service, Experience, Lightning), support users and BAs, produce technical documentation, and guide technology roadmaps and releases.

Volunteer senior engineer to develop a cross-platform medical/wellness app (web, iOS, Android). Own full SDLC: design, coding, testing, data models, pipelines, deployments, and collaborate in Agile processes. Attend weekly standups and commit at least 4 hours weekly.

Develop ServiceNow customer applications for work order management, scheduling, and dispatch. Collaborate with stakeholders and technical SMEs, enhance event rules and CMDB binding, configure Discovery and Service Mapping, manage MID servers, build integrations using REST APIs, prevent duplicate CIs, and migrate and configure custom discovery and application patterns across environments.

Build end-to-end features across frontend and backend using React/TypeScript and Node.js (some legacy Go). Collaborate with design, ship via continuous deployment, debug and monitor production, use AI coding tools, and make product and technical decisions while owning delivered features.

Build end-to-end product features with a backend focus: schema and API design, UI work in React/TypeScript, GCP/Terraform infrastructure, CI/CD, DB performance tuning, production ownership, and product decision-making using AI coding tools.