Top Senior Software Engineer Jobs

As a Senior Backend Engineer, you will develop APIs, collaborate with various teams, and manage project priorities while ensuring communication is efficient and inclusive.

Design, build, and scale backend services, APIs, and full-stack features powering patient booking, clinician routing, logistics, and device integrations. Solve scheduling, dispatch, safety, and clinical-error prevention challenges, integrate external health systems and medical devices, and own projects 0→1 while collaborating with product, data, ops, and clinical teams.

Design and implement large-scale routing, scheduling, forecasting, and simulation systems to optimize clinician dispatch and capacity. Prototype and productionize optimization and predictive models, collaborate with product and ops, and own end-to-end projects in a distributed environment.

Build and scale backend and full-stack systems powering patient booking, clinician routing, logistics, and device integrations. Own 0->1 projects, design APIs and data models, integrate external health systems and medical devices, solve operational challenges at scale, and collaborate with product, data, ops, and clinical teams to deliver secure, reliable production software.

Build simulation and planning systems for complex communications networks. Develop tools that model hypothetical scenarios, vary configurations and assumptions, compare outcomes, surface tradeoffs, and identify risks. Design scalable, reliable backend systems for complex, evolving network states while collaborating across product engineering to integrate capabilities into broader workflows. Responsibilities span system design, implementation, testing, debugging, and operational support.

Own and scale React Native mobile applications across multiple custom-branded client apps. Manage features end to end, including requirements, architecture, development, testing, release pipelines, App Store and Google Play submissions, production support, and rollbacks. Debug React Native and native platform issues, contribute to system design and code quality, and collaborate with leadership, clients, and engineering teammates. Help consolidate legacy systems and advance service-based architecture.

Design, build, and maintain full-stack web and mobile applications using modern JavaScript frameworks. Produce high-quality, testable code, participate in architecture and estimation, support existing client sites, follow QA and review practices, and optimize performance and scalability. Collaborate with product managers, UX, and cross-functional teams.

Build and maintain quantum computer management systems, controls infrastructure, and calibration services. Own mission-critical software, collaborate with physicists and hardware engineers, and develop scalable, efficient systems. Responsibilities include debugging, troubleshooting, designing cloud-native microservices and event-driven architectures, working with scientific instrument data, and supporting system performance and operations.

The Software Engineer will architect and enhance billing systems, develop integrations, and collaborate with various teams to ensure effective monetization of OpenAI products.

Build and maintain Go-based backend services and APIs on AWS for agentic AI workflows, including metadata suggestions, automated ownership reassignment, system deprecation, and agent/MCP inventory. Design database schemas and queries in PostgreSQL and MongoDB, integrate asset discovery tooling, map dependencies and user journeys, and refactor legacy code safely. Deliver tested features through Agile/Scrum while collaborating with program and customer teams.

Develops and supports mission-planning software across the full lifecycle in an Agile Scrum environment. Responsibilities include software design, coding, debugging, CI/CD pipeline maintenance, environment deployment, Windows installer creation, integration and automated testing, formal test-event support, troubleshooting, technical customer interaction, documentation, and Scrum Master duties. Work is fully on-site in Hollywood, Maryland, supporting defense systems under a current Secret clearance.

Develop, maintain, test, and enhance complex software systems using Java, Python, and AWS. Responsibilities include algorithm development, large-data processing, real-time systems, automated functional and system testing, software problem resolution, requirements analysis, cloud prototyping, and collaboration with systems engineers in an agile environment.

The Senior Software Engineer will lead technical discussions, develop innovative software solutions, mentor junior engineers, and enhance data communications systems. They require 5+ years of experience and programming skills in Python, C, and C++.

Lead software support for high-volume defense manufacturing: maintain and optimize build/test software, resolve production floor software issues in real time, integrate with hardware, and improve reliability of production and verification tools.

Build and evolve the Durable Objects runtime and its routing/storage systems. Improve reliability, scalability, and performance for stateful serverless workloads. Own code end-to-end, solve distributed systems problems, and work across JavaScript, TypeScript, Rust, and C++.

The Senior Software Engineer will design and develop core modules for an AI-enabled platform, collaborating across teams and mentoring others in a fast-paced environment.

Build and own end-to-end frontend experiences for Coinbase card products across web and mobile. Ship high-scale consumer features, improve payment flow performance and SLOs, reduce latency and CX contacts, mentor engineers, and collaborate with product, design, and backend teams to deliver reliable, user-focused card functionality.

Build end-to-end fullstack features for a mental healthcare platform: design APIs and UIs, manage clinical and practice-management systems, integrate AI capabilities, and own product outcomes from schema to frontend.

Design and build reliable backend services powering clinical data, insurance billing, patient-facing infrastructure, and financial ledger systems. Scale high-integrity systems requiring idempotency, strong consistency, and pragmatic AI integration to automate provider workflows and enable personalized patient experiences.

Designs, builds, tests, documents, operates, and maintains software supporting electromagnetic warfare solutions, military exercises, and real-world missions. Responsibilities include resolving defects, supporting releases, gathering requirements, collaborating with customers and cross-functional teams, and improving development processes. The role requires troubleshooting production issues, applying Agile methods, and supporting mission-critical defense programs. Travel up to 25% is required.

Leads end-to-end development of secure, scalable customer-facing software using full-stack and cloud technologies. Designs systems, writes and reviews production code, improves reliability and performance, and guides technical decisions. Provides mentorship, code reviews, and coaching to engineers while promoting software development lifecycle practices, Terraform-based infrastructure, AWS cloud adoption, and responsible AI-assisted engineering. Collaborates with vendors and cross-functional teams to evaluate architectures and deliver resilient digital banking experiences.

Design, develop, test, and maintain Java backend services, APIs, microservices, and distributed systems supporting enterprise claims and payment solutions. Collaborate with product and business stakeholders, contribute to architecture, build CI/CD pipelines, operate containerized applications, and support production services through monitoring and troubleshooting. Apply clean code, TDD, automated testing, security, and Agile engineering practices while helping guide the platform’s technical direction.

Own and develop Arena’s public web surfaces, including the blog, marketing pages, and leaderboard UI. Build with Next.js, React, TypeScript, Sanity CMS, and the company design system. Improve performance, accessibility, SEO, structured data, internationalization, and data visualization. Create CMS models and publishing tools that enable marketing teams to ship independently while collaborating closely with designers, marketers, and engineers.

Leads software development for mission-focused cyber and defense capabilities. Guides development teams, mentors engineers, conducts code reviews, integrates databases and data-transfer protocols, implements architectural and system improvements, and builds scalable, automated digital solutions. The role requires advanced programming experience, database integration skills, and the ability to obtain a TS/SCI clearance.

Develop, prototype, integrate, and test Python-based software for missile warning/tracking missions. Contribute to containerization, testing, deployment, and provide technical guidance to team members while supporting DoD programs and maintaining high software engineering standards.