Top Senior Software Engineer Jobs

Build and lead the Vehicle Realism Platform for Waymo’s autonomous-driving simulator. Design scalable architectures, improve simulator reliability and reproducibility, bridge vehicle subsystems with simulation infrastructure, and deliver realistic simulation solutions across hardware platforms. Collaborate with robotics, onboard, hardware, evaluation, and simulator teams. The role requires backend development, production monitoring, systems programming, C++, and experience building products in distributed environments.

Owns core platforms that deliver autonomous driving software from development through vehicle deployment. Responsibilities include C++ build and packaging systems, CI/CD, Docker and Kubernetes infrastructure, cloud and edge services, APIs, event-driven architecture, identity and access control, PKI, mTLS, secrets management, and fleet operations. The role also involves code review, architectural design, infrastructure on-call, mentoring, and cross-team technical leadership.

Leads a software development team as technical lead and Product Owner for a large distributed Java system supporting missile defense operations. Responsibilities include architecture, development, integration, testing, performance optimization, backlog and acceptance-criteria management, stakeholder collaboration, technical problem resolution, and Agile team mentorship. The role requires onsite work, a current active Top Secret clearance, and occasional nonstandard hours during mission events.

Designs, develops, tests, and supports software prototypes and web applications for satellite communications and national security systems. Responsibilities include full software lifecycle participation, algorithm optimization, microservices and database development, stakeholder collaboration, requirements analysis, continuous improvement, and mentoring. The role is onsite in El Segundo, California and requires the ability to obtain and maintain a Secret clearance.

Senior full-stack engineer responsible for architecting, developing, deploying, monitoring, and supporting production capabilities across a React, Node.js, PostgreSQL, Rust, and Azure Kubernetes platform. The role includes delivering AI and LLM features, owning complex technical initiatives, improving reliability and security, contributing to architecture and engineering standards, partnering with stakeholders, and mentoring engineers.

Build and guide full-stack systems supporting healthcare eligibility, claims, authorizations, clinical data, integrations, and analytics. Own technical architecture, data modeling, infrastructure, migrations, reliability, standards, and technical debt across a domain. Develop core systems, improve engineering practices, mentor senior engineers, and lead technical hiring and decision-making. The role requires hands-on software development with TypeScript, SQL, React, Docker, public cloud infrastructure, and AI development tools.

Designs and develops scalable software across IoT, web, mobile, backend, and AI product teams. Responsibilities include architecting features, writing Elixir, React, and React Native code, building REST and GraphQL APIs, integrating hardware, optimizing high-volume event systems, refactoring legacy systems, conducting code reviews, mentoring engineers, and delivering secure, maintainable solutions.

Design, build, and operate financial infrastructure for ledgers, ACH and wire integrations, KYC, secure PII handling, and payment workflows. Model complex domains in relational databases, build reliable APIs, ensure correctness and auditability, manage on-call operations, collaborate with Product, Risk, and Compliance, review code, and mentor engineers.

Build and own core features for a mobile collectibles trading card app using React Native and Expo. Responsibilities include delivering polished native-feeling experiences, working with native modules and platform APIs, partnering on backend contracts, and owning performance, reliability, startup time, frame rate, and crash-free sessions. The role also involves establishing architecture and guardrails, setting technical direction, mentoring other engineers, and shipping features end to end from design through iteration.

Design, build, and maintain Stellar Core, the distributed system powering the Stellar blockchain. Responsibilities include developing scalable network components, improving peer-to-peer and processing performance, strengthening resilience and decentralization, investigating bottlenecks, authoring protocol specifications, and contributing to architecture, code reviews, and open-source engineering practices.

Design, build, and maintain Stellar Core, the distributed system powering the Stellar blockchain ledger and consensus. Develop scalable, resilient components; improve peer-to-peer networking and processing performance; investigate bottlenecks; and contribute to architecture, code reviews, RFCs, formal verification, simulations, and open-source collaboration. The role requires production C++ or Rust expertise, strong software design skills, and ownership of core subsystems.

Build and operate backend services, APIs, shared platform capabilities, and developer tooling for Handshake AI and internal AI initiatives. Responsibilities include service architecture, database design, performance, scalability, reliability, observability, and developer experience. The role contributes to LLM and agentic systems, including orchestration, evaluation, integrations, and failure handling. It also involves architectural decisions, incident response, cross-team collaboration, technical planning, code reviews, and mentoring engineers.

Design, build, and operate distributed billing systems for metering, rating, invoicing, payments, and reporting. Own medium-sized projects end to end, contribute to multi-team initiatives, ensure reliability and correctness, and partner with Product, Finance, Legal, Growth, and engineering teams. Help define billing and pricing models for AI products, participate in on-call support, improve observability, and mentor engineers.

Design, implement, test, and maintain cross-platform core libraries for CrowdStrike’s security sensor across Windows, Linux, and macOS. Own work from technical design through production validation, lead design reviews, resolve fleet-scale incidents, improve testing and reliability, collaborate across engineering teams, and mentor junior engineers. The role requires strong low-level C and C++ systems experience, cross-platform expertise, sound technical judgment, and occasional travel.

Develop, integrate, test, deploy, and sustain full-stack applications and workflow automation supporting intelligence-community mission functions. Translate requirements into applications, APIs, services, and automated workflows while participating in a secure DevSecOps lifecycle. Collaborate with platform and security engineers to deliver production-ready capabilities, including task management, correspondence, briefings, scheduling, and knowledge capture.

Build and operate full-stack, cloud-native applications for network automation and mission platforms using Python, Go, JavaScript, and TypeScript. Develop APIs, AI agents, generative user interfaces, integrations, and telemetry workflows. Contribute to CI/CD, Infrastructure as Code, containerized deployments, production troubleshooting, security, observability, and architecture. Collaborate across software, cloud, platform, product, and security teams in an ambiguous, mission-focused environment.

Designs software architecture, develops software in an Agile environment, creates automated verification tools and test procedures, and collaborates with software engineering teams. Responsibilities include developing software test plans, supporting CI/CD processes, decomposing system requirements, and contributing to the Sentinel program’s Digital Ecosystem EMAS organization. The role requires an active DoD Secret clearance, U.S. citizenship, and eligibility for Special Program Access.

Design, develop, test, deploy, and operate scalable cloud-native software, web applications, APIs, and enterprise systems. Lead architecture and technical strategy, improve reliability, security, performance, and observability, and support production incidents. Mentor engineers, conduct design and code reviews, modernize legacy systems, collaborate across teams, and drive engineering process improvements using Agile practices.

Design, develop, and maintain complex safety-critical software for nuclear energy applications. Responsibilities include software architecture, coding, code reviews, system integration, mentoring engineers, testing, debugging, performance optimization, regulatory compliance, and technical documentation. The role requires collaboration with hardware and control systems teams and may involve disconnected or containerized applications, physical security integrations, and production AI/ML features.

Design, develop, and maintain high-performance networking software using C/C++ and Python. Work across L2-L7 protocols, Linux systems, virtualized environments, and network virtualization technologies. Debug complex distributed-system issues, analyze crash files, configure and test VM-based networking, and collaborate with architecture, QA, and DevOps teams. Participate in design reviews, documentation, and mentoring while delivering scalable, reliable, production-quality software.

Build and ship robust Android features for ClassPass in a large modular codebase. Collaborate with product and design, mentor junior engineers, conduct code reviews, write technical documentation, solve complex problems, improve systems, and contribute to architectural decisions using Kotlin and Jetpack Compose.

Develop and modernize full-stack mission management and workflow automation systems, with emphasis on backend API development. Build features from customer requirements, support automation teams through code reviews and enabling functions, and migrate systems to Kubernetes infrastructure. Maintain and upgrade applications, implement security enhancements, and collaborate with developers, analysts, subject matter experts, and mission customers.

Develop and support embedded and application-level software for high-performance thermal control systems. Responsibilities include full lifecycle development, control algorithm integration, proof-of-concept studies, maintenance of existing products, application and driver deployment on Linux and Windows, and user interface programming. The role collaborates with multidisciplinary engineering teams and may involve Docker, industrial communication protocols, and high-reliability coding practices.

Develop, modernize, test, debug, and sustain mission-critical desktop analytical applications for the U.S. Navy. The role uses C++ and object-oriented, multithreaded, concurrent, and asynchronous programming techniques. Responsibilities include architecture and design contributions, legacy-system modernization, code reviews, technical documentation, software integration, deployment, and production troubleshooting within Agile Scrum and SAFe teams.

Designs and maintains full-stack software supporting patient-facing, clinical, and customer support applications. Owns backend data processing, RESTful APIs, integrations, storage architectures, and React web functionality while collaborating on Flutter mobile applications. Responsibilities include improving security controls, troubleshooting production systems, leading technical reviews, maintaining regulated development documentation, mentoring engineers, and partnering with product, clinical, quality, regulatory, and support teams.