Top Senior Software Engineer Jobs

Own end-to-end full-stack feature development across React/TypeScript interfaces and Elixir backend services for spacecraft modeling, simulation, and ground-control software. Drive architecture, technical debt reduction, performance, reliability, testing, API design, and production deployment. Mentor engineers, establish coding standards, collaborate with product, design, QA, operators, and astrodynamics teams, and deliver complex data-dense, real-time applications.

Leads software architecture and development for ASML machine applications, owning complex modules from design through integration, deployment, testing, and maintenance. Provides technical direction to 6–10 engineers through code reviews, architecture reviews, mentoring, and technical planning. Develops C#/.NET applications using WPF, XAML, and MVVM, while driving quality, performance, reliability, automated testing, CI/CD, dependency management, and cross-team architectural alignment.

Provides technical leadership for designing, developing, modernizing, testing, and supporting enterprise applications. Leads full-stack Java, Spring Boot, Angular, and React engineering; architecture and code reviews; database and API design; automated testing; CI/CD and DevSecOps practices; production incident troubleshooting; observability; and root-cause analysis. Mentors engineers and collaborates across architecture, product, UX, QA, DevOps, database, and operations teams.

Design, build, and improve distributed clearing and securities-finance systems supporting brokerage products. Own projects from ideation through deployment, develop reliable APIs and integrations, refine existing infrastructure, and participate in on-call operations. The role requires strong systems fundamentals, attention to detail, financial-markets interest, and ownership of production systems handling customers’ money.

Design and maintain high-performance real-time dashboards, HMI/SCADA interfaces, streaming UIs, and post-processing tools for high-throughput sensor telemetry. Define visualization architecture, rendering standards, testing practices, and operational best practices. Collaborate with data platform, controls, and test automation teams while debugging and optimizing the full rendering-to-data stack in safety-critical, 24/7 environments.

Develop and improve high-performance software agents for Linux, Unix, and Windows across multiple processor architectures. Design systems that collect workload information, enforce network policies, and monitor container deployments. Analyze interactions among applications, processes, and operating system kernels; troubleshoot complex systems; and participate throughout the product lifecycle from design and prototyping through production deployment. Collaborate with software, data, UX/UI, and support teams in an agile environment.

Designs and develops scalable software frameworks, automation tools, and full-stack applications using Python, Bash, React, and Flask. Implements ISO 26262 safety requirements, optimizes databases, performs static analysis and code reviews, and leads Agile delivery. Provides technical mentorship, collaborates with stakeholders on certification requirements, and creates architecture and API documentation. Deploys applications using cloud platforms, Podman, OpenShift, and infrastructure-as-code tools.

Lead complex enterprise analytics software from specification through production deployment. Design resilient distributed services, implement major epics, author engineering specifications, drive testing and production readiness, and mentor product engineers. Collaborate with product, architecture, QA, engineering, and AI agents in Agile Scrum teams using SAFe 6.0 principles to build secure, observable, cloud-agnostic software for critical electrical infrastructure.

Design and maintain scalable services, APIs, distributed systems, and data pipelines for AI training data infrastructure. Own systems through design, implementation, testing, deployment, and monitoring. Lead architectural decisions, improve reliability and scalability, mentor engineers, and collaborate with AI/ML, product, and data operations teams. Contribute to CI/CD, containerization, DevOps, and cloud deployment practices.

Develop and deploy autonomy software for unmanned surface, underwater, and aerial vehicles in maritime missions. Responsibilities include motion planning, localization and tracking, safety assurance, COLREGS adherence, multi-agent coordination, distributed optimization, rigorous software testing, platform integration, deployment support, mission-log analysis, and autonomy R&D. The role also involves cross-functional collaboration, customer and demonstration support, roadmap development, and mentoring junior engineers. Travel is typically approximately 25% annually.

Develops, tests, maintains, and modernizes secure ACWS software components, APIs, integrations, and services. Implements user stories, resolves defects, performs unit testing, supports sprint and release activities, analyzes production issues, and coordinates durable technical solutions. Collaborates with architects, analysts, testers, DevSecOps teams, and stakeholders while supporting refactoring, legacy modernization, documentation, and technical debt reduction.

Develops production-quality C++ software for autonomous and semi-autonomous machine localization, positioning, navigation, and state estimation. Designs algorithms using GNSS, inertial sensors, perception systems, and filtering techniques; researches and deploys localization solutions; and supports architecture, testing, validation, documentation, functional safety, and product quality. Collaborates cross-functionally and mentors junior engineers.

Develop and lead the delivery of high-quality C++ software for FreeWheel’s cloud-based ad-serving and distributed systems. Responsibilities include designing scalable architectures, deploying and troubleshooting Linux systems, optimizing algorithms, working with Snowflake and Aerospike, reviewing code, collaborating with stakeholders and QA, documenting technical work, and mentoring junior engineers. The role requires independent judgment, strong communication, and flexibility for nights, weekends, variable schedules, and overtime.

Build and own high-performance UI features for Netflix’s TV application across streaming sticks, smart TVs, and cable boxes. Collaborate with product, design, algorithms, and engineering teams to define experiences, validate product variants through A/B testing, and deliver reliable, testable code. Lead large cross-functional projects while working with TypeScript, JavaScript, React, Redux, Node.js, GraphQL, and proprietary Jest-based automation frameworks.

Own and productionize localization, mapping, calibration, and state-estimation systems for autonomous ground vehicles operating at active airports. Responsibilities include sensor fusion, 3D mapping, calibration, online validation, diagnostics, regression testing, deployment, and safety monitoring. The role provides technical leadership across perception, planning, and platform teams while advancing autonomous operations toward driverless capability.

Design and build scalable, reliable, observable, and well-tested backend and distributed systems. Work in AI-assisted development workflows by decomposing problems, validating AI-generated outputs, and using tools such as Claude and code assistants. Contribute to architecture, data modeling, APIs, service boundaries, documentation, and technical direction while mentoring peers and collaborating across Product, UX, and Engineering.

Lead design, implementation, testing, and support of FreeWheel's high-scale video advertising platform. Own feature lifecycle, produce technical specs, write efficient code, integrate components, and maintain documentation. Provide production support, mentor junior engineers, collaborate with product and operations, and drive technical innovation and architectural decisions.

Develop analytics and deploy solutions supporting a government geolocation and data integration mission. Collaborate with customers to analyze artifacts, enrich data using corporate sources, summarize findings, and support downstream analytics and queries. The role involves leveraging disparate data to identify user activities, collection efforts, and technology information. Candidates need strong object-oriented programming skills, relevant experience, and an active TS/SCI clearance with polygraph.

Design, build, and operate secure, scalable Java and Spring Boot microservices, REST and GraphQL APIs, and event-driven integrations supporting GM mobile experiences. Deploy cloud-native services on Azure, strengthen CI/CD and DevOps automation, and improve observability, reliability, and operational health. Apply AI-enabled engineering practices, TDD, and automated testing. Collaborate across product, architecture, security, and engineering teams while mentoring engineers and contributing to technical documentation and standards.

Design and implement logistics optimization algorithms, develop predictive models, and build simulations for patient scheduling and routing in healthcare.

The Senior Software Engineer will explore AI solutions in healthcare, having experience in full-stack/backend development and startup culture.

As a Senior Software Engineer, you will design and build backend services and APIs for healthcare delivery, ensuring system reliability and integrating medical devices while leading projects and mentoring engineers.

As a Senior Software Engineer at Whatnot, you'll build AI tooling for internal use, developing workflows and infrastructure to enhance software delivery. You'll collaborate across teams to gather feedback and prioritize features in a rapidly evolving landscape.

Develop and maintain C++ systems for Teamfight Tactics on iOS and Android using Unreal Engine. Diagnose cross-platform, engine, and native mobile issues; optimize performance, memory, stability, and reliability; and influence architecture, engineering practices, tooling, testing, and release processes. Collaborate with multidisciplinary teams, provide technical leadership, mentor engineers, and participate in on-call support.

Develop and optimize software for testing, commanding, and monitoring spacecraft. Own software lifecycles through operations, configuration, maintenance, upgrades, and user support. Configure automated testing and deployment systems, maintain ground control systems, mentor junior engineers, and support spacecraft communications at launch sites and in orbit.