Top Senior Software Engineer Jobs

Develop and maintain responsive, accessible front-end web applications using modern frameworks. Collaborate with UX and back-end teams, translate designs into clean code, optimize performance and accessibility, ensure cross-browser compatibility, and participate in testing and code reviews. Stay current with emerging front-end technologies and propose improvements.

Develop, test, debug, and maintain full-stack (MERN) applications; implement REST APIs, participate in Agile delivery, troubleshoot incidents, contribute to CI/CD and test automation, and collaborate on microservices, containerization, and cloud (AWS) solutions.

Design and build cloud-native, SaaS-ready services while decomposing legacy monoliths. Lead architecture, mentor engineers, implement observability, perform code reviews, and refine AI-augmented development workflows and CI/CD deployments.

Design and build scalable backend services and APIs, own infrastructure and observability, make architectural decisions, collaborate with product/design/data, and shape engineering practices and culture.

Lead and deliver end-to-end software features, refactor legacy code, architect scalable and secure systems, mentor engineers, collaborate cross-functionally, and ensure high-quality user-focused code and designs.

Lead and contribute to software design, development, integration, and release for advanced electronic defense systems (electronic warfare, secure communications, radar). Partner with program and product leads, implement software strategy and processes, perform hands-on integration testing, and support SDLC and real-time operating system development.

Design and build scalable, extensible software infrastructure for regulated mortgage servicing systems. Collaborate with Product and Design to deliver customer experiences, learn new technologies quickly, and balance technical and product requirements. Develop robust systems capable of handling complex regulations, billions of dollars in loans, and rapid growth in a fast-paced startup environment.

Design and build robust, scalable software infrastructure for a complex, regulated mortgage servicing platform. Collaborate with Product and Design to define customer experiences, learn new technologies quickly, and develop systems supporting evolving federal, state, and agency regulations. The role involves building quality applications at scale across web, mobile, distributed systems, or infrastructure domains in a fast-paced startup environment.

Design and develop payload flight software for spacecraft supporting the U.S. Space Development Agency’s Proliferated Warfighter Space Architecture. Responsibilities include requirements generation, software implementation, testing, deployment, multithreaded application design, performance-oriented programming, and algorithm deployment on size, weight, and power-constrained sensor systems using accelerator technologies.

Design and develop payload flight software for spacecraft sensor systems. Responsibilities span requirements generation, software design, implementation, testing, and deployment. The role focuses on performance-oriented embedded programming, multithreaded applications, novel algorithms, and accelerator technologies in size, weight, and power-constrained environments. The engineer will support Space Systems programs and contribute to flight software for the U.S. Space Development Agency’s Proliferated Warfighter Space Architecture.

As a Forward Deployed Software Engineer, partner with high-impact public sector customers by developing full-stack applications and providing technical guidance throughout the project lifecycle.

Lead and build software infrastructure and automation for robot testing and evaluation. Develop scripts, tools, and workflows to run repeatable tests, collect and analyze data, improve reliability, and coordinate cross-functional test execution. Set technical direction, prioritize work, unblock the team, and grow testing infrastructure and personnel for scaled deployments.

Lead design and implementation of Mercor's code search and retrieval systems: hybrid dense-code embeddings plus lexical (BM25) retrieval, candidate generation, ranking/re-ranking, model routing, query translation from natural language, indexing pipelines, evaluation/A-B testing, and technical leadership to evolve embeddings and search quality safely at scale.

Senior full-stack developer responsible for designing, developing, and delivering end-to-end software solutions using front-end and back-end languages in an Agile environment. Collaborate cross-functionally to produce production-ready systems, write and enhance source code, and apply modern architectures and tooling. Must be eligible for a Secret clearance.

As a Fullstack Software Engineer, you will build and enhance highly scalable AI-native platforms, advance both front-end and back-end systems, and ensure usability for healthcare applications. You'll work closely with engineering and product teams while directly interacting with customers to refine user experiences.

The role requires designing and developing web applications and backend systems, integrating LLMs, and ensuring quality software delivery.

The role involves building and maintaining healthcare EMR software integrations, implementing monitoring systems, and developing scalable integration frameworks. Requires direct client interaction and innovative problem-solving.

As a Software Engineer, you'll design and develop software systems for processing and managing geospatial data, with a focus on SAR imagery, collaborating with multidisciplinary teams to support U.S. government capabilities.

Lead development of Python-based tools and automation frameworks for optical transceiver validation. Automate test execution, instrument control, data collection/analysis, CMIS and EEPROM verification, and support qualification of PAM4, LPO/LRO, and coherent optics for 1.6T and 12.8T platforms.

As a Senior Quantitative Software Engineer, you'll implement and optimize Python solutions for quantitative risk initiatives, collaborating with global teams to enhance financial risk management through reliable systems.

As a Software Engineer in Data Infrastructure at Figma, you will design and manage large-scale data systems, ensuring reliability and scalability while collaborating with diverse stakeholders to build high-performance data platforms.

Develop, test, and maintain full-stack TypeScript applications; productionize AI/ML capabilities; build CI/CD pipelines; collaborate with data science and stakeholders; troubleshoot defects; ensure scalable, reliable software in Agile environments.

Develop analytics from cyber and SIGINT data, using Java and big data technologies. Collaborate with customers to create prototypes and improve data representation.

Design, build, and maintain backend systems and scalable web APIs for an EM simulation platform. Integrate hybrid cloud and on-prem HPC, optimize HPC clusters, improve data management, implement containerized orchestration, and collaborate with EM and infrastructure teams to enhance schedulers, pipelines, and developer tooling.

The Software Developer designs, develops, tests, and maintains software applications, collaborates with teams, and participates in Agile methodologies.