Top Senior Software Engineer Jobs

Build and maintain high-scale localization platform interfaces, workflows, APIs, and services across the full stack. Develop expert React UIs with JavaScript or TypeScript, design resilient low-latency services, model data, and collaborate with design, product, and engineering teams. The role focuses on automating localization operations for internal users and external vendors, with opportunities to apply AI and LLMs to production workflows.

Develop scalable, secure Azure Data services for air-gapped environments. Responsibilities include software design, coding, testing, deployment automation, telemetry integration, compliance, live-service operations, incident response, reliability improvements, and postmortem collaboration. The role supports highly secured government and regulated-industry customers and requires maintaining an active TS/SCI clearance with polygraph eligibility.

Build and operate shared cloud infrastructure and backend services using Java, Redis, Docker, Terraform, and AWS. Design scalable, resilient systems; evaluate and roll out common frameworks; conduct code reviews; write tests; monitor and troubleshoot services; optimize performance; and mentor junior engineers. Collaborate with architects, QA, product, security, and operations teams while supporting high-scale, multi-tenant deployments.

Designs and builds scalable, resilient distributed systems and applications using .NET, C#, microservices, REST APIs, cloud platforms, containers, and DevOps practices. Responsibilities include architecture, coding, code reviews, reusable components, monitoring, continuous delivery, infrastructure as code, cross-functional collaboration, mentoring engineers, and improving engineering processes.

Design, build, and operate scalable backend services for a digital mortgage platform using Node.js, TypeScript, PostgreSQL, MongoDB, AWS, and Docker. Responsibilities include API and data architecture, cloud deployment, reliability and security, production troubleshooting, performance optimization, observability, and CI/CD collaboration. The role leads technical design and code reviews, mentors engineers, coordinates with global teams, and owns major engineering workstreams.

Develop and support high-volume, mission-critical web applications across the full software development lifecycle. Build with TypeScript, JavaScript, Next.js, and SQL; deploy and operate applications in Microsoft Azure; use AI-assisted development tools; troubleshoot complex technical issues; make architectural decisions; and mentor other engineers. The role requires multi-tier system development, database optimization, Agile collaboration, and proactive delivery of reliable, high-quality software.

Develop and deliver high-volume enterprise applications across the full software development lifecycle. Design, code, test, debug, optimize SQL solutions, troubleshoot complex issues, contribute to scalable architecture, collaborate with technical and business stakeholders, and mentor other developers. Work independently while participating in Agile development and production implementation.

Design, build, and operate large-scale observability services for monitoring, logging, alerting, tracing, metrics, and real-time data processing. Own distributed tracing, data collection, cloud-native infrastructure, AI workflow instrumentation, and AI-driven anomaly detection. Partner with product teams on SLOs and production readiness, evaluate emerging technologies, maintain data quality, and participate in on-call support.

Develop and maintain internal sales and manufacturing applications using C# and .NET. Implement new features, fix bugs, improve usability, simplify workflows, and ensure solutions meet business requirements. The engineer will work independently on medium to large projects, support existing in-house systems, and use SQL Server, Entity Framework, CI/CD tools, and deployment platforms. This is an on-site role.

Develop modular test, automation, hardware-interaction, and analysis software for spacecraft and launch vehicle components. Build factory automation, drivers, web interfaces, and firmware; analyze test data against acceptance criteria; troubleshoot software-hardware failures; and manage project milestones for reliable production test systems. The role works cross-functionally with hardware, manufacturing, and engineering teams and may require extended hours and weekends.

Own and evolve enterprise AWS infrastructure, governance, security, identity, networking, and shared platforms. Build and operate full-stack services in TypeScript and Python, automate infrastructure and delivery, improve monitoring and reliability, manage incidents and on-call operations, and establish audit-ready controls. Partner across engineering and IT, improve production readiness, and mentor engineers while delivering secure, scalable, low-blast-radius systems.

Develop and sustain mission-critical software and systems for a U.S. Government customer. The role requires strong software engineering expertise, AWS and back-end development skills, collaboration, independent work, and effective communication. The position supports a large government contract and requires an active or reinstatable TS/SCI clearance with polygraph, U.S. citizenship, and extensive professional experience. It is based in Hanover, Maryland, with partial telework potentially available after acclimation.

Develop and sustain mission-critical software and systems for a U.S. Government customer. The role requires full-stack Java and Angular experience, collaboration with engineering teams, independent work, and strong communication. Candidates must hold an active or reinstatable TS/SCI with Polygraph clearance, be U.S. citizens, and have 14 or more years of software engineering experience plus a relevant bachelor’s degree or approved experience substitution.

Build, own, deploy, and operate backend services and APIs powering Mozilla products. Responsibilities include backend development, cloud infrastructure collaboration, monitoring and alerting, production support, incident response, releases, security and privacy reviews, API design, code reviews, and mentoring. The role requires end-to-end service ownership, on-call participation, and maintaining reliable production systems.

Build and own backend services for Mozilla’s Ecosystem Services, including server-side logic, APIs, distributed systems, cloud infrastructure, monitoring, deployments, and production reliability. Participate in on-call support, incident response, releases, security and privacy reviews, code reviews, and cross-functional collaboration. Mentor junior engineers and drive improvements in quality, testing, and engineering processes.

Develop and sustain mission-critical software and systems for a U.S. Government customer. Responsibilities include backend Java development, REST API and service architecture, database integration, debugging, code reviews, automated testing, and Agile collaboration. The role may also involve distributed systems, CI/CD, DevOps technologies, cloud platforms, containerization, and technical problem-solving. An active or reinstatable TS/SCI clearance with polygraph and U.S. citizenship are required.

Build and own full-stack features across patient, clinician, and operational healthcare products. Responsibilities include architecture, scalable coding, testing, CI/CD, code review, technical discussions, stakeholder collaboration, and mentoring. The role requires daily use of AI coding tools and ownership of projects from ideation through rollout. Experience with healthcare, EHR integrations, regulated domains, or consumer startups is beneficial.

Lead frontend and full‑stack projects across Marimo's open-source ecosystem. Design simple, powerful editor experiences, build performant data visualizations and editor extensions, engage with the community, triage issues, and balance community needs with product roadmap.

Define the architecture strategy for compliant computation and storage across the Bing Search platform. Lead distributed storage and data processing architecture at petabyte scale, establish privacy, security, governance, residency, retention, and compliance standards, and translate regulatory requirements into technical capabilities. Drive cross-organizational modernization initiatives, influence senior stakeholders, develop multi-year roadmaps, evaluate emerging technologies, and mentor senior engineers and architects.

Lead design and implementation of Pinterest's exabyte-scale data lake storage and metadata systems. Drive architecture and execution for scalable storage features supporting large ML/AI workloads, collaborate across data/ML/infrastructure teams, and contribute to open-source projects (Iceberg, Spark, Flink).

Build and scale user-facing desktop and mobile web features for millions of users. Own product development from prototyping and A/B testing through architecture, implementation, and launch. Collaborate with product managers, designers, and backend engineers; advocate for user needs; write reliable, maintainable code; mentor teammates; lead code reviews; and use AI thoughtfully while validating its outputs.

Develop native applications for iPhone, iPad, Apple TV, and Apple Vision Pro. Lead feature development across the application lifecycle, write well-tested and performant code, resolve production issues, improve team processes, and collaborate on sustainable architectures. Mentor engineers through code reviews and pair programming, guide agile delivery, and present solutions to technical and non-technical stakeholders. Integrate backend systems, web services, and third-party software, with AVPlayer and video playback experience preferred.

Build and enhance ABC News direct-to-consumer client applications for Roku streaming devices and smart TVs using BrightScript and SceneGraph. Develop onboarding, browsing, analytics, video playback, and UI features; create reusable components and utilities; optimize performance across devices; and collaborate with Roku, design, SDK, backend, mobile, and product teams. Contribute to JavaScript, React, Node.js, build tooling, AWS, and DevOps systems while supporting hardware, firmware, and certification efforts.

Design, build, deploy, and operate cloud infrastructure and scalable I/O systems for scientific computing, physics simulations, AI workflows, and data-intensive workloads. Optimize compute, storage, and network architectures across CPU and GPU environments. Develop algorithms, debug systems and third-party code, and improve performance across distributed systems, operating systems, kernels, compilers, and parallel-processing frameworks while collaborating independently across teams.

Own the design, development, and automation of Coinbase’s routing infrastructure connecting services to Kubernetes backends. Build scalable capabilities using Envoy, Istio, Ambient Mesh, and SPIFFE; improve routing latency, reliability, and performance; enhance developer tooling with responsible AI; and collaborate with security, reliability, and observability teams to resolve complex distributed-systems issues.