Top Senior Software Engineer Jobs

Build and improve Mozilla’s Firefox Add-ons platform, including moderation pipelines, reviewer tools, DevHub, and full-stack features. Develop React/TypeScript frontends and Django/MySQL backends, improve reliability through Google Cloud deployments, monitoring, and incident response, and create observability and security systems. Collaborate with product, design, QA, reviewers, developers, and open-source contributors while responding to platform incidents and supporting ecosystem safety.

Own end-to-end system design, API contracts, technical direction, and cross-team delivery for platform engineering systems. Coach engineers through reviews and pairing while remaining hands-on with coding, operations, monitoring, incident response, and on-call responsibilities. Improve CI/CD, observability, testing, and documentation. Relevant domains include data engineering, automation, developer tooling, AI enablement, and product engineering.

Build and maintain highly scalable ingestion pipelines and indexing solutions for semantic search and LLM grounding across enterprise M365 data. Design, implement, test, and operate low-latency, high-availability services while ensuring security, compliance, and integration with other engineering teams.

Build, enhance, modernize, test, deploy, and sustain enterprise Java and Spring Boot applications supporting DoD financial and program management. Responsibilities include full-lifecycle feature ownership, Oracle schema and SQL development, Angular contributions, CI/CD pipeline delivery, security scanning, defect investigation, architecture participation, code reviews, and secure cloud deployment. The role requires evaluating existing systems, applying sound technical judgment, and meeting federal security and compliance requirements.

Build and sustain enterprise Java applications for DoD financial and program management. Own capabilities across requirements, architecture, API development, database design, testing, CI/CD deployment, security, and production sustainment. Work across Spring Boot, Angular, Oracle, SQL, and cloud environments while investigating defects, reviewing code, using AI-assisted tools responsibly, and contributing to agile delivery. Seven or more years of software development experience, a technical bachelor’s degree or equivalent experience, Security+ certification, U.S. citizenship, and Secret clearance eligibility are required.

Own the architecture and development of data-intensive web applications powering customer insights. Provide hands-on technical leadership, mentor engineers, conduct architecture and code reviews, resolve complex distributed-system issues, and deliver performant, maintainable data products. The role involves ETL and/or RAG development, full-stack work across React, TypeScript, Next.js, PostgreSQL, and C#/.NET, with opportunities to operate cloud infrastructure and observability systems.

Develop and maintain enterprise Java/JEE applications throughout the full software development lifecycle. Responsibilities include database architecture and SQL performance tuning, REST/SOAP and distributed service integration, Kafka-based event systems, security implementation, monitoring, JVM optimization, troubleshooting, documentation, code reviews, and collaboration with infrastructure, database, and business teams. The role is onsite five days per week near Austin, Texas, supporting semiconductor operations.

Build and own software for marina operators and boaters across reservations, payments, CRM, work orders, accounting integrations, and mobile applications. Responsibilities span scoping, design, implementation, deployment, maintenance, and improving a legacy system handling live payment traffic. The role requires full-stack development, AI-assisted engineering, product judgment, clear communication, and ownership of customer outcomes in a lean team.

Designs, develops, integrates, and verifies complex embedded real-time software for mission-critical electronic platforms. The role independently solves technical challenges, makes program-level decisions, leads software development efforts, and collaborates with systems, hardware, test, program management, and external stakeholders. Responsibilities span software architecture, implementation, integration, verification, lifecycle compliance, technical representation, and delivery of maintainable, high-quality solutions.

Designs, develops, tests, deploys, and maintains big data software systems processing network, DNS, and web content data. The role requires Java or Python development, distributed systems, data storage, performance tuning, testing automation, CI/CD, cloud-native architectures, incident response, and technical leadership in an Agile environment.

Design and evolve reliable edge computing systems connecting cameras, sensors, deployed hardware, and cloud infrastructure. Responsibilities include architecture, distributed systems, diagnostic tooling, remote troubleshooting, sensor-fusion problems, code reviews, technical design discussions, and mentoring engineers. The role requires hands-on systems expertise across Linux, networking, hardware, and software, with ownership of ambiguous technical initiatives from conception through delivery.

Design, develop, verify, and maintain software for CT imaging systems, including scanner desktop applications, clinical workflows, integrations, and platform services. Lead complex feature development, architecture discussions, testing, debugging, root-cause analysis, and corrective actions. Apply Agile, CI/CD, DevSecOps, cybersecurity, and medical-device quality practices. Improve automation, performance, reliability, and code quality while mentoring junior engineers and owning features throughout the full software lifecycle.

Provides hands-on technical leadership modernizing legacy .NET systems into scalable, cloud-native applications. Designs APIs, modular services, data-access patterns, and resilient architectures for high-volume operational workflows. Leads technical discovery, improves observability, security, performance, and maintainability, and mentors engineers through design and code reviews. Collaborates with Product, Architecture, Infrastructure, Security, Data, and Operations teams to deliver reliable, compliant solutions.

Designs, develops, modernizes, and supports enterprise applications using Angular, Blazor, C#, .NET, REST APIs, and Azure. Responsibilities include cloud modernization, production support, incident response, code reviews, CI/CD support, architecture, troubleshooting, and mentoring junior engineers. The role collaborates with business analysts, product owners, QA professionals, and engineering teams to deliver reliable, maintainable business-critical software.

Develop core Roku OS application framework features and scalable services using C++ and embedded Linux. Collaborate with product, design, platform, and release teams; maintain and test applications; diagnose platform issues; design APIs and software solutions; and implement functional and integration tests.

Lead full‑stack development of customer‑facing features, own product lifecycle from design to release, build scalable AI‑enabled back‑end systems on AWS, improve CI/CD and testing, collaborate with product, design, and ML researchers, and ensure security and privacy best practices.

Build large-scale advertising technology, reporting tools, data pipelines, REST services, and cloud-based systems. The role spans UI through infrastructure and deployment, requiring DevOps practices, distributed computing, big data processing, and collaboration with customers, engineering teams, and business partners. The engineer will participate in architecture discussions, influence product roadmaps, and own end-to-end technical solutions.

Develop and operate large-scale AWS cloud services powering Roku content discovery. Design low-latency, resilient systems; select databases and storage across regions; optimize cloud costs; implement Redis and Memcached caching; and monitor, deploy, troubleshoot, and maintain production systems end to end.

Lead modernization of legacy .NET applications into scalable, cloud-native services supporting auction, logistics, payments, titles, and yard operations. Design APIs and domain-oriented architectures, improve reliability and observability, establish engineering standards, implement secure application patterns, and mentor engineers. Collaborate with Product, Architecture, Infrastructure, Security, Data, and Operations teams on complex technical initiatives.

Leads platform architecture and cross-company engineering initiatives for Sentry. Responsibilities include translating business strategy into scalable technical designs, aligning technical roadmaps, driving cross-functional projects, reviewing architecture, mentoring senior engineers, and improving system scalability and operational quality. The role requires deep distributed systems and cloud infrastructure expertise, including Kubernetes, Terraform, Kafka, streaming frameworks, databases, storage, and caching.

Design, develop, test, deploy, and maintain scalable software applications. Responsibilities include writing quality code, troubleshooting production issues, contributing to architecture and technical direction, participating in the full software development lifecycle, mentoring junior engineers, and optimizing application performance, scalability, and security.

Develops and maintains software solutions across full-stack applications and infrastructure. Responsibilities include hands-on Java and Python coding, Kafka and API development, database work, CI/CD pipeline maintenance, testing, troubleshooting, system design, and translating business requirements into technical solutions. Works in Agile teams, follows security and development standards, supports production systems, estimates project work, and mentors junior associates.

Design, develop, and maintain scalable GraphQL APIs and data solutions using TypeScript, cloud platforms, databases, and caching technologies. Lead multi-product development, automated testing, DevOps, CI/CD, code reviews, troubleshooting, and project delivery. Collaborate with architects, product managers, designers, and engineers while providing technical leadership and mentorship. Apply modern infrastructure, containerization, workflow, and software engineering practices to ensure reliable, maintainable, high-quality systems.

Designs and builds highly scalable backend and data systems supporting Uber’s global marketplace. Responsibilities include architectural leadership, solving low-latency and high-correctness problems, leading organization-wide engineering projects, managing incidents and on-call operations, collaborating cross-functionally, and mentoring engineers. The role requires advanced SQL and data warehousing expertise, distributed systems experience, and the ability to drive large-scale technical initiatives.

Develop and architect large-scale software solutions across Salesforce, full-stack applications, APIs, cloud platforms, DevOps, test automation, and generative AI. Advise business partners, guide global engineering teams, create platform roadmaps, establish scalable technology standards, and assess AI use cases for risk, privacy, security, compliance, and business value. Serve as a technical liaison and thought leader while delivering production-ready software solutions.