Top Senior Software Engineer Jobs

Lead end-to-end engineering initiatives across the platform: design and build scalable backend services, APIs, and frontends; prototype quickly; iterate from user feedback; apply AI tooling to improve velocity; own production systems and architectural decisions.

Design, develop, test, deploy, and maintain backend systems for StubHub's Sponsored Listings ad platform. Provide technical leadership, translate product requirements into engineering plans, ensure stability and reliability, own projects end-to-end, and mentor junior engineers.

Design, develop, test, deploy, and maintain backend and frontend systems for StubHub's supply platform. Build scalable, reliable services and APIs to manage seller inventory, meet SLAs, reduce operational costs, and protect against fraud and legal constraints. Mentor engineers and drive technical and product strategy.

Develop and maintain R&D and production software for next-generation radar products, integrate software on COTS hardware, support deployed capabilities for U.S. and international customers, and collaborate on-site in Los Angeles following Agile, CI, and TDD practices.

Lead technical direction for the Growth team at Sanity.io, focusing on scalable solutions, mentoring engineers, and making data-informed architectural decisions.

Develop responsive, user-facing web application components for a centralized AI/ML annotation and model repository. Translate UI/UX designs to interfaces, integrate with backend services via REST/GraphQL, implement performance and security best practices, and author frontend tests and automation. Participate in Agile development and collaborate with end users and designers while maintaining operational systems.

The Senior Engineer will participate in product evaluations, make architectural decisions, write clean code, and work with various technologies in an Agile environment.

You will develop and maintain components of the LLVM based toolchain, collaborating with the community while ensuring platform-specific optimizations and tests.

Design, develop, and support scalable cloud-native full-stack applications using Node.js/TypeScript, Svelte, and Rust. Manage PostgreSQL databases, Linux servers, Kubernetes/ECS deployments, and AWS services. Provide technical leadership, mentor engineers, drive architecture and CI/CD, troubleshoot production issues, and collaborate with cross-functional teams to deliver reliable SaaS features.

Design, develop, and test complex web software and systems. Provide technical guidance, participate in architecture decisions, conduct code reviews, ensure code quality, mentor team members, and collaborate cross-functionally to deliver high-quality solutions.

The role involves architecting and implementing LLM-powered tools to enhance developer productivity, automate mundane tasks, and establish best practices for AI integration in development processes.

Translate requirements and designs into production code using industry-standard techniques. Analyze and resolve issues in existing systems, collaborate with cross-functional teams, and contribute to software development and maintenance.

Design, build, test, deploy and maintain full-stack features for seller-facing systems. Collaborate on architecture and best practices, own projects end-to-end, and mentor junior engineers to improve team capability.

The Fullstack Engineer will lead product development, contribute to team dynamics, and utilize a diverse tech stack, prioritizing curiosity and ownership.

Build and maintain backend services for the Training Data Storefront (TDS): design and implement features, RESTful APIs and streaming services, optimize performance, use Python, Docker, Kubernetes and AWS, follow SDLC best practices, mentor teammates, and work directly with end users in an Agile environment.

Design, develop, and maintain full-stack web applications and scalable backend services for a DoD/IC Training Data Storefront. Implement responsive frontends, Python-based APIs, containerized deployments on AWS, and ensure performance, security, and test coverage while collaborating in an Agile team.

Design and implement advanced digital signal processing and machine learning algorithms for radar, EW, SIGINT, and RF geolocation; prototype and transition DSP/ML models to real-time, field-ready software across on‑premises and cloud environments in support of US intelligence and defense missions.

Build and maintain Python-based services and internal tools to support verification, validation, testing, and evaluation workflows for DoD and Intel missions. Design scalable, testable software systems, collaborate on architecture and observability, support containerized deployments and CI/CD automation, and mentor engineering teammates in mission-critical environments.

Build and maintain backend and infrastructure software for ground navigation: control plane, workflow orchestration, databases, product repositories, ingestion pipelines, observability, CI/CD, and operator tools. Integrate orbit determination, telemetry, reference data, and validation into repeatable per-spacecraft workflows and collaborate with astrodynamics, flight software, mission operations, and systems teams to operationalize navigation products.

Design, develop, test, and deliver complex software systems. Lead small teams, mentor junior engineers, participate in architecture decisions, conduct code reviews, and integrate AI and cloud solutions into products.

Own and maintain the core application suite including ASP.NET MVC apps, manage SQL Server databases, administer Azure production environments, troubleshoot and deploy patches, and drive incremental modernization and performance/security improvements across development, staging, and production.

The role involves developing and optimizing core components of the Flow blockchain protocol, focusing on performance, scalability, and reliability, while also ensuring interoperability with the web3 ecosystem.

Develop R&D and production software for next-generation radar products, integrate software with COTS hardware, support deployed capabilities for U.S. and international customers, and work on-site with engineering teams to advance product features and reliability.

Design, build, and ship end-to-end product features focused on search and ranking. Improve profile search via new filters, data sources, and LLM-based features (including fine-tuning and feedback loops). Collaborate with founders, move quickly, own projects, and work across Next.js/React, Node.js, OpenSearch, AWS, SQS, and Spark.

Design, implement, and maintain production-grade Python services and internal tools; lead technical design for scalable, available cloud/containerized systems; mentor junior engineers; support DevSecOps, testing, security, observability; adopt AI-assisted workflows and contribute to AI/ML or data-driven systems when applicable.