Top Senior Software Engineer Jobs in Madison, WI

Lead architecture and ship complex full-stack features across the stack, mentor engineers, partner with Product and Clinical teams, reduce technical debt, and integrate AI tools to improve mental healthcare outcomes.

You'll build and expand a privacy-first backbone for healthcare, develop tools for customer engagement, and work iteratively with the team.

The Lead Software Engineer designs and develops application modules, enhances company productivity, writes tests, and collaborates on IT initiatives.

Design and build backend services and public APIs for Chainguard's platform, ensuring quality and reliability while collaborating with cross-functional teams.

Design, develop, and maintain software in a Java environment. Collaborate with cross-functional teams, troubleshoot complex issues, and optimize performance.

As a Senior Software Engineer, you will build and maintain data connectors for ClickHouse, ensuring seamless integration with JVM-based applications while collaborating with the open-source community and internal teams.

Design and implement backend systems and APIs, scale cloud-native systems, define CI/CD best practices, and engage with community contributors to enhance observability tools.

The Senior Software Engineer will develop and optimize systems for aerospace communications, manage project priorities, and contribute to various technical initiatives.

The Senior Software Engineer will develop and optimize systems for Aalyria's Spacetime platform, focusing on API development and wireless network algorithms.

The Senior Software Engineer will develop and maintain full stack applications at Polly, utilizing various technologies for web and mobile platforms, mentor teammates, and collaborate with product teams.

The Senior Software Engineer will design, develop, and optimize backend services, integrating with AWS and Kubernetes while managing cloud infrastructure and databases.

Lead design and implementation of secure, scalable backend services and APIs for a classified CIaaS platform. Architect, build, and automate cloud-native systems (AWS/GCP), mentor junior engineers, drive quality/security improvements, and work with product and customers on integrations.

Lead development of AI-powered full-stack applications, mentor engineers, define technical direction, build performant front-end and scalable backend services, integrate LLMs/RAG, and establish engineering best practices for production AI workflows.

The Senior Software Engineer will design, develop, and maintain backend applications and systems, mentor junior engineers, and engage with stakeholders to deliver quality solutions.

Responsible for architecting, developing, and maintaining full-stack applications. Collaborate with teams, participate in design discussions, and utilize AI coding tools.

As Staff Software Engineer at Twilio Stytch, you'll build and maintain scalable identity platforms, collaborating with leadership and mentoring engineers while ensuring security and performance.

Design, develop, and deliver scalable backend systems and components using .NET 10 and C#. Build and maintain databases and messaging infrastructure (PostgreSQL/SQL Server, RabbitMQ), deploy with Docker and AWS, apply DDD and ORMs, triage/prioritize work, and contribute to distributed, event-driven architecture with emphasis on reliability and idempotency.

Design and implement new search features and fixes in Elasticsearch, invent or implement algorithms/data structures, collaborate with a distributed team, contribute to Lucene, and build scalable search functionality for serverless platforms.

As a Senior Software Engineer at PerfectServe, you'll design, build, and maintain high-quality code for healthcare communication systems, mentoring junior engineers and collaborating across teams to improve patient care and clinical workflows.

Develop and maintain scalable, secure browser extension features using JavaScript/React/TypeScript. Write tests (Jest/TDD), collaborate with product and design, optimize performance and security, refactor and fix bugs, and uphold code quality through reviews.

Design and implement cross-platform features for KeeperChat (desktop, mobile, web). Build and maintain .NET/C# MAUI clients and React web UI, optimize performance and reliability, participate in code reviews, collaborate with product/design/backend teams, and mentor junior engineers while upholding security and code quality.

The Senior Software Engineer will develop features using TypeScript, React, and Node.js, enhance system performance, and collaborate closely with a team to deliver impactful solutions.

Architect and implement scalable React/TypeScript user interfaces for web and Electron desktop apps. Integrate native modules (C++/Objective-C), work with REST APIs under zero-knowledge principles, optimize performance and accessibility, lead code reviews, mentor engineers, and participate in CI/CD and automated testing to deliver secure, high-quality features.

Lead design and implementation of health data products, mentor engineers, own multiple projects, and develop scalable data solutions using modern technologies.

The Senior Software Engineer will lead development, mentor engineers, and create data solutions using TypeScript, React, and Python. Responsibilities include designing applications, driving innovation, and ensuring high-quality user experiences.