Top Software Engineer Jobs in Madison, WI

Lead design and execution to modernize billing, license management, and financial systems from a PHP monolith to a scalable service-oriented architecture. Architect invoicing, payments, reconciliations, and integrations with ERP/payment platforms, ensure data integrity, compliance, observability, and cross-functional alignment with Finance and Operations.

Senior backend engineer responsible for designing and implementing scalable, high-availability backend services for investment and financial products. Work primarily on backend APIs, integrations with financial institutions, databases, testing, troubleshooting production issues, and contributing across the stack while focusing on performance, security, and maintainability.

The Lead Software Engineer oversees the design and delivery of foundational services for real-time recommendations while mentoring teams and ensuring robust, auditable systems using advanced state management and transactional patterns.

The Lead Software Engineer designs and maintains a high-performance decision engine, focusing on low-latency services and robust API development while ensuring compliance and observability. Responsibilities include managing rules execution, performance engineering, and leading technical reviews.

The Senior Software Engineer will design and implement stateful services for real-time decisioning systems, focusing on state machines and reliability in distributed environments.

Design, build, and operate high-performance distributed authentication and real-time inference services. Implement scalable cloud APIs, distributed training and deployment pipelines, CI/CD, observability, and reliability practices. Lead incident response, on-call rotations, staged rollouts, and post-incident improvements while managing model lifecycle, data quality, and production monitoring.

Define technical vision and implement scalable microservices and core platform features. Lead API and data-model design, develop backend solutions with automated tests, drive CI/CD and migration from monolith to microservices, collaborate cross-functionally, and mentor engineers.

As a Principal Software Dev Engineer, lead full-stack engineering, oversee complex initiatives, mentor engineers, and align technical strategies with business goals to enhance content management systems.

Design and implement scalable backend systems and frontend applications for video-language models in GovCloud, ensuring integration, compliance, and high performance.

As a Senior Software Engineer, you'll develop scalable backend systems and optimize web and mobile applications, lead architecture discussions, manage APIs, and mentor junior engineers.

Develop and implement scalable solutions, collaborate with teams using Agile, and mentor junior engineers while ensuring security and performance.

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

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.

Lead development of SDR embedded software for LEON3 softcore processors: design and implement embedded C/C++ and Python firmware, autoboot FPGA/softcore loading, integrate SpaceWire and other interfaces, manage RTEMS cross-compilation, perform HW/SW integration, debugging, verification, and maintain requirements traceability and documentation.

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 II at Bitsight will build and operate large-scale data pipelines, helping to enhance the Security Ratings product through software development and integration of new data sources.

You will enhance client onboarding by integrating with core provider APIs and improving product services, while ensuring clean, documented code.

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.

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.

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.

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.

Lead frontend delivery for ticketing across React web and React Native mobile: design and ship resilient purchase, redemption, and event-day features, improve observability, testing, reliability, and mentor engineers while collaborating with product, design, and backend teams.

Lead full stack engineering projects, collaborate with teams, troubleshoot production issues, mentor engineers, and ensure project alignment with business goals.

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.