Top Software Engineer Jobs in Milwaukee, WI

Develop software in Go and Python, review code, write design documents, and build reliable shared platforms and services for critical government systems. The role requires independent project ownership, strong engineering practices, and the ability to ramp quickly in complex environments. Work is remote-first but must be performed within the United States or its territories.

Build and architect Alpaca’s high-performance algorithmic trading platform. Responsibilities include writing backend and frontend code, designing distributed and highly available systems, optimizing low-latency and high-throughput performance, and developing scalable databases, messaging systems, concurrency controls, and service-oriented architectures. The role also involves making critical platform decisions and potentially contributing to order and risk management, trading systems, observability, cloud infrastructure, and financial ledger capabilities.

Develop, test, document, and support software applications and integrations. Perform unit, regression, security, and load testing; remediate application security issues; analyze system impacts; support monitoring and on-call operations; assist with architecture, deployments, estimates, and technical documentation. Build scalable, maintainable solutions and reporting dashboards while collaborating with security teams, teammates, and business partners.

Develops and optimizes Azure HPC and AI platform software supporting GPU-based training and inference workloads. Responsibilities include hardware/software integration, device virtualization, performance analysis, debugging, coding, architectural design, on-call support, issue resolution, and cross-team collaboration. The role improves scalability, reliability, test coverage, and performance across Azure infrastructure and AI training services.

Owns the design, development, testing, deployment, and maintenance of production software. Builds C#/.NET backend services, Angular web applications, and .NET MAUI mobile apps; optimizes SQL Server databases; resolves production issues; improves reliability, security, performance, and observability; writes tests and documentation; participates in code reviews; and translates ambiguous business needs into maintainable technical solutions.

As a Fullstack Software Engineer, you'll design, develop, and maintain scalable frontend and backend systems while collaborating across teams.

Build and validate challenging Codebase Q&A tasks for AI agents using production Go repositories. Responsibilities include exploring unfamiliar codebases, understanding runtime behavior and history, rewriting engineering questions, refining rubrics and foils, running validation workflows, documenting tasks, and responding to expert review. Work is fully remote, asynchronous, and paid per approved task.

Leads the design, development, testing, debugging, deployment, and maintenance of complex COBOL mainframe applications supporting Medicare claims processing. Provides technical leadership, estimates, troubleshooting, documentation, client communication, and mentorship within an Agile team. The role requires advanced expertise in COBOL, JCL, CICS, TSO, VSAM, Medicare claims systems, DevOps/DevSecOps processes, and rigorous software development practices.

Build and validate reinforcement-learning tasks for AI agents exploring unfamiliar C repositories. Responsibilities include investigating runtime behavior, rewriting engineering questions, refining rubrics and foils, running validation workflows, documenting solutions, and addressing expert review. Work focuses on production systems such as PostgreSQL, Redis, OpenSSH, OpenSSL, and other foundational C codebases.

Design, develop, test, and maintain secure, scalable software applications and backend services for federal modernization initiatives. Build Java and Groovy services, REST and GraphQL APIs, database integrations, and distributed systems. Collaborate with engineering, DevSecOps, infrastructure, product, and delivery teams while contributing to CI/CD, automated testing, cloud adoption, troubleshooting, documentation, and application modernization.

Lead a development team while remaining hands-on in full-stack engineering. Design, build, test, deploy, and support secure web applications using C#/.NET, Angular, databases, and AWS. Drive cloud migrations, architecture, CI/CD automation, application security, troubleshooting, performance and cost optimization. Mentor developers, establish engineering standards, lead technical delivery, and collaborate with product, data, DevOps, and architecture teams.

Develop, test, and maintain enterprise platform software across the full SDLC. Build user interfaces with Angular, React, Blazor, and WPF; develop RESTful APIs and data access logic; write unit tests; participate in code reviews; debug defects; and collaborate with Product, QA, and engineering teams. The role uses C#, .NET, ASP.NET, SQL, Git, CI/CD, and Azure-related technologies while following security and compliance practices.

Build and validate challenging codebase-exploration tasks for AI agents using production Python repositories. Responsibilities include investigating runtime behavior and issue history, rewriting questions, refining rubrics and foils, running validation workflows, documenting solutions, and addressing expert review. The role is fully remote, asynchronous, contract-based, and task-paid, with work performed in a dedicated Studio environment.

Develop scalable platforms, services, and internal tools for Revenue Cycle Management, supporting payments, claims submission, and operational workflows. Partner with engineering, product, design, operations, and business stakeholders to improve efficiency, reliability, and cost effectiveness. Drive software development through planning, execution, measurement, maintenance, and continuous improvement while supporting responsive, secure, and highly available systems.

Own commercial navigation features end to end across mobile, backend, and web surfaces. Build reliable, customer-facing navigation experiences for commercial fleets despite poor connectivity, dynamic schedules, and changing routes. Define product priorities and success metrics, ship maintainable and tested code, improve observability, and collaborate with product, design, Maps, Telematics, and adjacent engineering teams. The role requires strong customer focus, technical depth, and the ability to make practical tradeoffs in ambiguous problem spaces.

Designs and develops complex, full-stack advertising software solutions using Go/Python and AWS. Leads architecture, cloud deployment, testing, CI/CD, performance optimization, monitoring, and production releases. Uses Kubernetes, Snowflake, SQL, Linux, and observability tools. Contributes to technical roadmaps, manages cross-team dependencies and risks, and mentors junior engineers within Scrum and Kanban teams.

Senior frontend-focused software engineer responsible for authentication, verification, and fraud experiences across web, mobile, and backend systems. The role owns team goals, designs and delivers highly available systems, collaborates with product and design partners, improves engineering standards, supports operations and on-call efforts, and mentors engineers. Candidates should have strong web application architecture experience, proficiency with React or Vue and JavaScript or TypeScript, and excellent communication skills.

Design, build, and operate scalable distributed systems for real-time restaurant payment and financial workflows. Responsibilities include architecting reliable services, protecting sensitive financial data, improving observability and production performance, debugging distributed systems, participating in on-call rotations, applying AI-assisted engineering tools, collaborating cross-functionally, and mentoring engineers.

Build and operate foundational developer infrastructure across CI, build systems, deployment orchestration, and test platforms. Improve build speed, deployment safety, test reliability, observability, and engineering productivity at scale. Own services from architecture through production, including SLOs and on-call operations. Lead cross-functional technical projects, partner with engineering teams, mentor engineers, and shape platform strategy.

Build and own automation-first quality engineering across Flutter web and desktop applications and FastAPI/gRPC backend services. Responsibilities include developing unit, integration, contract, API, visual regression, and resilience tests; implementing AI-assisted test generation and exploratory workflows; establishing observability, reliability metrics, test data strategies, defect triage, and CI/CD processes; and partnering cross-functionally to improve release quality.

Develop and deploy reliable software for a distributed SQL database in a fast-paced production environment. Responsibilities include designing, coding, testing, and owning projects throughout the product lifecycle. Work may involve LLMs, vector indexes, database fault tolerance, SQL query performance, SIMD, LLVM code generation, search, and query optimization. Collaborate with engineering, product, marketing, and sales teams while developing professionally alongside experienced engineers.

Software Engineer Interns spend 12 weeks contributing to collaborative engineering teams at SingleStore. They develop features, test software, own projects end-to-end, and continuously deploy work to production. Interns gain exposure to the product lifecycle and business while working with experienced engineering mentors and cross-functional teams. The role requires strong computer science fundamentals, programming ability in JavaScript, Golang, or TypeScript, and an interest in building reliable software.

Develop and deploy reliable software for SingleStore’s distributed SQL database. Responsibilities include designing, coding, testing, and improving systems involving query optimization, fault tolerance, concurrency, multithreading, server architectures, LLMs, vector indexes, SIMD, and LLVM code generation. The role involves end-to-end project ownership, collaboration across teams, and participation throughout the product lifecycle.

Build and operate Conduit’s control plane services for provisioning, updating, repairing, and retiring customer infrastructure. Design reconciliation-based lifecycle systems, schema-driven APIs, usage metering, internal tooling, and integrations with billing and partner systems. Own contracts, versioning, reliability, asynchronous workflows, and cross-functional coordination. Participate in on-call support while improving platform maintainability and automation.

Build and operate Conduit's control plane services for provisioning, updating, repairing, and retiring customer infrastructure. Design schema-driven lifecycle systems, usage metering, APIs, contracts, internal tooling, and integrations with billing and partner systems. Ensure reliability through reconciliation, event-driven workflows, idempotency, retries, and eventual consistency. Own cross-team interfaces, improve maintainability, participate in on-call, and debug complex production issues across networking, performance, data integrity, and security boundaries.