Top Senior Level Software Software Engineer Jobs in Chicago, IL

Senior full-stack JavaScript engineer to develop and modernize web applications. Build backend APIs with Node.js, create responsive single-page apps using Angular.js or Vue.js, implement consistent CSS/SASS, follow MVC/MVVM patterns, work in Agile/Scrum, and promote usability and scalability within a financial services context.

The role involves designing and building AI-native systems for revenue teams at Upside, including developing applications, partnering with teams, managing the entire stack, and improving system reliability and performance.

The Senior Software Engineer will design and build cloud-native applications, lead technical initiatives, and mentor junior developers while collaborating with the product team.

Lead enterprise architecture strategy for a global payments platform. Establish architecture standards, modernize legacy systems, guide cloud-native and microservices adoption, mentor architects, enable governance, advise the CTO on technology investments, and drive platform scalability, security, and compliance across global engineering teams.

Design, implement, test, deploy, and monitor scalable backend services and high-availability processes. Lead architectural decisions, mentor junior engineers, drive feature lifecycles, improve code quality and testability, and respond to customer issues. Contribute to Agile planning and documentation across domains while addressing performance, scaling, and systemic problems.

Lead cross-functional teams to design, build, and deliver high-quality web, mobile, and embedded software. Provide technical direction, mentor developers, promote best practices (TDD, Agile), communicate with clients, and contribute to company technical outreach. Balance hands-on coding with architecture, team coaching, and client-facing responsibilities.

This role involves leading engineering teams, owning technical direction, and managing release cycles for a gaming platform, with hands-on coding and architectural responsibilities.

Design and extend actor-like programming notations and compiler toolchains for an event-driven graph accelerator. Implement code generation, register and locality management, data-movement optimizations, and performance profiling. Maintain and extend compiler frameworks (LLVM/GCC/MLIR) and optimize for parallelism, memory hierarchy, and specialized hardware.

Lead and manage a team of full‑stack and backend engineers to design, build, and maintain scalable Java/Python applications and ETL/data pipelines. Own production stability, monitoring, incident response, and CI/CD-driven deployments. Partner with product, QA, and clients to deliver API-driven microservices, mentor engineers, drive sprint planning, and contribute to architecture and long‑term technical strategy.

Develop and maintain internal full-stack applications using C#/Blazor or Python. Build CI/CD pipelines and infrastructure automation with GitLab, Azure DevOps, GitHub, Artifactory, and SonarQube. Partner with cross-functional teams to improve software delivery, code quality, security, compliance, and operational visibility. Implement scalable enterprise solutions, infrastructure as code, secure development practices, and DevSecOps workflows.