Top Senior Full-Stack Engineer Jobs in Chicago, IL

Lead a portfolio and team to design and deliver cloud-based, full-stack, microservices solutions meeting regulatory needs. Mentor engineers, collaborate with product managers, occasionally code and evaluate implementations, and use modern cloud, container, database, and AI-related tooling.

Lead design and implementation of the PSA Liquidity Platform connecting buyers and sellers. Build buyer tooling, matching/ranking engines, and seller experiences. Architect and operate microservices and Kafka-driven systems on Kubernetes/AWS, instrument observability, apply AI tooling across the SDLC, and drive cross-functional delivery from 0-to-1 while owning end-to-end outcomes.

Senior server-side engineer to develop and extend gameplay features and systems using PHP, work with relational and non-relational data stores, integrate new tools, and help define and scope work on high-profile live game titles.

Senior Full Stack Engineer for Grainger's Home Page and Display Customizations team. Build and maintain reusable React components, design and evolve backend services, improve observability and reliability, modernize legacy systems, and contribute to micro-frontend architecture. Mentor junior engineers, lead team projects, and collaborate with stakeholders to deliver high-quality customer-facing features.

Design and build agent-powered mission consoles, collaborate with stakeholders to improve user workflows, and maintain agentic workflows for mission outcomes.

The Senior Full-Stack Engineer will manage client relationships, design integration solutions, and ensure seamless delivery and optimization of technical workflows, while leveraging AI for efficiency.

Build and ship full-stack features for customer-facing Console and Playground, plus internal tools. Design and maintain APIs and backend services, implement accessible performant frontends, translate product requirements into incremental work, and improve code quality through reviews and design discussions.

Lead diverse technology projects and teams to create solutions, mentor engineers, collaborate with product managers, and implement cloud-based solutions.

Build end-to-end full-stack AI features on a Ruby on Rails backend and React frontend, including LLM inference infrastructure, RAG, AI agents, and evaluation/observability. Design and run experiments (A/B tests), optimize systems for production performance and reliability, and iterate rapidly with product and design partners.

Build and evolve Circle Discover marketplace features: high-converting purchasing flows, algorithmic recommendations, content feeds, and listings. Work across a Ruby on Rails backend and React/Next.js front-ends, optimize performance and SSR/SSG, collaborate with designers and leaders, and improve codebase quality while shipping at pace in a distributed remote team.

Develop and deliver production-ready web experiences for marketing using React, Gatsby, and Tailwind. Build API integrations, maintain a lightweight codebase and design-system components, ensure accessibility, performance, SEO, and multi-region support, participate in code reviews, and help shape tooling and best practices across the team.

As a Senior Software Engineer, you'll implement collaboration features, support team architecture, work across tech stacks, and improve developer experience.

Design, build, and maintain full-stack web and mobile applications using modern JavaScript frameworks. Produce high-quality, testable code, participate in architecture and estimation, support existing client sites, follow QA and review practices, and optimize performance and scalability. Collaborate with product managers, UX, and cross-functional teams.

Lead and deliver cloud-based, full-stack solutions for a global payments network. Manage a portfolio and team, design distributed microservices, mentor engineers, collaborate with product, and use cloud, container, database, and multi-language technologies to meet regulatory and business needs.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

As a Senior Software Engineer, you'll design, develop, and maintain full-stack applications, utilizing TypeScript and modern frameworks while collaborating cross-functionally to enhance user experience and performance.

Design and build a high-performance, AI-native web trading experience for sophisticated retail traders. Ship core trading workflows (order entry, positions, blotter, watchlists, alerts), implement trustworthy AI UI patterns, collaborate with backend engineers on low-latency contracts, and iterate quickly with users and stakeholders to deliver end-to-end product features.

Lead design, development, testing, deployment, and maintenance of scalable full-stack software that integrates ELT/ETL pipelines and client-facing sites. Drive data engineering, automation, operational stability, SDLC and DevOps best practices. Collaborate with product and stakeholders to translate requirements, produce technical documentation, troubleshoot issues, mentor junior engineers, and influence architecture and engineering standards.

Build and maintain full-stack applications, microservices, APIs, and highly available AWS services using Node.js and event-driven architectures. Develop tested, documented code across front-end and back-end layers, deploy and scale applications, monitor systems with Datadog, and contribute to technical design and production support. Collaborate with stakeholders, reverse-engineer legacy applications, use AI-assisted development tools, and own ambiguous projects through completion while contributing to quality improvements.

Design, implement, and maintain scalable serverless backend services and responsive Next.js front-end components. Build data scrapers and integrations, improve CI/CD and IaC, mentor junior engineers, and collaborate with product and clients to solve complex compliance problems.

Build and ship end-to-end features across a Python/FastAPI backend, PostgreSQL database, Vue/Nuxt/TypeScript web app, and native Swift iOS app. Develop REST APIs, optimize data models and queries, integrate Stripe, Firebase, and Google Cloud services, and help shape engineering practices on an early-stage team. Use AI-assisted development tools effectively while critically reviewing their output.

Lead the development of an AI-powered AML platform, guiding a team in best practices, architecture, and delivering high-quality software solutions using Java and React.

Design, develop, and deploy enterprise APIs and integrations using MuleSoft and Azure integration services. Build event-driven, cloud-native integrations, implement API security and observability, support L2/L3 production issues, and collaborate with onshore/offshore teams. Promote CI/CD and modern integration best practices and leverage AI/LLM-enabled APIs to accelerate development.

Build and ship end-to-end full‑stack features for pharmacy and health system workflows. Partner with product and operations, own design through production and support, embed AI into workflows, review code, and contribute to platform durability and scaling in a compliance‑critical healthcare environment.

Design, build, and maintain scalable backend services and APIs for commerce workflows using Python/Django. Improve reliability, performance, and observability, operate AWS deployments, work with PostgreSQL and event-driven architectures (SNS/SQS), modernize legacy systems, and support CI/CD, testing, and production troubleshooting.