Top Senior Software Engineer Jobs in Chicago, IL

Build and ship end-to-end product features across an author analytics dashboard, marketing site, free tools, billing, email, and AI-assisted functionality. Design data models and APIs, integrate third-party services, develop production LLM features, and maintain testing, monitoring, performance, and observability. The role includes code review, technical documentation, independent product decisions, and close collaboration with the founder in a remote-first environment.

Design, build, and maintain blockchain and payments infrastructure; develop scalable microservices and secure RESTful APIs to transfer value across blockchain and banking protocols; integrate with banks and fintech; own system design, testing, deployment, and troubleshooting; ensure reliability, code quality, and strong test coverage while collaborating with product and engineering teams.

Leads development of resilient, scalable features across Toast’s enterprise Sports and Entertainment platform, including backend, frontend, and POS systems. Responsibilities include designing, deploying, testing, monitoring, and maintaining production services; leading complex technical projects; collaborating with Product, Design, Customer Success, Sales, and other teams; mentoring engineers; and using AI tools to improve development productivity.

Own and deliver highly available, low-latency backend identity systems supporting consumer onboarding, authentication, and verification. Lead quarterly team goals, guide engineers through ambiguous problems, collaborate with product and design partners, monitor system reliability, improve engineering standards, support on-call operations, and mentor team members. The role requires designing and launching distributed systems at scale using Python or Kotlin, AWS, MySQL, and Kubernetes.

The Senior Fullstack Software Engineer will design, implement, and maintain features for Conveyor's SaaS platform, involving both backend and frontend work, while collaborating closely with team members and mentoring juniors.

Design, build, and maintain AI-powered B2B SaaS products across frontend, backend, and AI. Own projects end-to-end, collaborate with product and design, ensure maintainability, mentor teammates, and inform roadmap and implementation decisions.

Owner of localization automation and integration: design and maintain automation frameworks (Python, APIs), integrate AI/LLM solutions, manage TMS (XTM, Smartling), perform i18n code audits, root-cause complex integration issues, and build self-service tooling for early localization detection.

Build and own the technical roadmap: design AI-first interfaces and APIs, architect scalable ETL pipelines, develop data models for ML features, ship autonomous B2B workflows (PO generation, vendor sync, schedule optimizations), and establish engineering standards, CI/CD, and mentoring.

Build and scale Supabase Storage across client libraries, CLI, CDN, storage servers, and deployment infrastructure. Responsibilities include improving upload and download performance, asset optimization, edge networking, caching, observability, reliability, APIs, developer tools, and the storage explorer. The role also involves PostgreSQL and distributed-systems performance tuning, infrastructure operations, escalated support resolution, and end-to-end project ownership in an asynchronous, remote, open-source environment.

Design, develop, deploy, and maintain high-volume backend systems supporting customer funding, trading, and back-office operations. Lead development practices through code reviews, mentoring, architecture guidance, and quality ownership. Build reliable, observable software using Python and TypeScript, collaborate with finance and trading teams, improve operational efficiency, document workflows, and oversee projects from design through iteration.

Develop and maintain production-grade market data feed handlers and quant-ready data archives supporting research and trading. Work with C++ and Python across proprietary equities protocols, order book data, normalization, gap detection, reconciliation, and backfills. Collaborate with quantitative researchers, support expansion into global markets, improve data systems, and mentor teammates. The role requires strong understanding of market microstructure, venue-specific behavior, and maintainable engineering practices.

Leads development of secure, scalable software solutions using Java, Spring Boot, React.js, and cloud-native technologies. Designs systems, writes and reviews production code, troubleshoots issues, improves operational stability, and guides agile SDLC practices. Promotes responsible AI-assisted engineering, including validation for security, correctness, and performance. Collaborates with vendors and internal teams to evaluate architectures and technology solutions within financial services environments.

Design, build, and own scalable microservices and secure APIs that transfer value across blockchain and banking protocols. Extend in-house blockchain infrastructure, integrate with banks and cloud services, troubleshoot production issues, document system and testing procedures, and collaborate with product and engineering teams to deliver reliable payment experiences.

Develop and modernize a production React Native mobile application supporting offline-first workflows, BLE device integrations, synchronization, scalability, performance, and reliability. Design and maintain application features, contribute to architecture and engineering standards, collaborate cross-functionally, mentor developers, provide technical leadership, and engage with farm customers. Occasional travel to customer locations is required.

Build and architect Clear Street Active, a high-performance trading platform for active traders. Develop responsive web interfaces integrating real-time market data, low-latency execution workflows, and advanced trading tools. Collaborate with cross-functional teams on large-scale initiatives while emphasizing scalability, performance, API quality, maintainability, and developer experience.

Architect and build a high-performance trading platform for active traders. Develop responsive web interfaces integrating real-time market data, low-latency execution workflows, and advanced trading tools. Collaborate with cross-functional engineering teams on large-scale initiatives, emphasizing scalability, performance, API quality, maintainability, developer experience, and end-user usability.

Senior engineer responsible for designing, building, and operating scalable data ingestion, processing, storage, and member-facing membership application. Drive architecture decisions, mentor engineers, build data pipelines, APIs, and ensure reliability, observability, CI/CD, and documentation while partnering with product and analytics stakeholders.

Lead frontend and full-stack engineering, architect scalable features, integrate APIs and cloud services, optimize rendering and performance, establish engineering standards, conduct code reviews, and mentor developers. Collaborate with product, UX, and backend teams to deliver user-focused software while managing priorities in an ambiguous environment.

Senior .NET Software Engineer responsible for end-to-end software development using Microsoft technologies. Requires extensive experience in SDLC, design principles, technical documentation, web application development with .NET, Agile/SCRUM, Entity Framework, database design, and version control. Familiarity with project tools JIRA, TEMPO, Bitbucket, and Confluence preferred.

Designs and implements Go-based control-plane software for custom AI inference hardware. Responsibilities span system management APIs, Linux services, hardware interfaces, diagnostics, observability, security, firmware updates, distributed systems, and workload management. The role requires hands-on debugging across application, operating system, firmware, and hardware boundaries, plus technical leadership, mentoring, architecture, and production ownership. Regular on-site lab work includes server racking, system bring-up, hardware troubleshooting, and documentation.

Build and operate Java-based distributed microservices supporting trade clearing, margin, settlement, reconciliation, and related financial workflows. Responsibilities include designing services, optimizing PostgreSQL, ensuring data integrity, creating tests and observability, defining service-level objectives, contributing to architecture decisions, and participating in production on-call support. The role requires full software lifecycle ownership and collaboration with nontechnical partners in a regulated clearinghouse environment.

Build and operate Java microservices supporting trade clearing, margin, settlement, reconciliation, and financial data integrity. Responsibilities include PostgreSQL optimization, distributed systems development, testing, observability, SLOs, production support, architecture documentation, and on-call ownership. The role collaborates with nontechnical partners and uses technologies including Kubernetes, Kafka, Linux, GitHub Actions, Helm, ArgoCD, and PostgreSQL.

Build and operate Java microservices supporting clearing workflows such as trade processing, margin, and settlement. Responsibilities include optimizing PostgreSQL, ensuring data integrity and reconciliation, implementing observability and service-level objectives, contributing to architecture documentation, testing, production support, and on-call operations. The role requires distributed-systems experience, strong Java skills, and collaboration with nontechnical partners.

Design, build, deploy, and maintain full-stack applications spanning frontend interfaces, backend services, APIs, databases, integrations, and cloud infrastructure. Own complex systems, improve reliability and technical debt, make architectural decisions, mentor engineers, and contribute to code reviews and engineering practices. Evaluate AI-assisted development opportunities and collaborate with product teams, stakeholders, and customers to deliver secure, maintainable software capabilities.

Develop scalable software and agentic workflow features for the AI Platform team. Build and maintain REST APIs, web interfaces, automation tools, and cloud-based applications; improve code quality through testing, reviews, refactoring, and secure engineering practices. Collaborate with architecture, security, DevOps, and infrastructure teams, while mentoring engineers and supporting continuous improvement.