Top Software Engineer Jobs in Chicago, IL

Leads the Merchant & Pay engineering organization, overseeing managers and teams responsible for merchant, partner, payment, and internal tooling systems. Owns technical strategy, multi-year roadmaps, reliability, scalability, security, engineering standards, and generative AI adoption. Partners with Product, Data, Security, and company leadership while recruiting, developing, and retaining engineering talent. Requires extensive engineering leadership experience, AWS expertise, marketplace or payments experience, and experience scaling business-critical platforms.

Leads frontend and full-stack development for customer order entry applications using React and Next.js. Owns frontend architecture, performance, accessibility, API integration, automated testing, CI/CD quality, observability, and production reliability. Designs complex transactional workflows, mentors engineers, influences technical direction, and partners with product, UX, architecture, and backend teams. The role is approximately 60% hands-on coding and 40% mentorship.

Develop and maintain Kotlin-based payment terminal and SDK solutions deployed across Android, Linux, and backend environments. Build payment features, integrations, and business logic for cards, mobile wallets, and QR codes. Contribute to C++ libraries, automated testing, debugging, and product stability. Collaborate with engineers, designers, and stakeholders while mentoring teammates through reviews and debugging. The role is office-first in Chicago.

Lead the design, development, and support of large-scale Java enterprise applications and cloud-native platforms. Architect microservices, REST APIs, event-driven services, and distributed systems; implement CI/CD, DevSecOps, automated testing, security, monitoring, and observability practices. Provide technical leadership and mentorship, support mission-critical production systems, lead incident resolution, and improve reliability and performance across global, regulated-data environments. Preferred experience includes AI/LLM integrations, globally distributed databases, multi-region architectures, and SRE practices.

Build and operate reliability systems for a cardiovascular data platform, including monitoring, SLIs, SLOs, incident response, automation, and observability. Investigate end-to-end failures across devices, connectivity, mobile applications, firmware, and cloud services. Analyze fleet-level reliability using Python, SQL, and BigQuery; automate manual checks; conduct postmortems; and improve telemetry to ensure complete, trustworthy clinical data delivery.

Diagnose and resolve complex customer issues involving HERE data, APIs, SDKs, and applications. Build AI-powered troubleshooting tools and automation, convert recurring problems into reusable workflows, experiment with Generative AI, and share engineering practices across Technical Support. Requires strong programming, REST API, cloud, distributed systems, troubleshooting, and customer communication skills.

Lead the design, development, and implementation of low-latency brokerage systems, mentor engineering teams, and ensure high performance of trading applications.

Develop and maintain secure, scalable full-stack billing and payments software using Java and related technologies. Responsibilities include feature development, testing, performance and security improvements, AI-assisted development, stakeholder communication, and collaborative solution design. The role works closely with global engineering and product teams supporting payment processing for higher education clients.

Design, develop, optimize, deploy, and maintain high-performance market data and automated trading systems. Process raw market data feeds, implement CME and Cboe exchange protocols, and optimize concurrency, throughput, scalability, and ultra-low-latency performance. Collaborate with traders, quantitative researchers, analysts, and engineers while supporting critical applications, automated testing, peer reviews, and best practices. Coach junior engineers and take ownership of projects from design through maintenance.

Owns end-to-end EDI integration implementations, including requirements analysis, mapping, development, testing, deployment, monitoring, troubleshooting, and post-production support. The role serves as an integration subject matter expert, develops sustainable data transformation solutions, manages implementation workflows, mentors integration specialists, and collaborates with business, product, and technical stakeholders. Experience with Cleo Integration Cloud, CIC Studio, EDI tools, JSON, databases, and advanced integration methods is required.