Top Senior Level Software Software Engineer Jobs in Chicago, IL

Design, build, and operate low-latency, high-throughput ad delivery systems for bidding, ranking, auctions, and pacing. Integrate ML signals, collaborate with Product and Data teams, ensure reliability and observability, run operational reviews, and mentor engineers while driving scalable backend APIs and data processing pipelines.

Leads architecture and hands-on development for scalable web and mobile pharmacy applications using React.js, React Native, and Next.js. Establishes monorepo strategies, API ecosystems, coding standards, testing, performance optimization, and application release processes. Integrates enterprise AI and ethical AI practices into engineering workflows while mentoring team members and partnering with design and backend teams.

Own the design, development, deployment, and maintenance of backend services, APIs, databases, integrations, and cloud infrastructure. Build secure REST and GraphQL APIs, optimize relational data systems, modernize service architecture, maintain CI/CD and testing, and implement privacy and security controls. Collaborate with frontend, QA, and product teams, review code, document systems, and mentor developers.

Provide technical leadership to design, build, and operate scalable, secure cloud-native microservices and REST APIs (Java/Spring Boot/AWS). Drive architecture, code reviews, automated testing, CI/CD, observability, and resolution of complex production issues while collaborating with product, UI, and partner teams.

Design, build, and own large-scale segmentation systems, data pipelines, APIs, and customer-facing dashboard experiences. Lead architecture and product decisions, improve performance, reliability, and cost, mentor engineers, collaborate cross-functionally, and maintain operational procedures for systems processing billions of users daily. The role requires hands-on technical leadership across distributed systems, high-throughput data platforms, and customer-facing products.

Leads technical vision and hands-on engineering for high-volume, low-latency payment systems. Responsibilities include architecting scalable distributed platforms, modernizing monoliths into microservices and event-driven systems, defining API and design standards, ensuring performance and operability, mentoring engineers, leading cross-domain initiatives, and partnering with product and architecture leaders on long-term platform strategy.

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.

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.

Design and implement software solutions for the Product Consumer team, including microservices, web applications, APIs, asynchronous jobs, production debugging, and risk mitigation. Collaborate with engineering, product, analytics, and operations teams to deliver products iteratively. Oversee projects end-to-end, mentor junior developers, evaluate technical approaches, and help shape team priorities and initiatives.