Top Backend Engineer Jobs in Chicago, IL

Design, build, and scale backend microservices and APIs for high-volume financial and transactional systems. Implement secure integrations with payment processors and banks, develop data-driven account and transaction services, ensure data integrity and performance, and collaborate cross-functionally to deliver production-grade fintech features with strong development practices.

As a Backend Engineer, you'll improve Git and Gitaly by contributing features, bug fixes, and performance improvements, collaborating with the open source community, and participating in architectural discussions.

Design, build, and maintain backend services powering Clerkie's platform. Improve reliability, performance, scalability, observability, and support feature development. Participate in technical design, cross-functional collaboration, documentation, and own projects end-to-end in a fast-moving startup environment.

As a Staff Backend Engineer, you'll design and operate backend services, lead technical initiatives, ensure reliability, and mentor team members in a remote-first setup.

As a Staff Engineer for Revenue, you'll shape technical vision and architecture for billing and pricing systems, ensuring correctness while enhancing cross-team collaboration.

Lead a team and portfolio of backend engineering projects to build cloud-based, microservices-driven solutions. Mentor engineers, collaborate with product managers, and implement scalable systems using Java/Python/Node/Go/Scala, containers, orchestration, databases, and AWS services to meet regulatory and customer needs.

Lead backend engineering portfolio and developer team to build cloud-based, distributed microservices and full-stack solutions. Mentor engineers, evaluate and sometimes write code, collaborate with product managers, and apply technologies like Java, Python, Node, Go, Scala, containers, and AWS to meet regulatory and customer needs.

Lead a team of developers to deliver cloud-based solutions, solve complex business problems, and mentor junior engineers while staying current with technology trends.

Seeking a Software Engineer to build scalable applications for ETF operations, automate data validation, and integrate diverse financial data sources.

You will tackle AI challenges, develop scalable software and collaborate with teams to enhance healthcare navigation using AI solutions.

Design, build, and maintain backend systems and APIs that power financial decision-making. Collaborate with engineers, designers, data scientists, and product managers to implement features, uphold engineering standards, and contribute to architecture for scalable, distributed systems.

Design, build, test, and maintain backend services and APIs powering the insurance platform. Integrate payments, documents, and data providers, improve system stability, performance, and scalability, mentor team members, and participate in architectural decisions and agile ceremonies.

As a Senior Backend Engineer at DuckDuckGo, you'll lead backend projects, mentor engineers, and develop AI-enhanced features for the company's privacy-centric product line.

The Senior Backend Engineer will develop the Payroll product, overseeing the entire development cycle from design to deployment, in a microservices architecture.

Design and implement secure, scalable backend services for voice agents, integrate AI models and telephony, improve inference, debug concurrent systems, and collaborate with Product to deliver features end-to-end.

Lead and mentor engineers to design, build, and scale low-latency trading back-end services, data pipelines, and integrations. Analyze complex cross-workflow problems, develop performant distributed systems, perform data analysis, and maintain ELT processes.

Design and implement scalable backend services for payment and transaction workflows using Java. Own end-to-end features from data model and APIs to Angular frontends, improve reliability and performance, refactor legacy systems, troubleshoot production issues, and collaborate with product and design. Leverage AI-assisted development tools responsibly and share best practices across the team.

Lead and mentor a backend engineering team to design and deliver cloud-native, distributed microservices and full-stack solutions. Drive regulatory-focused technology projects, collaborate with product managers, write and review code, experiment with emerging tools, and leverage AWS/Azure/GCP, containers, and databases to build scalable systems.

The Staff Software Engineer will lead technical strategy, ensure system availability, and develop backend systems at scale, collaborating across teams to drive capacity modeling and operational quality.

Design and implement secure, scalable backend services for speech inference and audio processing. Optimize networking, transcoding, latency, memory, and distributed compute orchestration. Measure and improve system performance, debug complex networking/scheduling/HPC issues, customize services for customers, and partner with Product to deliver features end-to-end.

Senior Java backend engineer responsible for designing, developing, deploying and supporting backend APIs and services for enterprise digital, dealer, and customer applications. Work is ~70% new development, ~30% maintenance, using AWS/cloud infrastructure, CI/CD, automated tests, and Scrum; includes database changes, security, troubleshooting, and occasional high-level design and cross-team collaboration.

Lead and deliver quarterly goals for a backend team; guide engineers through ambiguous problems; collaborate with product, design, and analytics; identify and resolve project and technical issues; ensure operational availability and on-call readiness; set code and design quality standards; and mentor and develop team members.

Design, build, and maintain backend services and APIs using Ruby on Rails. Improve performance, scalability, reliability, and write well-tested production code. Collaborate with Product, Frontend, Data Engineering, and QA teams.

Develop, maintain, and optimize mission-critical backend APIs and scalable cloud services for web and mobile clients. Implement secure, high-performance systems, automated tests, observability, and technical documentation. Mentor peers, follow best practices, and support a proof-of-concept launch and fundraising activities as a volunteer contributor.

The Back-end Engineer will develop and maintain services and APIs, design data models, and contribute to system stability, collaborating with other engineers and product managers.