Top Python Jobs in Chicago, IL

Build and maintain scalable real-time and batch data pipelines, backend systems, and APIs. Ensure data quality, performance, and reliability; create automation and monitoring tooling; participate in full SDLC including code reviews, testing, deployment, and operational support.

Build and maintain scalable real-time and batch data pipelines, backend systems, and APIs for ad serving. Create automation and monitoring solutions, ensure data quality and system performance, and participate in the full software development lifecycle. Collaborate with cross-functional teams, optimize code and workflows, and support operations including variable schedules and occasional nights/weekends.

Design, develop, and deliver scalable cloud-native software and measurement infrastructure. Collaborate with product, SRE, QA, and stakeholders to build APIs, reporting, and real-time/batch pipelines. Implement attribution and performance models, automated tests, and ensure solutions are scalable, available, and maintainable. Work hybrid (2 days onsite Chicago) with occasional variable schedules including nights/weekends.

Design, build, and scale Buyercloud ad-serving systems that handle billions of auctions. Implement data- and model-driven features, optimize performance and architecture to reduce cloud costs, extend observability, participate in on-call rotations and incident response, and produce systems documentation and playbooks while collaborating with distributed teams.

Build and scale Buyercloud ad-serving systems that process billions of auctions daily. Design data- and model-driven features, optimize performance and cost, extend observability, participate in on-call rotations, produce documentation and playbooks, and support production incidents.

Lead a team to design and deliver cloud-based, distributed microservices and data platforms (Python/Scala/Spark/AWS). Mentor engineers, collaborate with product managers, evaluate and adopt new technologies, and help meet regulatory needs while occasionally coding and reviewing work.

Lead and mentor engineering teams to design and deliver cloud-based backend solutions using distributed microservices, modern languages and container orchestration on AWS. Collaborate with product, evaluate and write code, and drive technical transformation and regulatory-compliant systems.

Design, develop, test, and maintain backend services and large-scale enterprise applications using Python (pandas, boto3), AWS, and Docker. Participate in full SDLC, produce technical specs, implement CI/CD/DevOps pipelines, use observability tools, perform root-cause analysis, and support production on Linux and Windows environments.

The Lead Software Engineer will develop automated testing capabilities for Capital One's applications, manage test execution, and lead diverse technology projects. The role requires collaboration with product teams and implementing cloud-based solutions while mentoring team members.

Lead a team to integrate data engineering practices within actuarial processes, developing scalable solutions for insurance pricing and analytics.

Contract Python developer to join the FXCash DB team. Participate across the SDLC—story writing, estimation, design, development, test planning/automation, and deployment. Work in an Agile environment with developers and business analysts; apply FX market domain knowledge and messaging/UNIX/database technologies.

Develop and maintain Python applications on the FX Cash DB team. Collaborate with developers and business analysts across the SDLC: story writing, estimation, design, development, test planning, test automation, and deployment. Work in an Agile environment and apply FX market knowledge while using Excel and related technologies (C#, C++, SQL, UNIX, MQ/RV, Perl).

The Quantitative Developer will develop systems from research to production, build simulation infrastructure, manage feature pipelines, and troubleshoot issues in quantitative trading environments.

Develop, design, and deliver complex Python backend applications for acquiring, storing, and computing on large volumes of data. Lead feature implementation, ensure code quality via linting and automated tests, mentor junior developers, perform code reviews, collaborate with cross-functional teams, and troubleshoot production issues.

Develop and maintain scalable Python backend applications and RESTful APIs. Optimize performance, design and manage SQL/NoSQL schemas, implement security/authentication, write tests, automate CI/CD tasks, and collaborate with front-end, product, and QA teams.

The Senior Python Engineer will develop and support MongoDB Python drivers, enhance library quality, and collaborate on product features.

Develop and maintain Python applications focusing on iterators/generators/streams, concurrency (multithreading, non-blocking I/O), and high-precision numeric handling. Work with JSON/XML, REST and SOAP APIs, ACID-compliant databases, message brokers/queues, and produce clean, SOLID code. Unit and integration testing experience is beneficial.

Work as a Python development intern building applications and APIs, processing and analyzing data, working with databases and data pipelines, contributing to system architecture, writing clean documented code, and collaborating with the team. Strong emphasis on backend development, SQL, ORMs, and REST API design with potential conversion to full-time.

Concept Plus seeks a Junior Python Developer to enhance enterprise-scale applications, focusing on backend development, DevSecOps practices, and secure coding under senior guidance.

The Senior Scala/Python Engineer designs and develops scalable back-end systems, architects APIs, optimizes databases, and mentors team members in functional programming practices, enhancing platform reliability and security.

Design, develop, and maintain scalable Python applications and cloud-native solutions. Architect microservices, containerized deployments (Docker/Kubernetes), optimize cloud infrastructure, build CI/CD pipelines, integrate messaging systems, ensure security and high code quality, and mentor junior developers. Generative AI/ML experience is a plus.

As a Senior Software Engineer, you will develop and maintain software solutions, ensuring high-quality delivery and driving technical innovation in a hybrid work setup.

Build and maintain core infrastructure for 24/7 crypto trading: real-time data pipelines, P&L reconciliation, risk calculations, cross-exchange asset management, and trader-facing monitoring and tooling. Integrate with crypto exchanges, normalize market data, reconcile positions, and collaborate with traders to design scalable, highly available systems.

The role involves developing server-side applications using Python, collaborating with teams, utilizing AI tools, and participating in Agile practices while ensuring code quality through testing.

The Senior Full Stack Developer will design, develop, test, and debug software solutions, collaborating with teams and optimizing applications. Responsibilities include user interaction design, back-end functionality, and ensuring software scalability and security.