Top Tech Jobs & Startup Jobs in Chicago, IL

Lead development of a full-stack React Native and React application, define code standards, build high-quality cross-platform mobile UIs, integrate native APIs, fix performance issues, publish to App Store and Play Store, write automated tests, and contribute to open-source fixes.

Design and execute performance/load tests for microservices and web applications, identify bottlenecks, analyze CPU/memory/network metrics, report defects, collaborate with developers to reproduce and resolve issues, and improve testing processes and tools.

Design, develop, optimize, and deploy high-performance Spark/Scala data processing applications and ETL pipelines using the Cloudera Hadoop ecosystem. Collaborate with analysts and data scientists, ensure data integrity and security, troubleshoot performance, and implement version control and CI/CD for production Spark workloads.

Lead creative vision and execution for brand and marketing projects, manage creative teams or contractors, oversee design strategy, and ensure deliverables meet quality and timeline expectations.

Lead multiple complex projects using established project management methodologies. Own project budgets, forecasting, and financial analysis (EV/ROI). Plan and execute quality control, risk mitigation, stakeholder communication, vendor negotiation, and pre/post implementation activities. Build and lead cross-functional teams, mentor other PMs, and participate in hiring. Escalate issues to program and senior management and develop project policies and standards.

Design, implement, and maintain Java-based applications to automate financial data reconciliation across relational and NoSQL sources. Build deterministic and heuristic matching algorithms, integrate with rules engines (Drools), handle errors and exceptions, collaborate with analysts and architects to resolve data gaps, and support data governance and quality initiatives.

Design, build, and maintain large-scale data pipelines and ETL processes using PySpark/Apache Spark, SQL/NoSQL stores, Hadoop, and Kafka. Work with cloud platforms (AWS/Azure/GCP), data lakes and warehouses, and Python for data manipulation. Lead projects, perform systems analysis, ensure delivery under deadlines, and collaborate across teams. CI/CD and containerization experience is a plus.

Design, build, and optimize native Android applications. Integrate RESTful backends, implement responsive UIs, handle offline storage and threading, use sensors, and automate code quality and CI/CD pipelines.

Gather and document analytics business requirements, conduct needs assessments, translate requirements into user stories, collaborate with data engineers and scientists, create documentation and data dictionaries, participate in agile sprints, support QA and testing, perform exploratory data analysis, build reports and dashboards, monitor analytics solution performance, and evaluate new analytics tools.

Design, develop, and maintain scalable ASP.NET/C# APIs and microservices and front-end interfaces (Vue.js, AngularJS) for retail omni-channel and POS platforms. Contribute to architecture, write production-quality code, troubleshoot issues, participate in code reviews, and collaborate with product, design, and QA to deliver features with minimal onboarding.