Top Tech Jobs & Startup Jobs in Chicago, IL

Deploys, monitors, troubleshoots, and manages low-latency network infrastructure supporting high-frequency trading. Responsibilities include colocation and data center design, WAN connectivity, capacity planning, traffic optimization, maintenance, protocol troubleshooting, automation, monitoring, and technical debt reduction. The role requires expertise with routing and network protocols, LAN/WAN environments, performance monitoring, and network automation.

Own global software procurement and category management, including sourcing events, commercial analysis, negotiations, contracts, renewals, licensing, supplier performance, and risk management. Partner with technology, business, finance, legal, and procurement stakeholders to optimize software spend, consumption, total cost of ownership, and supplier outcomes. Develop category strategies, manage global processes, maintain procurement records, and contribute to sourcing playbooks and should-cost models.

Build and improve Optiver’s research platform, including service orchestration, job scheduling, cluster management, big-data processing, and managed compute and data infrastructure. Develop scalable, reliable features in Python and Rust, explore technologies such as GPUs and CUDA, and collaborate with traders, researchers, and engineers on large-scale simulations and model training.

Build and own end-to-end trading systems and workflows, working with traders and researchers. Develop ultra-low-latency execution, research and simulation platforms, routing and exchange connectivity, analytics, and tooling to improve execution and trading performance.

Analyze complex trading positions and portfolios, perform stress tests and scenario analyses, develop risk methodologies and analytics, investigate incidents and limit breaches, and communicate actionable risk insights to traders and senior stakeholders. The role partners with quantitative researchers and engineers to improve trading risk tools, systems, processes, and frameworks.

Conduct IT and information security audits across infrastructure, applications, governance, controls, and trading systems. Plan risk-based engagements, assess controls, document findings, draft reports, advise stakeholders, support broader audits, and improve audit methodologies. Collaborate with global teams and management across multiple offices, with international travel required. The role requires substantial IT audit experience, relevant certifications, strong governance and risk knowledge, and U.S. work authorization without sponsorship.

Develop and manage HPC and storage infrastructure across on-premises and cloud environments. Troubleshoot operating system, storage, networking, and infrastructure issues; support CPU, GPU, and specialized compute systems; contribute to infrastructure innovation; and collaborate with software engineers to deliver an integrated research platform for quantitative and options trading research.

Advises stakeholders on US tax implications of trading strategies, financial products, markets, transactions, entity structures, and cross-border initiatives. Develops tax positions with external advisors, assesses tax risks and opportunities, supports tax controversy matters, and contributes to governance and policy development. Collaborates with global tax, legal, finance, technology, trading, and leadership teams in a fast-paced financial services environment.

Own and maintain Coupa and Rossum platforms, provide L1/L2 finance systems support, triage tickets, manage incidents and SLAs, automate repetitive work with AI tooling, create runbooks and KB articles, coordinate changes across finance systems, support enhancements and mentor colleagues to keep platforms stable, scalable, and well-configured for global finance stakeholders.

Design, build, and operate production-grade AI systems (LLM applications, agent platforms, evaluation frameworks) using Python and modern AI frameworks. Translate ambiguous business problems into scalable, reliable AI solutions, define success metrics and evaluation pipelines, integrate with internal systems and third-party services, and continuously monitor and improve performance, reliability, cost, and safety in production.