Senior Developer

Optimal Market Technologies, LLC•Chicago, IL

1d•$175,000 - $225,000•Hybrid

About The Position

Optimal Market Technologies is a FINRA-registered broker-dealer with an innovative platform of wholesale options and execution solutions designed to meet the needs of today’s dynamic market participants. Optimal can quickly and seamlessly enhance its platform, adapt to regulatory changes, and offer a more efficient implementation that scales as clients grow. Optimal is disrupting the US Options Wholesale landscape by introducing a Competition for Order Flow model through which market makers compete for retail flow on our platform based on best execution quality. Additional offerings include an Institutional Alternative Trading System (ATS) for discreet execution and price improvement and Execution Services for institutional-grade routing and algorithmic execution designed to balance price capture, speed, and market impact across trading objectives. This is an opportunity to work for a fintech start-up and to be an integral part of growing a broker-dealer from the ground up. As a small, hardworking team, we pride ourselves on our entrepreneurial culture and cross-team collaboration. We recently raised funding from several strategic partners and are in a very exciting stage of growth. We are seeking a Senior Developer to build and own significant parts of our high-performance options trading platform. This is a hands-on role across our multi-technology codebase. You will also work directly with clients, market makers, exchanges, and brokers to understand their needs and turn them into working systems. We expect strong, fluent use of AI-assisted development tools, ideally Claude Code, as a core part of how you work. You can help raise the team's standard in this area.

Requirements

5+ years of professional software development experience, with room for a strong 3+ year candidate who has already worked in execution services.
Strong, practical ability across C++ and Python.
Experience supporting and developing Linux-based applications.
Fluent, demonstrated use of AI-assisted development tools, ideally Claude Code, and the ability to raise standards for others.
Experience of financial and trading domains, or similarly latency sensitive systems.
Track record of shipping tested, maintainable code in production.
Strong communication and interpersonal skills; comfortable working directly with clients and counterparties.
Aptitude for balancing speed of delivery with stability in production environments.

Nice To Haves

Experience in US options, wholesale, or execution/routing.
Familiarity with the FIX Protocol.
SQL, ideally PostgreSQL.
GoogleTest or similar unit testing frameworks.
Middleware experience, ideally AERON.
Experience with performance profiling tools (e.g. perf, gprof).
Familiarity with sanitizers for debugging memory/concurrency issues (e.g. ASan, UBSan).
Exposure to code coverage tooling (e.g. gcov, lcov).
Exposure to Rust.

Responsibilities

Contribute directly to our multi-technology codebase across the trading platform.
Build features end to end, and take responsibility for them once in production.
Write tested, documented, modular code that others can own and extend.
Participate in support rotation (starting 7:30am Eastern).
Work directly with clients, PMMs, exchanges, and brokers to answer technical questions.
Expand the tools and data we provide our trading experts to review, research and optimize trading.
Verify and validate specs, and turn them into working implementations.
Use AI-assisted development fluently, and help set standards, evaluate new tools, and bring the rest of the team up to speed.
Improve the team's tooling, scripts, and operational workflows as you go.