Senior Developer - FinTech Trading Platform with AI

optimal sp. z o.o.; Chicago (IL); Hybrid; USD 175,000 - 225,000; Full time

Job summary

Optimal Market Technologies, LLC in Chicago, IL is seeking a Senior Developer to own critical parts of a high-performance options trading platform. You will work across a multi-technology codebase and engage directly with clients, market makers, exchanges and brokers to translate requirements into reliable systems.

The role emphasizes hands-on coding in C++ and Python, Linux-based development, and AI-assisted tooling such as Claude Code to raise engineering standards and efficiency.

Qualifications

• 5+ years of professional software development experience, preferably in finance or latency-sensitive systems.
• Strong, practical ability across C++ and Python.
• Experience supporting and developing Linux-based applications.
• Fluent use of AI-assisted development tools, ideally Claude Code.
• Ability to work directly with clients, market makers and exchanges.

Responsibilities

• Build and own significant parts of a high-performance options trading platform.
• Develop end-to-end features across a multi-technology codebase.
• Write tested, modular code and participate in production ownership.
• Collaborate with clients and counterparties to translate needs into working systems.
• Help set and raise engineering standards for tooling and development.

Skills

C++

Python

Linux

AI-assisted development

Client & stakeholder communication

Tools

Claude Code

PostgreSQL

AERON

perf / gprof

Sanitizers (ASan/UBSan)

Job description

Optimal Market Technologies, LLC in Chicago, IL is seeking a Senior Developer to own critical parts of a high-performance options trading platform. You will work across a multi-technology codebase and engage directly with clients, market makers, exchanges and brokers to translate requirements into reliable systems.

The role emphasizes hands-on coding in C++ and Python, Linux-based development, and AI-assisted tooling such as Claude Code to raise engineering standards and efficiency.