> Markdown version of [/jobs/ext/4549583-senior-software-engineer-in-mundelein](https://www.wearedevelopers.com/jobs/ext/4549583-senior-software-engineer-in-mundelein). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer in Mundelein - **Company:** Energy Jobline - **Location:** Mundelein, IL, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Algorithmic Trading, C Sharp (Programming Language), C++ (Programming Language), Financial Information EXchange, Python (Programming Language), Routing - **Published:** November 3, 2026 - **Apply:** https://www.energyjobline.com/job/senior-software-engineer-mundelein-32141373 ## About the Role n \n * Hands on development experience in C++, Python, Java or C# \n * Deep knowledge of the FIX protocol, with hands-on experience implementing or supporting FIX connectivity at a brokerage, trading firm, exchange, fintech, or OMS/EMS vendors \n * Experience with order routing in a multi-system, global trading environment \n * Familiarity with financial models or algorithmic trading strategies \n * Experience with low-latency or high-throughput system design \n * Prior work with connectivity to global exchanges or dark pool \n ## Description Quant Trading firm is looking for a Software Developer to work on electronic trading connectivity infrastructure and high-impact systems that handle order flow across major global markets., You will design, develop, and maintain systems that support electronic order routing and build and enhance FIX connectivity for clients, brokers, exchanges, and internal systems