{"id":944025,"url":"https://alion.io/job/old-mission-senior-software-engineer-post-trade","title":"Senior Software Engineer - Post Trade","company":{"id":678384,"name":"Old Mission","domain":"oldmissioncapital.com","url":"https://alion.io/company/oldmissioncapital","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":70,"open_postings":26,"ghost_share":0.5,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-13T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Chicago, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":123000,"max_usd":226000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":3030},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Linux","optional":false},{"name":"MySQL","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-08-26T19:12:12Z","employer_posted_date":"2026-08-26","last_verified_at":"2026-10-13T05:29:28Z","board_verified":true,"closed_at":null,"days_open":47,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":47},"description":"Old Mission is a global proprietary trading firm that leverages state-of-the-art technology and research to identify and execute profitable trading strategies across multiple asset classes around the world. Our offices in Chicago, New York, and London are all composed of naturally-curious individuals who thrive in a team environment and constantly strive for improvement.\nAbout the Position\nWe are actively hiring a Senior Software Engineer with a passion for building reliable systems at scale. As a post-trade developer, you will coordinate solutions across a wide range of inputs, outputs, and latency requirements. You will bring proven expertise in Python and C++ to a distributed system that supports global trading across the entire firm.\n Required Skills\nBachelor's degree in Computer Science, Mathematics, or a related Engineering/Science discipline\nA minimum of 5 years of professional Python and C++ experience in a production setting\nStrong Linux knowledge (e.g. performance tuning, networking)\nComfortable working with relational databases (e.g. PostgreSQL,MySQL, etc.)\nFIX experience (e.g. execution management, market data, drop copy)\nExceptional written and verbal communication skills\nA collaborative team player with a knack for owning and driving exciting projects\nThrives in a fast-paced work environment, showcasing effective problem-solving abilities\n Benefits and Perks \nFully paid Medical, Dental, Vision, Disability, and Life Insurance\nFully stocked kitchen; free breakfast and lunch every day on-site\nTuition Reimbursement Program\n401(k) with employer match\nPaid Vacation, Sick, and Parental leaves\nCommuter and Flexible Spending Programs\nIn office M-F with 10 remote days per year\n Base Salary Range \n$200,000 - $250,000 - Salaries are based on numerous factors such as skills, experience, and education. Our compensation package also includes a discretionary bonus and a comprehensive benefits program for full-time employees. For more information, reach out to your recruiter. \nOld Mission is not accepting unsolicited resumes from any staffing/search firms. 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