Jobs / United States / Old Mission Capital LLC

Old Mission Capital LLC

Senior Software Engineer - Post Trade

Chicago, IL, United States Posted 1 month ago $200,000 - $250,000

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Sponsorship verdict

Sponsorship possible

One solid signal, not two. Worth applying, and worth asking about sponsorship early.

  • Employer is on a government sponsor recordThe US Department of Labor certified 3 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first.
  • The posting doesn’t mention sponsorshipSilence isn’t a refusal — ask the recruiter before investing much time.
  • No salary bar for this routeH-1B has no fixed salary bar: the employer must pay at least the prevailing wage for the role and area.
  • What Old Mission Capital LLC paid sponsored hires in similar roles3 certified filings for “Software Engineer” (Software Developers) in IL: $175k–$200k, median $175k.
  • Confirmed live todayWhen a source last listed this job as open.
Details and sources
Employer is on a government sponsor record
The US Department of Labor certified 3 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first. Source: LCA disclosure data (US Department of Labor (OFLC)).
No salary bar for this route
H-1B has no fixed salary bar: the employer must pay at least the prevailing wage for the role and area. Cap-subject employers enter a lottery weighted by wage level. Source: https://www.federalregister.gov/documents/2025/12/29/2025-23853/weighted-selection-process-for-registrants-and-petitioners-seeking-to-file-cap-subject-h-1b, rules effective 2026-02-27.
What Old Mission Capital LLC paid sponsored hires in similar roles
3 certified filings for “Software Engineer” (Software Developers) in IL: $175k–$200k, median $175k. Most were filed at wage level I (67%) — 1 lottery entry, ≈15% projected selection odds for cap-subject employers. Source: US Department of Labor LCA disclosure data (Oct 2025 – Jun 2026).

US H-1B: cap-subject employers enter a lottery weighted by wage level — Level I gets 1 entry, Level IV gets 4 (DHS projected selection odds ≈15% at Level I to ≈61% at Level IV). Universities and non-profit research employers are cap-exempt. The $100,000 fee for new petitions from abroad is currently blocked by a court order (appeal pending).

A verdict summarises public evidence. It is not legal advice and never a guarantee: the employer and the immigration authority decide. Sign in to factor in where you can already work.

About the role

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. About the Position We 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. Required Skills • Bachelor's degree in Computer Science, Mathematics, or a related Engineering/Science discipline • A minimum of 5 years of professional Python and C++ experience in a production setting • Strong Linux knowledge (e.g. performance tuning, networking) • Comfortable working with relational databases (e.g. PostgreSQL,MySQL, etc.) • FIX experience (e.g. execution management, market data, drop copy) • Exceptional written and verbal communication skills • A collaborative team player with a knack for owning and driving exciting projects • Thrives in a fast-paced work environment, showcasing effective problem-solving abilities Benefits and Perks • Fully paid Medical, Dental, Vision, Disability, and Life Insurance • Fully stocked kitchen; free breakfast and lunch every day on-site • Tuition Reimbursement Program • 401(k) with employer match • Paid Vacation, Sick, and Parental leaves • Commuter and Flexible Spending Programs • In office M-F with 10 remote days per year Base Salary Range $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. Old Mission is not accepting unsolicited resumes from any staffing/search firms. All resumes submitted by staffing/search firms to any employee at Old Mission via-email, the Internet or directly without a valid signed search agreement will be deemed the sole property of Old Mission, and no fee will be paid in the event the candidate is hired by Old Mission.

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