Jobs / United States / Old Mission Capital LLC

Old Mission Capital LLC

C++ Software Engineer - Research Infrastructure

Chicago, IL, United States Posted 27 days ago $175,000 - $300,000

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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 Old Mission is seeking a highly skilled Software Engineer to join our Research Infrastructure team. The team is responsible for managing and maintaining datasets, infrastructure, and libraries that power the firm's research activities across a huge number of instruments in nearly all asset classes - a vast data universe of Equities, Options, Commodities, Bonds, and more. Our day to day consists of handling production issues, developing new datasets, building next-generation infrastructure, and maintaining our data pipelines. This person will sit in our Chicago office. Responsibilities: • The complexity of data sources presents unique engineering challenges that require innovative solutions that you will help create • You will be responsible for designing, building, and maintaining data pipelines and data infrastructure • You will help capture, archive, store, and index data for the entire firm • You will design and implement big data tooling to support cluster computing and high-throughput computing tasks • You will work on solving problems relating to how data is transmitted between C++ and Python • Re-architect current APIs to ensure scalability and performance improvements • Collaborate in the release process, including rolling out new releases, debugging and maintenance of systems • Identify and implement strategies for upgrading the current data storage capacity • Use a combination of technical expertise and analytical skills to ensure the efficient and effective functioning of our data infrastructure • Focus on solving tough problems using research and data and spend time solving these problems utilizing modern technologies Required Skills • Experience with C++ (required) and Python (preferred) • 4+ years of experience as a Systems Engineer, Platform Engineer, Data Engineer, Software Engineer, or similar - "Big Data" experience preferred • Ability to drive and lead technical projects as well as mentor junior engineers • Knowledge of software engineering practices - what makes code reusable and extensible • Passion for infrastructure: building internal tooling and frameworks • Experience with the design and implement big data tooling to support cluster computing and high-throughput computing tasks is a plus • Experience with Linux APIs – filesystems, networking, processes management, etc. • Experience developing big data technology, preferably complete rebuilds is a plus • Bachelor's degree in Computer Science or a related field Benefits and Perks • Competitive salary with discretionary annual bonus • 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 Base Salary Range $175,000 - $300,000 - 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 dee

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