{"id":4077731,"url":"https://alion.io/job/old-mission-founding-software-engineer","title":"Founding Software Engineer","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":"Ashby","truth_index":{"grade":"B","score":79,"open_postings":26,"ghost_share":0.269,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":110,"computed_at":"2026-11-11T05:49:22Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Hong Kong"],"countries":["HK"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"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},{"name":"DNS","optional":true}],"status":"live","first_seen_at":"2026-11-11T15:27:02Z","employer_posted_date":"2026-11-11","last_verified_at":"2026-11-11T16:01:11Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"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\nOld Mission Capital, a quantitative proprietary trading firm, is hiring its first Senior Software Engineer in Hong Kong to own the technology that keeps our APAC office trading. This could be anything from the office network and printers to our low-latency trading systems. This is a generalist role by design. You will be the founding engineer on the ground, working directly with Traders and Quants, and you will build and run the infrastructure and automated trading systems behind their strategies. You will also set the engineering standards for the Hong Kong office as it grows.\nRequired Skills\nBS/BA degree in Computer Science, Engineering, or another technically related field\n\n5+ years as a professional software engineer building and running production systems, with strong Python and C++ skills\n\nStrong Linux systems and administration skills, including troubleshooting, scripting, and systems programming\n\nExperience with relational databases (e.g., PostgreSQL, MySQL)\n\nMust be fluent in writing and speaking English and Cantonese\n\nAbility to work directly with Traders and Quants and to collaborate across offices and time zones\n\nNice to Have\nNetworking fundamentals (TCP/UDP, DNS, VPNs, switching, and routing)\n\nExperience with parallel, concurrent, and multi-threaded programming\n\nExperience writing applications that connect to exchange APIs or use network protocols\n\nExperience developing low-latency trading systems\n\nOld 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.","description_format":"text","description_chars":2187,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Stock Exchanges & Market Infrastructure","Hedge Funds & Alternative Investments"],"lifecycle":[{"event":"open","at":"2026-11-11T16:01:11Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":110,"reasons":["conf:1","win:early"],"computed_at":"2026-11-11T17:12:58Z"},"pay":null,"html_url":"https://alion.io/job/old-mission-founding-software-engineer","json_url":"https://alion.io/job/old-mission-founding-software-engineer.json","meta":{"generated_at":"2026-11-11T17:12:58Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":32814,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":678384},"rest":"https://alion.io/mcp/rest/get_company?id=678384"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fold-mission-founding-software-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fold-mission-founding-software-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fold-mission-founding-software-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/old-mission-founding-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fold-mission-founding-software-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4077731}},{"tool":"search_jobs","arguments":{"company":"oldmissioncapital.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4077731},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}