{"id":1767790,"url":"https://alion.io/job/caladan-trading-platform-engineer","title":"Software Engineer (Kraków)","company":{"id":2238188,"name":"Caladan","domain":"caladan.xyz","url":"https://alion.io/company/caladan-xyz","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":75,"open_postings":3,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-10T05:45:15Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kraków, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":50000,"max_usd":93000,"period":"year","method":"role_country_seniority_unknown","sample_n":863},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Bash","optional":false},{"name":"C#","optional":false},{"name":"Grafana","optional":false},{"name":"Linux","optional":false},{"name":"Prometheus","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-08-21T12:36:51Z","employer_posted_date":"2026-10-06","last_verified_at":"2026-10-11T20:11:06Z","board_verified":true,"closed_at":null,"days_open":51,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":51},"description":"As a Trading Platform Engineer you'll keep the systems that carry our orders to market fast, observable and dependable. You'll build the tooling the trading platform runs on, own the latency path end to end, and work alongside the desk as the first line of response when production issues arise.\nWhat you'll be doing\nDevelop new features and improvements for our trading platform tools.\nBuild the monitoring layer for essential trading services, from health dashboards to alerting on time-critical paths.\nProvide support during production incidents: verify compute, connectivity, market data, revert to last known good configuration, triage and escalate to service owners where needed, and fix trading platform tooling directly.\nOwn routine maintenance of essential services (version rollouts, configuration changes) and build the tooling that automates it.\nTune the end-to-end latency path, including kernel-bypass networking.\nEstablish and maintain latency baselines, so regressions are surfaced by monitoring before they reach the desk.\nThis role includes participation in an on-call rota shared across the team.\nThe Ideal Candidate\nExperience building or supporting low-latency trading infrastructure in a Linux environment, at a prop trading firm, hedge fund, exchange or crypto trading firm.\nHands-on with performance tuning below the application layer: kernel bypass (DPDK or similar), NUMA and CPU affinity, network stack and buffer sizing.\nStrong automation and scripting skills (Python, Bash or Go), and comfortable working with modern Python or C# codebases.\nExperience with observability and alerting tooling (Prometheus, Grafana or equivalent), and a considered approach to alert design.\nCalm and methodical under production pressure - able to own an incident and escalate clearly.\nTreats documentation and reproducibility as part of the work.\nAbout Caladan\nCaladan is a principal trading firm specializing in digital assets. We support exchanges, tokens, and institutional investors with market-making, tailored API liquidity, OTC options, and investments. Founded in 2017, we have traded continuously through every market cycle, powering over $170B in annual volume across 1000+ assets.","description_format":"text","description_chars":2201,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Cryptocurrencies","DeFi"],"lifecycle":[{"event":"open","at":"2026-10-03T14:30:01Z"}],"visa":[],"liveness":{"score":14,"band":"cold","label":"Long shot","p_open":1,"p_active":0.391,"p_room":0.35,"age_days":49,"expected_fill_days":21,"reasons":["conf:0","win:tail"],"computed_at":"2026-10-10T05:45:15Z"},"pay":null,"html_url":"https://alion.io/job/caladan-trading-platform-engineer","json_url":"https://alion.io/job/caladan-trading-platform-engineer.json","meta":{"generated_at":"2026-10-11T22:34:39Z","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":12624,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"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":2238188},"rest":"https://alion.io/mcp/rest/get_company?id=2238188"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcaladan-trading-platform-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"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%2Fcaladan-trading-platform-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"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%2Fcaladan-trading-platform-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/caladan-trading-platform-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcaladan-trading-platform-engineer"}]}