{"id":2867790,"url":"https://alion.io/job/acaisoft-senior-java-engineer-fintech","title":"Senior Java Engineer (FinTech)","company":{"id":3913604,"name":"Acaisoft","domain":"acaisoft.com","url":"https://alion.io/company/acaisoft-2","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":135,"max":145,"currency":"PLN","period":"hour","gross":null,"usd_annual":74000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Java","optional":false},{"name":"Rest API","optional":false},{"name":"WebSockets","optional":false}],"status":"live","first_seen_at":"2026-10-19T14:08:18Z","employer_posted_date":null,"last_verified_at":"2026-10-19T14:08:18Z","board_verified":false,"closed_at":null,"days_open":8,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":8},"description":"Hi there! If you’re looking for a high-impact position in an ambitious software house, we’ve got a match for you!\n\nWe are looking for a Java Engineer to work with our customer. Our client is a globally operating financial services provider specializing in online CFD trading across forex, commodities, indices, metals, energy, and cryptocurrencies. It combines advanced trading technology, competitive pricing, and fast trade execution to deliver a seamless trading experience for retail and institutional clients. The company operates across multiple international markets and maintains a strong focus on regulatory compliance, client satisfaction, and long-term partnerships with affiliates and introducing brokers.\nZakres obowiązków\nDesign, develop, and maintain backend services and integrations using Java and REST APIs.\nIntegrate with trading platforms through REST and WebSocket APIs, implementing order processing, margin calculations, and profit and loss (P&L) logic.\nEnsure accurate financial calculations, including decimal precision, rounding, and currency handling.\nBuild and maintain integrations with Microsoft Dynamics 365 / Dataverse, AWS Cognito, payment providers, and KYC services.\nCollaborate with cross-functional teams to deliver secure, scalable, and reliable solutions in a regulated financial environment.\nWymagania\nAt least 5 years of professional experience in Java development.\nExperience in FinTech, trading, wealth management, payments, or other heavily regulated industries.\nStrong experience building backend services and integrating external systems through REST APIs.\nExperience with WebSocket APIs and real-time data integration.\nUnderstanding of financial transaction processing, including orders, margins, P&L, precision, rounding, and currencies.\nStrong problem-solving skills and an understanding of secure, reliable software development.\nNice to have:Experience with Microsoft Dynamics 365 / Dataverse.\nFamiliarity with AWS Cognito.\nExperience integrating payment gateways and KYC providers.\nKnowledge of trading platforms and financial products.\nTech stack\nJava\nREST API\nWebSocket\nMicrosoft Dynamics 365\nAWS\nCognito","description_format":"text","description_chars":2157,"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":["Financial Services","IT Consulting & Digital Transformation","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-10-19T18:21:15Z"}],"visa":[],"liveness":{"score":96,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.96,"p_room":1,"age_days":8,"expected_fill_days":28,"reasons":["seen:8","urgency","velocity","win:early"],"computed_at":"2026-10-28T05:59:10Z"},"pay":{"stated_usd_annual":74000,"is_top_pay":false},"html_url":"https://alion.io/job/acaisoft-senior-java-engineer-fintech","json_url":"https://alion.io/job/acaisoft-senior-java-engineer-fintech.json","meta":{"generated_at":"2026-10-28T13:06:48Z","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":17590,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-29T00:00:00Z"}},"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":3913604},"rest":"https://alion.io/mcp/rest/get_company?id=3913604"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Facaisoft-senior-java-engineer-fintech"},{"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%2Facaisoft-senior-java-engineer-fintech"},{"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%2Facaisoft-senior-java-engineer-fintech"},{"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/acaisoft-senior-java-engineer-fintech\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Facaisoft-senior-java-engineer-fintech"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2867790}},{"tool":"search_jobs","arguments":{"company":"acaisoft.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2867790},"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"}}