{"id":2172635,"url":"https://alion.io/job/jit-team-back-end-engineer-trading-platform-integration","title":"Back-end Engineer – Trading platform integration","company":{"id":53531,"name":"Jit Team","domain":"jit-team.com","url":"https://alion.io/company/jit-team","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Traffit","truth_index":{"grade":"A","score":97,"open_postings":29,"ghost_share":0,"stale_share":0.138,"repost_share":0,"time_to_fill_p50_days":30,"computed_at":"2026-10-12T06:55:09Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":1200,"max":1550,"currency":"PLN","period":"day","gross":null,"usd_annual":99250},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Java","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"WebSockets","optional":false}],"status":"live","first_seen_at":"2026-10-09T10:55:23Z","employer_posted_date":"2026-10-09","last_verified_at":"2026-10-12T19:21:13Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"Salary: 1200-1550 PLN/MD on B2B\nRemote: Warszawa, Gdańsk, Kraków (with 2-3 days in the office weekly)\nWhy choose this offer?\nEnd-to-end ownership with a modern tech stack\n\nStability combined with continuous growth\n\nAutonomy and high-quality collaboration\n\nProject\nJoin a team building and enhancing a high-performance trading ecosystem for global financial markets. You will work on backend services responsible for trading platform integrations, order management, margin calculations, profit & loss processing, and real-time communication with external trading systems.\nThis role requires deep expertise in financial systems, precision-sensitive calculations, and integrations with trading platforms through REST and WebSocket APIs.\nResponsibilities you'll have:\nDesign and develop backend services supporting trading platform integrations\nIntegrate external trading platforms using REST and WebSocket APIs\nImplement and maintain order management workflows\nDevelop margin, risk and P&L calculation services\nEnsure accuracy of financial calculations, rounding rules and currency handling\nOptimize system performance and reliability in real-time environments\nCollaborate with product, architecture and business stakeholders\nSupport production incidents and participate in system improvements\nContribute to technical design decisions and backend architecture\nLeverage AI-assisted engineering tools to improve development efficiency and quality\nExpected competences and knowledge:\n8+ years of experience in backend development\nStrong commercial experience with Java\nStrong commercial experience with Spring / Spring Boot\nExperience integrating external systems through REST APIs\nExperience working with WebSocket-based integrations\nStrong understanding of order lifecycle management\nStrong understanding of margin calculations and P&L logic\nExperience with precision-critical financial calculations\nKnowledge of currency conversion, rounding rules and financial data processing\nExperience working in distributed systems and microservice architectures\nExperience within regulated financial services, brokerage, capital markets or trading environments\nAbility to discuss practical usage of AI tools in software engineering processes\nEngineering degree is highly preferred\nNice to have:\nExperience with TraderEvolution\nExperience building trading platforms or brokerage solutions\nKnowledge of market data feeds and trading workflows\nExperience with low-latency or real-time systems\nTechnologies you'll work with\nJava\nSpring Boot\nREST APIs\nWebSocket APIs\nMicroservices\nFinancial Trading Systems\nOrder Management Systems\nRisk & Margin Services\nReal-time Data Processing\nClient - why choose this particular client from the Jit portfolio?\nOur client is an international financial services organization operating in the capital markets domain, focused on processing and analyzing large volumes of transactional data. The company develops modern data platforms that support trading, operational efficiency, and regulatory reporting. It operates in a fast-paced, highly regulated environment with a strong emphasis on scalability, data quality, and advanced analytics.\nAbout Jit Team\nThe Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts, to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams.\nBehind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.","description_format":"text","description_chars":4246,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Professional development"],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-10-09T12:51:03Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":2,"expected_fill_days":30,"reasons":["conf:3","velocity","win:early","comp:brand"],"computed_at":"2026-10-12T06:55:09Z"},"pay":{"stated_usd_annual":99250,"is_top_pay":false},"html_url":"https://alion.io/job/jit-team-back-end-engineer-trading-platform-integration","json_url":"https://alion.io/job/jit-team-back-end-engineer-trading-platform-integration.json","meta":{"generated_at":"2026-10-12T22:40:38Z","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":37035,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-13T00:00:00Z"}},"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":53531},"rest":"https://alion.io/mcp/rest/get_company?id=53531"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fjit-team-back-end-engineer-trading-platform-integration"},{"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%2Fjit-team-back-end-engineer-trading-platform-integration"},{"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%2Fjit-team-back-end-engineer-trading-platform-integration"},{"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/jit-team-back-end-engineer-trading-platform-integration\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fjit-team-back-end-engineer-trading-platform-integration"}]}