{"id":2705463,"url":"https://alion.io/job/cshark-net-winforms-developer-2","title":".NET WinForms Developer","company":{"id":1383,"name":"CSHARK","domain":"cshark.com","url":"https://alion.io/company/cshark","size_band":null,"is_staffing_agency":false,"employer_type":"services","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":["Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":125,"max":140,"currency":"PLN","period":"hour","gross":null,"usd_annual":72000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"C#","optional":false},{"name":"C++","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-10-16T11:37:03Z","employer_posted_date":null,"last_verified_at":"2026-10-16T11:37:03Z","board_verified":false,"closed_at":null,"days_open":20,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":20},"description":"We are looking for an experienced .NET WinForms Developer to join the frontend engineering team and help build high-performance, real-time trading applications used by professional traders.\nThis role is not about configuring UI frameworks - it is about crafting fast, responsive, custom-rendered desktop UI. \nIn short:\n\n100% remote or from the office (Wrocław, Bielsko-Biała) - You choose!\n125-140 PLN/h\nB2B Contract\n>5 years of commercial programming experience\n\nZakres obowiązków\nDesign, implement and optimize custom WinForms controls (charts, grids, interactive visualization components). \nWork with continuous real-time data streams and ensure ultra-responsive UI under load. \nEnsure smooth multi-threaded UI updates without blocking or freezing. \nCollaborate with backend engineers (C++ systems) to maintain low-latency TCP/socket communication. \nProfile, debug, and tune rendering performance (GC pressure, paint cost, batching, flicker control). \nImprove engineering practices, and influence UI architecture and usability. \nWymagania\nThe Essentials We're Seeking\n5+ years of hands-on experience developing desktop applications in C#/.NET (preferably .NET 8).\nStrong expertise in Windows Forms.\nProven experience building custom UI controls from scratch (inheriting from base controls and implementing custom rendering - not configuring DevExpress/Telerik/Infragistics). \nExperience working with continuous real-time data streams, where data is pushed to the UI (not periodic refresh). \nStrong understanding of multi-threaded UI applications (updating UI safely from worker threads, avoiding freezes and stalls). \nPractical experience in UI performance optimization (reducing redraw cost, minimizing GC pressure, batching updates, preventing flicker). \nExperience working with TCP / socket-based communication. \nAbility to clearly explain previous UI design decisions, trade-offs, and the impact on end users. \nFluency in English (minimum B2+).\nNice to Have\nExperience with trading systems, market data, or real-time financial applications.\nFamiliarity with C++ or interoperability between C# and native components.\nUnderstanding of high-performance visualization and data interaction patterns.\n\nTech stack\nC#\n.NET\n.NET 8\nWindows Forms\nUI Controls\nDevExpress\nTelerik\nInfragistics\nReal-time data streams\nMulti-threaded UI applications\nTCP\nsocket-based communication\nUI design\nTrading systems\nC++\nHigh-performance visualization","description_format":"text","description_chars":2432,"description_truncated":false,"requirements":{"experience_years_min":5,"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":["IT Outsourcing & Dedicated Teams","Mobile App Development Services","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-10-16T12:21:30Z"}],"visa":[],"liveness":{"score":66,"band":"ok","label":"Likely open","p_open":0.85,"p_active":0.858,"p_room":0.9,"age_days":20,"expected_fill_days":30,"reasons":["seen:20","velocity","win:mid"],"computed_at":"2026-11-06T05:58:05Z"},"pay":{"stated_usd_annual":72000,"is_top_pay":false},"html_url":"https://alion.io/job/cshark-net-winforms-developer-2","json_url":"https://alion.io/job/cshark-net-winforms-developer-2.json","meta":{"generated_at":"2026-11-06T07:58:02Z","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":14277,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-07T00:00:00Z"}},"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":1383},"rest":"https://alion.io/mcp/rest/get_company?id=1383"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcshark-net-winforms-developer-2"},{"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%2Fcshark-net-winforms-developer-2"},{"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%2Fcshark-net-winforms-developer-2"},{"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/cshark-net-winforms-developer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcshark-net-winforms-developer-2"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2705463}},{"tool":"search_jobs","arguments":{"company":"cshark.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2705463},"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. 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