{"id":3620928,"url":"https://alion.io/job/cshark-fullstack-developer-net-react-2","title":"Fullstack Developer .NET + React","company":{"id":1383,"name":"CSHARK","domain":"cshark.com","url":"https://alion.io/company/cshark","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":null,"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":130,"max":160,"currency":"PLN","period":"hour","gross":null,"usd_annual":82000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"Azure Cosmos DB","optional":false},{"name":"C#","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Dependency Injection","optional":false},{"name":"Docker","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-11-02T15:34:10Z","employer_posted_date":null,"last_verified_at":"2026-11-02T15:34:10Z","board_verified":false,"closed_at":null,"days_open":1,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":1},"description":"We are looking for an experienced Fullstack Developer (.NET + React). We value direct communication and an open approach to problem-solving.\nCurrently, we are working on an application for our international client in the FinTech industry, dedicated to banks and financial institutions.\nThe project is initially planned for 3 months, with a possibility of extension. We are looking for candidates who are available to join the project immediately.\n\n In Short\n100% REMOTELY or from one of our 2 offices\n💰 Senior: 130 - 160 pln/h\n☑️ B2B contract \n\nYour Daily Missions\nDesigning web solution architecture based on best practices, using microservices and the cloud services. \nDeveloping within a SaaS product platform. \nImplementing new functionalities using .NET and React. \nDesigning, developing, and maintaining APIs, services, and systems on a cloud-based platform. \nBuilding high-performance front-end and back-end solutions. \nPreparing tests and technical documentation. \nBeing part of a SCRUM team that develops and delivers software solutions throughout the entire production lifecycle. \n\nWymagania\nThe Essentials We’re Seeking\nOver 4 years of commercial programming experience with .NET, C#, React and TypeScript (but will be ok more experience in back-end). \nStrong understanding of software architecture principles and backend design patterns (e.g., dependency injection, repository, mediator, factory). \nExposure to cloud environments (Azure or AWS) and understanding of infrastructure and services.. \nFluency in English and Polish (minimum B2+) - a must. \nHands-on experience with CQRS and Domain-Driven Design (DDD), including aggregates, entities, value objects, and bounded contexts. \nUnderstanding of Event Sourcing concepts - including event stores, event replay, and how to model state changes as immutable domain events. \nSolid knowledge of clean architecture and separation of concerns. \nExperience with PostgreSQL and modern ORM frameworks (e.g. Entity Framework or equivalent). \nExposure to CosmosDB or similar NoSQL/document databases. \nExperience designing and consuming RESTful APIs. \nFamiliarity with Docker for local development and deployments. \nTech stack\n.NET\nReact\nMicroservices\nCloud\nSaaS\nBackend\nScrum\nC#\nTypeScript\nDesign Patterns\nAzure\nAWS\nCQRS\nDomain-driven design\nDDD\nEvent Sourcing\nClean Architecture\nPostgreSQL\nORM\nEntity Framework\nCosmos DB\nNoSQL\nREST API\nDocker","description_format":"text","description_chars":2398,"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":["IT Outsourcing & Dedicated Teams","Mobile App Development Services","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-11-02T18:22:30Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":30,"reasons":["seen:0","velocity","win:early"],"computed_at":"2026-11-03T05:54:40Z"},"pay":{"stated_usd_annual":82000,"is_top_pay":false},"html_url":"https://alion.io/job/cshark-fullstack-developer-net-react-2","json_url":"https://alion.io/job/cshark-fullstack-developer-net-react-2.json","meta":{"generated_at":"2026-11-04T02:07:07Z","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":3201,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-05T00:00:00Z"}},"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-fullstack-developer-net-react-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-fullstack-developer-net-react-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-fullstack-developer-net-react-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-fullstack-developer-net-react-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcshark-fullstack-developer-net-react-2"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3620928}},{"tool":"search_jobs","arguments":{"company":"cshark.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3620928},"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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