{"id":2113279,"url":"https://alion.io/job/square-one-resources-full-stack-developer","title":"Full Stack Developer","company":{"id":3913592,"name":"Square One Resources","domain":"squareoneresources.com","url":"https://alion.io/company/square-one-resources","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Traffit","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":150,"max":180,"currency":"PLN","period":"hour","gross":null,"usd_annual":92000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Databricks","optional":false},{"name":"FastAPI","optional":false},{"name":"Material UI","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true},{"name":"React.js","optional":true}],"status":"live","first_seen_at":"2026-09-21T11:09:16Z","employer_posted_date":null,"last_verified_at":"2026-09-21T11:09:16Z","board_verified":false,"closed_at":null,"days_open":21,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":21},"description":"We are looking for an experienced Full Stack Developer to join a long-term transformation project for a large international organisation.\nThe role combines modern front-end and back-end development with cloud-based data and application technologies. You will be responsible for building secure, enterprise-grade applications and supporting the implementation of reporting, data and workflow capabilities.\nThis is a fully remote opportunity, with the possibility of extension after the initial 6-month contract.\nAs a Full Stack Developer, you will work across both the application and data layers, contributing to the design, development and implementation of business-critical solutions.\nYou will collaborate closely with technical and data specialists, taking ownership of application development while working within an enterprise architecture and security framework.\nThe role will involve building user-facing applications, developing backend APIs, integrating with data platforms and implementing secure access and control mechanisms.\nZakres obowiązków\nDesign and develop modern web applications using React and TypeScript. \nBuild reusable and maintainable front-end components using HTML/CSS and component libraries such as Material UI. \nDevelop backend services and APIs using Python and FastAPI. \nBuild and configure application functionality within a Databricks-based environment. \nWork with Databricks Apps as part of the application layer. \nIntegrate front-end applications with backend services and data platforms. \nImplement secure authentication and authorisation mechanisms. \nWork with OAuth 2.0, SSO, service principals and role-based access control (RBAC). \nContribute to solution and technical design activities. \nSupport environment and platform setup and configuration. \nWork with data models, data ingestion and integrations. \nBuild application workflows and system-enabled controls. \nSupport the development of reporting and business intelligence outputs. \nParticipate in system integration testing (SIT) and regression testing. \nSupport UAT and end-to-end testing activities. \nWork closely with technical, data and architecture stakeholders. \nContribute to troubleshooting, optimisation and continuous improvement of the solution. \nWymagania\nMUST-HAVE EXPERIENCE\nStrong commercial experience with React.\nStrong experience with TypeScript.\nStrong experience with Python.\nHands-on experience building APIs/services with FastAPI.\nGood understanding of modern web application architecture.\nPractical experience with enterprise authentication and authorisation.\nExperience with OAuth 2.0 and SSO.\nUnderstanding of RBAC and controlled access to enterprise applications.\nExperience working with user authentication and/or service-principal authentication.\nAbility to work across both front-end and back-end layers.\nExperience developing secure, production-grade applications.\nGood understanding of REST APIs and application integrations.\nNICE-TO-HAVE EXPERIENCE\nHands-on experience with Databricks Apps.\nExperience working with the Databricks platform.\nExperience with Material UI or another modern component library.\nExperience working with cloud-based data platforms.\nExperience with data ingestion and data modelling.\nExperience in reporting, BI or data-driven applications.\nExperience with workflow-based applications.\nExperience working in large enterprise environments.\nExperience supporting SIT, regression, UAT or E2E testing.\nFamiliarity with enterprise data, reporting or regulatory transformation projects.\nTech stack\nReact\nTypeScript\nPython\nFastAPI\nDatabricks\nBackend\nEnterprise Architect\nSecurity\nWeb applications\nHTML\nCSS\nMaterial UI\nOAuth\nSSO\nRole-based access control\nSystem integration\nTesting\nUAT\nRBAC\nREST API\nUI\nData modelling\nBI\nUser 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