{"id":3738329,"url":"https://alion.io/job/twoday-full-stack-developer-modern-backend-frontend","title":"Full Stack Developer – Modern Backend & Frontend","company":{"id":2571774,"name":"Twoday","domain":"twoday.dk","url":"https://alion.io/company/twoday-dk","size_band":"1001-5000","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":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Copenhagen, Denmark"],"countries":["DK"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Angular","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Kubernetes","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"TypeScript","optional":false},{"name":"Java","optional":true}],"status":"live","first_seen_at":"2026-11-04T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-11-04T00:00:00Z","board_verified":false,"closed_at":null,"days_open":1,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":1},"description":"Permanent position at Twoday | Copenhagen\nFull Stack Developer – Modern Backend & Frontend\nTwoday is looking for experienced Full Stack Developers to work on business-critical digital solutions within the Danish healthcare sector.\nYou will join our Digital Engineering organisation and contribute to the development, modernisation and maintenance of complex healthcare systems, working closely with developers, architects, testers and DevOps specialists across multiple suppliers.\nYour role\nYou will work across the full technology stack, from backend services and integrations to frontend applications, testing and production support.\nYour responsibilities will include:\nDeveloping and maintaining backend services, REST APIs and modern frontend applications\n\nBuilding secure, reliable integrations between systems\n\nWorking with relational databases and data-driven applications\n\nImplementing authentication, authorisation and secure API communication\n\nContributing to event-driven solutions and asynchronous processing\n\nDeveloping automated tests and supporting CI/CD and deployments\n\nTroubleshooting production issues and improving system performance and stability\n\nCollaborating across teams and suppliers on technical design, documentation and delivery\n\nWhat we're looking for\nSolid professional fullstack development experience\n\nStrong backend experience with C#/.NET, Java/Spring Boot or comparable technologies\n\nExperience with JavaScript/TypeScript and modern frontend frameworks such as React, Angular or Vue\n\nExperience with REST APIs, integrations and relational databases\n\nUnderstanding of OAuth2/OpenID Connect, secure coding and API security\n\nKnowledge of event-driven architecture, idempotency and asynchronous processing\n\nExperience with automated testing, Git and CI/CD\n\nExperience working in complex enterprise environments\n\nFluent Danish, both written and spoken\n\nExperience with Docker, Kubernetes, Infrastructure as Code and multi-supplier delivery environments is an advantage.\nThe employment\nYou will be permanently employed by Twoday, with your first assignment supporting critical public-sector healthcare systems in Copenhagen.\nThe assignment requires full-time onsite presence at the customer location.\nYou will work in a collaborative technical environment where quality, security, knowledge sharing and responsibility for reliable software delivery are essential.\nWe look forward to hearing from you.\nWorking at Twoday\nTwoday is a leading technology consulting company specializing in applied AI and advanced engineering. With around 2,300 experts in AI, data, digital engineering, and cloud engineering, we cut through complexity, remove uncertainty, and prove the value of technology.\nOur purpose is to create a better tomorrow through AI and technology. We strengthen private and public organizations across energy and utilities, financial services and insurance, industrials and manufacturing, health and life sciences, and government.\nHowever, our greatest strength isn't the technology we work with. It's the people behind it. Every day, they bring together expertise, curiosity, and determination to help our customers solve complex challenges and create lasting value.\nDiversity and inclusion\nWe are committed to building an inclusive and diverse workplace where everyone is treated with respect and has equal opportunities. Our recruitment decisions are based on competencies, experience, and individual merit.\nDon’t meet all the requirements? Many candidates hesitate to apply unless they meet every qualification. We are looking for people who are engaged, meet most of the criteria, and are motivated to grow in the role. If this role interests you and you believe you could be a good fit, we encourage you to apply.","description_format":"text","description_chars":3758,"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":["Artificial Intelligence","Financial Services","Information Technology"],"lifecycle":[{"event":"open","at":"2026-11-04T10:42:06Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":24,"reasons":["seen:1","velocity","win:early"],"computed_at":"2026-11-05T05:54:30Z"},"pay":null,"html_url":"https://alion.io/job/twoday-full-stack-developer-modern-backend-frontend","json_url":"https://alion.io/job/twoday-full-stack-developer-modern-backend-frontend.json","meta":{"generated_at":"2026-11-05T15:13:06Z","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":19784,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-06T00:00:00Z"}},"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":2571774},"rest":"https://alion.io/mcp/rest/get_company?id=2571774"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftwoday-full-stack-developer-modern-backend-frontend"},{"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%2Ftwoday-full-stack-developer-modern-backend-frontend"},{"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%2Ftwoday-full-stack-developer-modern-backend-frontend"},{"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/twoday-full-stack-developer-modern-backend-frontend\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftwoday-full-stack-developer-modern-backend-frontend"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3738329}},{"tool":"search_jobs","arguments":{"company":"twoday.dk","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3738329},"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"}}