{"id":708815,"url":"https://alion.io/job/jex-senior-fullstack-developer-c-net-angular","title":"Senior Fullstack Developer (C#/.NET & Angular)","company":{"id":678634,"name":"JEX","domain":"jex.nl","url":"https://alion.io/company/jex-2","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitee","truth_index":{"grade":"B","score":72,"open_postings":13,"ghost_share":0.462,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":39,"computed_at":"2026-10-31T05:58:55Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Rotterdam, Netherlands"],"countries":["NL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":5500,"max":6500,"currency":"EUR","period":"month","gross":null,"usd_annual":87600},"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":"Azure","optional":false},{"name":"C#","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"MS SQL","optional":false},{"name":"Rest API","optional":false},{"name":"RxJS","optional":false},{"name":"Sass","optional":false},{"name":"Tailwind CSS","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-03T13:11:01Z","employer_posted_date":"2026-09-03","last_verified_at":"2026-10-31T13:54:37Z","board_verified":true,"closed_at":null,"days_open":58,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":57},"description":"Backend bouwen. Frontend verfijnen. Beide even goed beheersen - dat is de kunst van de Senior Fullstack Developer die wij zoeken. JEX bouwt AI-powered sales software. Ons hoofdproduct heet JEX CORE en automatiseert koude acquisitie voor ondernemers en salesteams: van targeting en outreach tot leadbeheer en campagneoptimalisatie.\nAlles draait op een cloud-based microservice landschap, gebouwd voor snelheid en schaalbaarheid. Jij schuift moeiteloos tussen C#, .NET en Angular. De ene dag bouw je een nieuwe service, de andere dag schaaf je een component bij tot 'ie precies goed voelt. Kwaliteit en tempo gaan bij jou hand in hand.\nDit vind jij leuk om te doen\nWebapplicaties technisch uitdenken en bouwen. Van database tot scherm;\n\nWerken in een multidisciplinair scrumteam met front-end developers, back-end developers, software architecten, testers en UX designers;\n\nSlimme AI-oplossingen implementeren binnen onze software development lifecycle;\n\nMeedenken over architectuur en technische keuzes, en die terugkoppelen aan de software architect;\n\nUnittesten en integratietesten opzetten met xUnit;\n\nHet productlandschap samen met je team een niveau hoger tillen.\n\nHier herken jij jezelf in\nCommunicatief sterk. Snel van begrip. En technisch goed onderlegd zonder te vergeten dat software uiteindelijk voor mensen gemaakt wordt. Daarbij beschik je over o.a. het volgende:\nMinimaal hbo werk- en denkniveau;\n\nMinimaal vijf jaar ervaring in een vergelijkbare rol;\n\nKennis van C# .NET, REST API, Angular/TypeScript en HTML/CSS;\n\nErvaring met RxJS;\n\nBasiskennis van Entity Framework, MSSQL en SCSS;\n\nBekend met Clean Architecture en S.O.L.I.D.;\n\nEen sterke Agile mindset;\n\nJe spreekt en schrijft Nederlands op professioneel niveau;\n\nKennis van Azure, Tailwind en Nx is een pré.\n\nMis je iets in dit rijtje, maar heb je een sterk verhaal waarom de functie bij je past? In potentiële JEX'ers investeren we graag.\nWat biedt JEX\nBij JEX krijg je de kans om jezelf continu uit te dagen en te ontwikkelen. Daarnaast mag je ook minimaal onderstaande van ons verwachten:\nEen salaris tussen de €5.500 en €6.500 (o.b.v. je ervaring, skills en potentie);\n\nEen riante optieregeling;\n\nEen passende mobiliteitsvergoeding;\n\n30 vakantiedagen o.b.v. 40 uur en 8% vakantiegeld;\n\nEen premievrije pensioenregeling;\n\nInwisselbare feestdagen en de optie om extra vrije dagen bij te kopen of te verkopen;\n\nEen laptop en telefoon van de zaak;\n\nElke dag ontbijt, uitgebreide lunch en onbeperkt fruit, snacks en fris;\n\nEen gym en gebedsruimte in ons prachtige kantoor;\n\nHele toffe events op interne én externe locaties;\n\nEen inhouse skybar waar we de gezelligste borrels hebben;\n\nDiverse opleidingsmogelijkheden, wij moedigen je aan om de beste versie van jezelf te worden.\n\nRequirements\nHier kom je terecht\nAls techbedrijf maken we het werk van uitzendbureaus, werkgevers, freelancers en werkzoekenden makkelijker en efficiënter. Hoe? Met onze innovatieve software en services. Van onze AI-oplossingen en consultancy-diensten tot uitzendsoftware en backoffice dienstverlening.\nOns hoofdproduct is JEX CORE: AI-powered sales software waarmee ondernemers en salesteams structureel warme leads binnenhalen zonder extra mensen aan te nemen. Jij bouwt mee aan het fundament daaronder. Korte lijnen, hoog tempo en collega's die net zo serieus zijn over kwaliteit als over de vrijdagmiddagborrel op onze skybar.\nEnthousiast?\nDat snappen we! Deel je cv en motivatie en krijg binnen twee werkdagen na je sollicitatie bericht van ons. We zijn erg benieuwd naar wat jou bijzonder maakt. Tip: kort is de kunst, krachtig de key!","description_format":"text","description_chars":3588,"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":[{"language":"German","level":"Advanced (C1)","optional":false},{"language":"Dutch","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Accounting & Tax Software"],"lifecycle":[{"event":"open","at":"2026-09-11T04:14:24Z"}],"visa":[],"liveness":{"score":35,"band":"fade","label":"Fading","p_open":1,"p_active":0.639,"p_room":0.55,"age_days":57,"expected_fill_days":39,"reasons":["conf:2","win:tail"],"computed_at":"2026-10-31T05:58:55Z"},"pay":{"stated_usd_annual":87600,"is_top_pay":false},"html_url":"https://alion.io/job/jex-senior-fullstack-developer-c-net-angular","json_url":"https://alion.io/job/jex-senior-fullstack-developer-c-net-angular.json","meta":{"generated_at":"2026-10-31T14:31:57Z","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":22615,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-01T00:00:00Z"}},"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":678634},"rest":"https://alion.io/mcp/rest/get_company?id=678634"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fjex-senior-fullstack-developer-c-net-angular"},{"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%2Fjex-senior-fullstack-developer-c-net-angular"},{"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%2Fjex-senior-fullstack-developer-c-net-angular"},{"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/jex-senior-fullstack-developer-c-net-angular\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fjex-senior-fullstack-developer-c-net-angular"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":708815}},{"tool":"search_jobs","arguments":{"company":"jex.nl","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":708815},"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"}}