{"id":763359,"url":"https://alion.io/job/rydoo-senior-software-engineer-net-c","title":"Senior Software Engineer .NET C#","company":{"id":446471,"name":"Rydoo","domain":"rydoo.com","url":"https://alion.io/company/rydoo-2","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"C","score":68,"open_postings":18,"ghost_share":0.444,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":63,"computed_at":"2026-10-29T05:49:05Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Antwerp, Belgium"],"countries":["BE"],"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":"C#","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"Agile","optional":true},{"name":"Angular","optional":true},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"GCP","optional":true},{"name":"JavaScript","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-03-16T00:00:00Z","employer_posted_date":"2026-03-16","last_verified_at":"2026-10-29T17:00:34Z","board_verified":true,"closed_at":null,"days_open":227,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":227},"description":"At Rydoo, we make expense management simple, so people can focus on the important work, not their receipts. More than one million users trust us to submit, approve, and control expenses faster and smarter.\nSemine shares that same mission. Since 2015, the team has been building AI technology that removes the repetitive, time-consuming parts of accounting, helping finance teams work smarter.\nIn July 2025, Semine joined forces with Rydoo to shape the future of financial automation. Together, we’re creating a complete, AI-powered platform that simplifies accounts payable and expense management, helping businesses run simpler, faster and smarter financial operations.\nWe’re a global team of +200 people who believe great tech should make life easier. If you have big ideas and want to build something that actually helps people, you’ll fit right in.\nRydoo in a snapshot\nAmbitious international team\n33 nationalities speaking over 15 languages\n240+ employees across multiple countries\nEasy-to-use spend management app available on iPhone and Android\nSupporting over 10,000+ clients and 1 million+ users worldwide\n4.6 employer score on Glassdoor\nHybrid work policy\nThe Role\nAt Rydoo, we build smart, simple solutions that help people spend less time on expenses and more on what matters.\nAs a Senior Software Engineer, you will:\nWork in one of our squads, a cross-functional, autonomous team.\nShape the core of our product - designing and extending systems that make expense management faster and smarter for thousands of users worldwide.\nBring valuable features into production and follow up on their performance and maintenance.\nDesign and implement REST APIs.\nContribute on some front-end features.\nHelp architect several of our microservices.\nDesign and write automated tests.\nSetup infrastructure and pipelines via Infrastructure as Code (IaC).\nRequirements\nSeveral years of experience with backend development.\nExcellent knowledge of .NET, C#.\nGood knowledge of Entity Framework (or any ORM like NHibernate), SQL Server or similar.\nA team player with a passion for writing clean and testable code within a cross-functional team.\nExperience in optimising the performance and scalability of applications to support our ever-growing user base.\nExperience with Service Oriented Architecture using Service Bus to connect everything is a plus.\nKnowledge of Azure Cloud (or AWS, GCP) is a plus.\nSome experience with Angular is a plus, but having the curiosity and willingness to learn front-end technologies is also much appreciated.\nAgile and DevOps experience is a plus.\nExperience with LLMs is a plus.\nAbility to stay up-to-date with industry trends, best practices, and emerging technologies to continuously improve our development processes and drive innovation.\nA degree in computer sciences or a related field is preferred, but any equivalent experience is just as valuable.\nBenefits\nNext to our amazing team, informal & international company culture and our mission to become the number 1 spend and invoice management platform in Europe, we offer some nice benefits that make working at Rydoo / Semine even more fun:\nA competitive package, including salary and benefits\nUpskilling through training and coaching programs\nHybrid Work Policy\nProfessional freedom and a flexible work environment\nRegular company and team events\nWonderful international team with more than 33 different nationalities\nSpectacular onboarding program for all new joiners\nWhy Join Us\nAt Rydoo / Semine, we celebrate diversity and are committed to creating an inclusive environment for all employees. We value and encourage ongoing learning opportunities and career progression.\nEven if you don't tick every box but see yourself contributing, we encourage you to apply. We're more interested in finding a well-rounded individual with a can-do attitude. Your passion, dedication and desire to learn are what matter most to us.\nCheck us out\nLinkedIn: https://www.linkedin.com/company/rydoo\nGlassdoor: http://bit.ly/2UujjWJ\nInstagram: https://www.instagram.com/wearerydoo/\nYouTube: https://www.youtube.com/channel/UCTZYj7vm_ZcsGFL18jWHt_A\nInside Rydoo Blog: https://www.rydoo.com/inside-rydoo/","description_format":"text","description_chars":4171,"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":["Flexible schedule","Hybrid work"],"hiring_locations":[{"name":"Belgium","iso":"BE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Accounting & Tax Software","Procurement & Spend Management"],"lifecycle":[{"event":"open","at":"2026-09-11T19:11:30Z"},{"event":"open","at":"2026-09-25T15:53:00Z"}],"visa":[],"liveness":{"score":8,"band":"cold","label":"Long shot","p_open":1,"p_active":0.3,"p_room":0.28,"age_days":227,"expected_fill_days":63,"reasons":["conf:1","ghost","win:tail","crowd:"],"computed_at":"2026-10-29T05:49:05Z"},"pay":null,"html_url":"https://alion.io/job/rydoo-senior-software-engineer-net-c","json_url":"https://alion.io/job/rydoo-senior-software-engineer-net-c.json","meta":{"generated_at":"2026-10-29T17:18:06Z","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":25865,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"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":446471},"rest":"https://alion.io/mcp/rest/get_company?id=446471"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Frydoo-senior-software-engineer-net-c"},{"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%2Frydoo-senior-software-engineer-net-c"},{"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%2Frydoo-senior-software-engineer-net-c"},{"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/rydoo-senior-software-engineer-net-c\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frydoo-senior-software-engineer-net-c"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":763359}},{"tool":"search_jobs","arguments":{"company":"rydoo.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":763359},"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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