{"id":2427455,"url":"https://alion.io/job/deloitte-senior-fullstack-software-engineer-net-react","title":"Senior Fullstack Software Engineer (.NET & React)","company":{"id":2114233,"name":"Deloitte Luxembourg","domain":"deloitte.lu","url":"https://alion.io/company/deloitte-lu","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career sitemap","truth_index":{"grade":"B","score":75,"open_postings":18,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-15T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Luxembourg City, Luxembourg"],"countries":["LU"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":72000,"max_usd":211000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":6933},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Agile","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Clean Architecture","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-09-09T00:00:00Z","employer_posted_date":"2026-09-09","last_verified_at":"2026-10-15T05:23:16Z","board_verified":true,"closed_at":null,"days_open":36,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":36},"description":"On site\nFull time\nYour future team\nJoin our Digital Factory at Deloitte Luxembourg - a multidisciplinary team of ~85 technology professionals and financial domain experts working together to build high-impact digital solutions for the financial sector. We develop modern, data-driven products serving clients in banking, investment funds, and asset management, in a collaborative Agile environment with a strong focus on engineering quality and continuous improvement.\nAs a Senior Engineer, you will be a key technical pillar of the team - owning solutions end-to-end, shaping our engineering practices, and helping grow the people around you.\nYour advantages of joining us\nWork that has real impactBuild and architect data-intensive applications used by major financial institutions, leveraging modern engineering standards and AI-enabled tooling. Your decisions will directly influence product quality and client outcomes.\n\nTechnical leadership & career growth Take ownership of architectural decisions and technical direction, with a clear path toward Lead Engineer and Architect roles. Benefit from a dedicated learning budget, internal tech talks, and access to Deloitte's global knowledge network.\n\nGlobal reach, local roots\nContribute to international projects and collaborate with diverse teams across Deloitte's global network, all while being anchored in Luxembourg - one of Europe's leading financial centers.\n\nFlexible, inclusive culture\nWe trust our people. Enjoy flexible hybrid working arrangements, a culture where your voice genuinely shapes how we work, and a team that values both performance and wellbeing.\n\nA team that builds together Work side by side with financial experts, product owners, and fellow engineers in a startup-minded environment within a globally recognized firm.\n\nHow you'll contribute to our success\nEngineering & Architecture\nArchitect, develop, and own robust full-stack applications from concept to production, with a strong focus on scalability, resilience, and maintainability in a financial services context\nDesign and implement high-performance, data-intensive APIs, processing workflows, and integrations using C#/.NET and SQL Server\nDefine and apply sound architectural patterns (e.g., clean architecture, CQRS, event-driven design) appropriate to the problem at hand\nBuild scalable, performant user interfaces with React, applying strong component architecture and state management best practices\nQuality & Engineering Standards\nDefine, promote, and enforce engineering standards across the team: code reviews, testing strategies (unit, integration, E2E), and CI/CD pipeline ownership\nOwn non-functional requirements including performance, security, and observability\nProactively identify technical debt and drive pragmatic remediation plans\nLeadership & Collaboration\nAct as a technical mentor for junior and mid-level engineers, supporting their growth through pairing, feedback, and knowledge sharing\nLead technical discussions and drive consensus across engineers and business stakeholders\nTranslate complex business requirements into clear, actionable technical designs\nContribute to hiring by participating in technical interviews and candidate assessments\nCommunicate delivery risks, scope, and progress transparently to the team and project leads\nAgile & Continuous Improvement\nChampion Agile best practices within the team, contributing to sprint ceremonies with a focus on sustainable delivery and continuous improvement\nPropose and implement improvements to team processes, tooling, and ways of working\nYour skills\nUniversity degree in Computer Science, Software Engineering, or another relevant field.\nFluent English is required. French is considered an asset.\n4 to 8 years of hands-on experience in software development, with a proven track record of delivering complex, production-grade full-stack applications. Experience in the financial sector is a plus.\nTechnical skills : C#/.NET (Core), SQL/relational databases, React development, API design, CI/CD definition.Nice-to-have: Cloud platforms, Containerization, Event-driven architecture, AI integration.\nTechnical leadership: Ability to lead design discussions, make well-reasoned decisions under ambiguity, and bring others along\nMentorship mindset: Genuine interest in growing the people around you through coaching, feedback, and knowledge sharing\nOwnership: You drive delivery, raise risks early, unblock your team, and take pride in what you ship\nInterested? Please submit your resume in English\nGet to know more about Deloitte on our LinkedIn page (#DeloitteLU), Instagram page, YouTube page or website.\nWith more than 2,600 employees and 98 nationalities, Deloitte Luxembourg is one of the Grand Duchy's largest, strongest and oldest professional services firms. For more than 75 years, our talented teams have been serving clients in various industries delivering high added-value offerings to national and international clients in audit and assurance, consulting, financial advisory, risk advisory, tax, and related services. Deloitte Luxembourg is part of the global Deloitte network.\nDeloitte provides leading professional services to nearly 90% of the Fortune Global 500® and thousands of private companies. Our people deliver measurable and lasting results that help reinforce public trust in capital markets and enable clients to transform and thrive. Building on its 180+-year history, Deloitte spans more than 150 countries and territories. Learn how Deloitte’s over 470,000 people worldwide work together every day to make an impact that matters at www.deloitte.com.","description_format":"text","description_chars":5602,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Hybrid work"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Financial Services","Professional Services"],"lifecycle":[{"event":"open","at":"2026-10-13T08:05:52Z"}],"visa":[],"liveness":{"score":21,"band":"cold","label":"Long shot","p_open":1,"p_active":0.459,"p_room":0.45,"age_days":36,"expected_fill_days":22,"reasons":["conf:0","stale_co","velocity","win:tail"],"computed_at":"2026-10-15T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/deloitte-senior-fullstack-software-engineer-net-react","json_url":"https://alion.io/job/deloitte-senior-fullstack-software-engineer-net-react.json","meta":{"generated_at":"2026-10-15T09:22:54Z","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":14071,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"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":2114233},"rest":"https://alion.io/mcp/rest/get_company?id=2114233"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fdeloitte-senior-fullstack-software-engineer-net-react"},{"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%2Fdeloitte-senior-fullstack-software-engineer-net-react"},{"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%2Fdeloitte-senior-fullstack-software-engineer-net-react"},{"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/deloitte-senior-fullstack-software-engineer-net-react\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdeloitte-senior-fullstack-software-engineer-net-react"}]}