{"id":3351279,"url":"https://alion.io/job/coderio-senior-full-stack-engineer-c","title":"Senior Full-Stack Engineer C#","company":{"id":16386,"name":"Coderio","domain":"coderio.com","url":"https://alion.io/company/coderio","size_band":"201-500","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":83,"open_postings":3,"ghost_share":0,"stale_share":0.667,"repost_share":0,"time_to_fill_p50_days":33,"computed_at":"2026-10-28T05:59:10Z"}},"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":["Miami, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":109000,"max_usd":202000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":3667},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Agile","optional":false},{"name":"C#","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Scrum","optional":false},{"name":"Rest API","optional":true}],"status":"live","first_seen_at":"2026-10-26T13:35:22Z","employer_posted_date":"2026-10-26","last_verified_at":"2026-10-29T02:14:12Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"About Us\nCoderio designs and delivers scalable digital solutions for global companies. We combine strong technical expertise with a product mindset to lead complex software initiatives end-to-end. We work with international clients, value autonomy and clear communication, and build long-term partnerships through technical excellence.\nMore information: http://coderio.com\nThe Project\nWe are looking for a Senior Full-Stack Engineer to join a three-person team at a leading financial institution. The project replaces a legacy system of 16 workflows: a web portal where branch users submit requests, and a backend that sends them to other systems, receives responses, updates statuses and manages approvals. Delivery dates are aggressive, so we need someone who can contribute quickly after onboarding.\nResponsibilities\nDesign and build backend services in C# / .NET, applying clean architecture and engineering best practices.\nDeliver features end to end: APIs, integrations with other systems, approval-workflow logic and the React web portal.\nWork in an Agile team with two-week sprints and the usual ceremonies.\nAnswer teammates' technical questions and take part in code reviews.\nWrite and maintain unit and regression tests.\nDocument technical decisions and collaborate with business stakeholders and teams that own other systems.\nRequirements\n5+ years of hands-on software development experience in C# / .NET (7+ preferred), building applications rather than only maintaining them.\nApplied knowledge of clean architecture: SOLID principles, separation of concerns (SRP), DRY and domain-driven design.\nProven experience building an application from scratch.\nWorking knowledge of React and CSS (no UI design specialization required).\nExperience writing unit and regression tests.\nExperience working in Agile / Scrum teams.\nStrong in-person communication, teamwork and the ability to adapt to a corporate environment.\nAbility to work in a hybrid model from the Miami Lakes, FL office.\nProfessional level of English [confirm with the client].\nNice to Have\nExperience in banking or financial services.\nExperience integrating systems through REST APIs and messaging.\nExperience with workflow and approval processes.\nFamiliarity with UI templates such as Mantis.\nA genuine passion for programming and for tackling a challenging, high-volume project.\nBenefits\nHybrid collaboration in a dynamic and fast-paced environment in the Miami / Fort Lauderdale area.\nLong-term contract engagement with high impact and autonomy.\nStrategic and high-visibility role within a modern engineering culture.\nOpportunity to influence technical strategy, especially regarding modern event-driven architectures and AI integrations.\nCollaborative international team with strong technical leadership.\nWhy Join Coderio?\nAt Coderio, we value talent and excellence. While we are primarily a remote-first company, this specific strategic role offers the opportunity to work directly on-site to drive high-stakes initiatives. We are passionate about technology, collaboration, and fair compensation. We offer an inclusive and challenging environment with real growth opportunities. If you are motivated to design solutions that make a difference, we are waiting for you. 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