{"id":1158418,"url":"https://alion.io/job/upwork-full-stack-software-engineer-netc-and-react","title":"Full Stack Software Engineer - .NET/C# and React","company":{"id":3606,"name":"Upwork","domain":"upwork.com","url":"https://alion.io/company/upwork","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"B","score":80,"open_postings":6,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":18,"computed_at":"2026-10-01T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Mexico City, Mexico"],"countries":["MX"],"hiring_countries":["MX"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":51000,"max_usd":106000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":8},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"MS SQL","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-23T06:59:52Z","employer_posted_date":"2026-09-23","last_verified_at":"2026-10-01T03:25:23Z","board_verified":true,"closed_at":null,"days_open":8,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":8},"description":"An enterprise client is seeking a Senior Full-Stack Software Engineer to join its engineering organization and help build and modernize a business-critical product catalog platform. The Senior Full-Stack Software Engineer will work across backend services, React frontend applications, and relational data layers while taking ownership of features throughout the full software development lifecycle.\n Work with a lean, senior engineering team responsible for building and modernizing a business-critical product catalog platform.\nDesign, develop and implement scalable full-stack software solutions from specification through deployment and production support.\nBuild backend services, REST APIs, business logic, data models, and React-based user interfaces.\nParticipate in the modernization of the existing catalog platform and contribute to the development of the new technology stack.\nUse AI-driven software development tools such as Claude Code, GitHub Copilot, or Cursor as an integral part of the daily development workflow.\nLeverage AI-assisted tooling for code generation, specification-to-code implementation, automated test creation, and other software development activities.\nWrite and maintain automated tests and ensure software quality throughout the development lifecycle.\nParticipate in peer code reviews and maintain high standards for code quality, architecture, and engineering practices.\nWork closely with Product and Design teams to refine requirements and technical specifications.\nContribute to shared engineering standards, developer tooling, and software development lifecycle improvements.\nImplement logging, monitoring, metrics, and alerting for production services.\nTake ownership of features and services from development through deployment, observability, maintenance, and production support.\nParticipate in an on-call rotation and troubleshoot production issues for services owned by the team.\nRegular practice of CI/CD and continuous improvement of development processes.\nDocument technical decisions, architecture, and implementation details as required.\nMentor less experienced engineers and contribute to the technical direction of the team.\n 8+ years of professional software engineering experience with the ability to work independently and drive technical decisions.\nStrong backend development experience with one or more of the following: C#/.NET, Go, Python, or Java. C#/.NET is the primary technology.\nStrong experience with React or another modern frontend framework.\nStrong knowledge of MS SQL Server or PostgreSQL and relational database concepts.\nStrong knowledge and experience with REST APIs and microservices.\nHands-on experience using AI-assisted software development tools such as Claude Code, GitHub Copilot, or Cursor to deliver production software.\nFull-stack development experience with the ability to work across backend, frontend, and database layers.\nExperience owning software features end-to-end, including requirements, development, testing, deployment, observability, and production support.\nStrong understanding of software design principles, automated testing, code review, and CI/CD practices.\nStrong troubleshooting and problem-solving skills in production environments.\nAbility to collaborate effectively with Product, Design, and other engineering teams.\nStrong communication skills and the ability to articulate technical concepts clearly.","description_format":"text","description_chars":3406,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[{"name":"Mexico","iso":"MX","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Design & Creative","Sales & Marketing"],"lifecycle":[{"event":"open","at":"2026-09-23T22:34:33Z"}],"liveness":{"score":74,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.781,"p_room":0.945,"age_days":7,"expected_fill_days":18,"reasons":["conf:2","velocity","win:mid"],"computed_at":"2026-10-01T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/upwork-full-stack-software-engineer-netc-and-react","json_url":"https://alion.io/job/upwork-full-stack-software-engineer-netc-and-react.json","meta":{"generated_at":"2026-10-02T03:16:45Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":4473,"day_limit":5000,"remaining_today":527,"minute_limit":60,"resets_at":"2026-10-03T00:00:00Z"}}}