{"id":1008276,"url":"https://alion.io/job/zipdev-senior-fullstack-developer-backend-focus","title":"Senior Fullstack Developer (Backend focus)","company":{"id":6611,"name":"Zipdev","domain":"zipdev.com","url":"https://alion.io/company/zipdev","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"remote","remote_scope":"stated_regions","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["AR","BR","CO","MX","AI","AG","AW","BS","BB","BZ","BM","BO","VG","BQ","KY","CL","CR","CW","DM","DO","EC","SV","FK","GF","GD","GP","GT","GY","HT","HN","JM","MQ","MS","NI","PA","PY","PE","PR","KN","LC"],"hiring_countries_total":49,"salary":null,"salary_estimate":{"min_usd":89000,"max_usd":205000,"period":"year","method":"role_seniority_country_cell","sample_n":8},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"AI Agents","optional":false},{"name":"C#","optional":false},{"name":"Claude","optional":false},{"name":"Claude Code","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"LLM","optional":false},{"name":"Machine Learning","optional":false},{"name":"MVVM","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"Azure","optional":true}],"status":"live","first_seen_at":"2026-11-06T00:00:00Z","employer_posted_date":"2026-11-06","last_verified_at":"2026-11-07T20:14:37Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":1,"flags":[],"days_open":1},"description":"We are seeking a Senior Full-Stack Software Developer to join the Product Development Team of our client and help build, improve, and maintain AI-enabled product capabilities. This is a backend-focused role that also requires strong hands-on experience with React and modern web technologies.\nYou will work closely with the Development Manager, Product Owner, Interaction Design team, and other stakeholders to translate product requirements and user workflows into high-quality, reliable software.\nA major focus of the role is improving code quality, writing maintainable and well-documented code, testing your own work, and using AI development tools such as Claude Code to support implementation and code reviews.\nKey Responsibilities\nDesign, develop, test, and refine software implementations for a product environment.\nBuild and maintain backend services and APIs using .NET, while contributing to the React frontend.\nDevelop AI-enabled capabilities, including LLM-powered features, intelligent workflows, automation, recommendations, and integrations with AI platforms/APIs.\nWrite clean, maintainable, well-documented, and unit-testable code.\nDevelop and maintain unit tests using Test-Driven Development and other appropriate testing practices.\nUse Claude Code as part of the development workflow, including mandatory Claude-assisted code reviews.\nParticipate in formal code reviews and make improvements based on feedback.\nCreate software implementation designs and technical documentation.\nDevelop architecture documentation, database schema diagrams, entity relationship diagrams, and sequence diagrams.\nWork with SQL databases, including database design and data-related implementation.\nParticipate in planning sessions and provide estimates for development efforts.\nDemonstrate completed implementations to stakeholders and incorporate feedback.\nDevelop software installation packages for customer workstations and servers when required.\nIdentify opportunities to improve code quality, development practices, performance, and maintainability.\nContribute to technical problem-solving and the design of practical, scalable solutions.\nMust be based in Latam. \nRequirements\n8+ years of professional software development experience.\nStrong experience developing software products in a product development environment.\nStrong backend development experience with .NET / C#.\nStrong hands-on experience with React.\nStrong knowledge of JavaScript, HTML5, and CSS3.\nExperience developing and consuming RESTful APIs.\nStrong SQL and database development experience.\nExperience with JSON and XML data structures.\nExperience with distributed architectures and asynchronous request handling.\nStrong understanding of software design patterns and modern software architecture.\nExperience with patterns such as MVC and MVVM.\nExperience writing and maintaining unit tests for your own code.\nStrong understanding of software quality, maintainability, and development best practices.\nExperience with Git or SVN.\nExperience with browser-based and responsive web applications.\nPractical experience with AI technologies, including Large Language Models (LLMs), Agentic AI, and/or Machine Learning.\nExperience using Claude Code, including AI-assisted development and code review workflows.\nStrong technical documentation and written communication skills.\nAnalytical and pragmatic approach to problem-solving.\nNice to have\n5+ years of experience as a project lead or team lead in software development.\nExperience mentoring or leading development teams.\nMaster's degree in Computer Science or a related field.\nExperience developing software for regulated or highly controlled environments.\nExperience creating customer-facing software installation packages.\nAzure experience\nBenefits\nWork remotely Monday - Friday, 40 hours a week (no weekends)\nDid we mention it's REMOTE?!!\nOne of our core values at Zipdev is \"Be authentic.\" that's why we encourage you to answer the application form in your own words; we are interested in getting to know you, not a digital assistant.\nWondering how our remote environment or our payment method work? We've put together some helpful answers in our FAQs at the bottom our our Take a look and let us know if you have any other questions!","description_format":"text","description_chars":4255,"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":[],"hiring_locations":[{"name":"Argentina","iso":"AR","kind":"region"},{"name":"Brazil","iso":"BR","kind":"country"},{"name":"Colombia","iso":"CO","kind":"country"},{"name":"Mexico","iso":"MX","kind":"country"},{"name":"Anguilla","iso":"AI","kind":"region"},{"name":"Antigua and 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