{"id":3974929,"url":"https://alion.io/job/customertimes-jr-186652-full-stack-developer-senior","title":"JR-186652 Full stack Developer Senior","company":{"id":3808977,"name":"Customertimes","domain":"customertimes.com","url":"https://alion.io/company/customertimes","size_band":"201-500","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"junior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":{"label":"US time zones","utc_offset_min":-8,"utc_offset_max":-5},"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["AR","BR","CO","MX","CR","PE","UY"],"hiring_countries_total":7,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C#","optional":false},{"name":"Git","optional":false},{"name":"SQL","optional":false},{"name":"AWS","optional":true},{"name":"Datadog","optional":true},{"name":"JavaScript","optional":true},{"name":"Jira","optional":true},{"name":"Python","optional":true},{"name":"React Native","optional":true},{"name":"React.js","optional":true},{"name":"Splunk","optional":true}],"status":"live","first_seen_at":"2026-11-01T12:41:28Z","employer_posted_date":null,"last_verified_at":"2026-11-01T12:41:28Z","board_verified":false,"closed_at":null,"days_open":8,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":8},"description":"Job Description:We are seeking a Senior Full Stack Engineer (.NET / React) to join a US-based healthcare client in the oncology domain. You will contribute to the maintenance, modernization, and continuous evolution of an Electronic Health Record (EHR) platform used in cancer treatment practices. The system manages sensitive patient and clinical data, including medical history, lab results, treatment plans, allergies, and appointment scheduling, requiring strong attention to performance, scalability, and data integrity.\nThis is a full-stack role with an expected split of approximately 60% backend (.NET) and 40% frontend (React), depending on project needs. You will work across both legacy and modern components, delivering new features while supporting system improvements, and collaborating closely with cross-functional teams in an agile environment to ensure a reliable and secure healthcare solution.Locations:\nBrazil\n\nColombia\n\nArgentina\n\nPeru\n\nUruguay\n\nCosta Rica\n\nMexico\n\nRequirements:\nMust-Have Skills:\nStrong experience in .NET (C#) development;\n\nFamiliarity with ASPX Web Forms or willingness to learn quickly;\n\nProfessional experience with React.js in a production environment;\n\nSolid working knowledge of SQL and relational databases;\n\nExperience using Git for version control.\n\nNice-to-Have Skills:\nExperience with Python for basic scripting and small updates;\n\nAbility to navigate the AWS Console for basic debugging and log review;\n\nFamiliarity with React Native and Apple App Store deployments;\n\nExposure to monitoring tools like Splunk or Datadog;\n\nOpen to working with and improving legacy codebases;\n\nWilling to gradually contribute to modernization initiatives.\n\nJob Responsibilities:\n\nDevelop and maintain features in a .NET (C#)-based application;\n\nWork with legacy ASPX Web Forms and participate in their gradual migration to React;\n\nHandle tickets independently based on Jira tasks;\n\nWrite, debug, and optimize SQL queries;\n\nOccasionally make small updates or bug fixes in Python (rare);\n\nUse the AWS Console to troubleshoot errors, review logs, and verify service statuses;\n\nCollaborate with a generalist team on end-to-end solutions spanning frontend and backend;\n\nParticipate in a rotating on-call schedule (approx. every 5 weeks, mostly during U.S. business hours);\n\nOptional: assist with maintenance tasks for a React Native iOS app (small, infrequent updates).\n\nWhat We Offer:\nCompetitive salary;\n\n100% remote opportunity;\n\nPaid time off (PTO), sick leave, and national holidays. 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