{"id":2523500,"url":"https://alion.io/job/rethinkfirst-senior-full-stack-developer-ai-first-rethinkfirst","title":"Senior Full Stack Developer - AI First - RethinkFirst","company":{"id":1904740,"name":"RethinkFirst","domain":"rethinkfirst.com","url":"https://alion.io/company/rethinkfirst","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"JazzHR","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":84000,"max_usd":208000,"period":"year","method":"global_role_seniority_cell","sample_n":6426},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Azure","optional":false},{"name":"C#","optional":false},{"name":"Claude","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"TypeScript","optional":false},{"name":"Angular","optional":true},{"name":"AWS","optional":true},{"name":"Azure DevOps","optional":true},{"name":"CI/CD","optional":true},{"name":"Docker","optional":true},{"name":"Kubernetes","optional":true},{"name":"NgRx","optional":true},{"name":"Redis","optional":true},{"name":"SQL","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-10-14T11:46:53Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-10-14T20:11:26Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"About RethinkFirst\nReThinkFirst is on a mission to inspire hope and power potential. Founded in 2008 and headquartered in NYC, RethinkFirst is a pioneer and market leader in behavioral and mental health technology.\nDeveloped by nationally recognized experts in the field, Rethink’s award-winning online solutions feature comprehensive video-based training and education programs and a sophisticated behavior intervention planning tool for individuals and caregivers. Rethink’s offerings include individualized assessments, online skills-based activities, access to remote clinician-led consultations, and more.\nThe Rethink First platform is used by Fortune 500 companies, school districts, government agencies, public and private behavioral health providers, and families caring for individuals with developmental disabilities worldwide.\nWe are hiring for a Full-Stack Senior .NET Developer to help deliver cloud-based applications and infrastructure to our growing customer base. The candidate will develop, design, test and deploy websites as well as support and maintain existing functionality. They should be experienced and productive with Microsoft development technologies, have a solid understanding of design patterns, object orientated programming and SOLID best practices. We take an AI-first approach to engineering: AI coding tools are the default way we work, and we expect developers to reach for them first on everything from scaffolding and refactoring to debugging, testing, and code review. Experience in health IT or insurance industry a plus.\nTechnology stack\nC#, .NET & .NET Core, SQL, Redis, Web API, JavaScript, HTML/CSS, Angular, TypeScript, Microservices, XUnit, Azure, CI/CD, Git, NGRX, OAuth. \nAI Tooling: Cursor, Claude, GitHub Copilot. \nPreferred Skills: Azure DevOps, Docker, Kubernetes, Terraform. \nResponsibilities\nDesign and build applications, micro-services, and infrastructure for the Rethink First platform. \nEnsure the performance, quality, and responsiveness of applications. \nCollaborate with a team to define, design, and ship new features. \nIdentify and correct bottlenecks and fix bugs. \nHelp maintain code quality, organization, and automation. \nUse AI development tools such as Cursor, Claude, and GitHub Copilot as your day-to-day toolset, and help the team get more out of them without compromising code quality or security. \nAnalyze and optimize applications for efficiency and performance. \nPromote robust and maintainable code, clear documentation, and deliver high-quality work on a tight schedule. \nRequirements\nBachelor's degree in Computer Science \n5+ years’ development experience \nProficient with C#, JavaScript, and TypeScript \n3+ years’ experience with Azure or AWS cloud technologies. \nExperience developing and deploying IaC. \nDeep understanding of domain and event driven design. \nKnowledge of modern architecture patterns. \nUnderstanding of design principles, algorithms, and data structures. \nProficient understanding of code versioning tools such as Git. \nExperience writing and automating unit tests and integration tests. \nDaily hands-on use of AI development tools such as Cursor, Claude, or GitHub Copilot as a primary part of your workflow. \nDemonstrated fluency in AI-assisted workflows - prompting effectively, reviewing and correcting AI-generated code, and knowing when not to rely on it. \nThis Job Is Ideal for Someone Who Is\nDependable -- more reliable than spontaneous. \nPeople-oriented -- enjoys interacting with people and working on group projects. \nAdaptable/flexible -- enjoys doing work that requires frequent shifts in direction. \nDetail-oriented -- would rather focus on the details of work than the bigger picture. \nAchievement-oriented -- enjoys taking on challenges, even if they might fail. \nAutonomous/Independent -- enjoys working with little direction. \nInnovative -- prefers working in unconventional ways or on tasks that require creativity. \nHigh stress tolerance -- thrives in a high-pressure environment. \nJob Type\nFull-time\n\nWork location\nRemote opportunities are available to candidates who reside in the following states: AL, AZ, CT, FL, GA, HI, IA, IL, IN, KY, LA, MD, MA, MI, MN, MO, MT, NC, NE, NH, NJ, NV, OH, OK, OR, PA, RI, TN, TX, VA, WA, WI, WY\n\nBenefits\nHealth insurance \nDental insurance \nVision insurance \nFlex Paid time off \nParental leave \nProfessional development assistance \n401K \nOur commitment to an inclusive workplace\nRethinkFirst is an equal opportunity employer and is committed to providing a workplace free from harassment and discrimination. We celebrate the unique differences of our employees because that is what drives curiosity, innovation, and the success of our business. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws. Accommodations are available for applicants with disabilities.\nJazzHR Privacy Policy\nJazzHR Terms of Use\nCalifornia Privacy Notice\nRecruiting Fraud Alert: Job applicants should be aware that external parties may pose as RethinkFirst recruiters. These scams may include fraudulent communications through social media platforms such as LinkedIn, email, or requests to schedule interviews. Any recruiting-related communication from RethinkFirst will come from an @rethinkfirst.com email address, [email protected], an @applytojob.com email address through our talent acquisition system, or rethinkfirstcareers.com for approved recruiting outreach campaigns. Official job postings may also be found on the RethinkFirst.com website. Please note that at no point during our recruitment process will we request any form of monetary payment. 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