About RethinkFirst
Rethink is on a mission to inspire hope and power potential. Founded in 2008 and headquartered in NYC, Rethink First is a pioneer and market leader in behavioral and mental health technology.
Developed by nationally recognized experts in the field, Rethink’s award-winning online solutions feature comprehensive video-based training and education programs and sophisticated behavior intervention planning tools. Our offerings include individualized assessments, online skills-based activities, access to remote clinician-led consultations, and more.
The Rethink 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.
Position Overview
We are seeking a Senior Full Stack Engineer to join our Architecture Team. This role is ideal for an experienced engineer who thrives at the intersection of hands-on coding and strategic architecture. You will help shape technical direction, champion best practices, mentor other developers, and ensure our systems are scalable, secure, and reliable.
This position requires deep expertise in Microsoft technologies (C#, .NET, SQL, Azure), strong knowledge of modern software design, and the ability to translate business needs into effective technical solutions.
Responsibilities
- Contribute to architectural design, ensuring alignment with scalability, performance, security, and compliance standards.
- Develop, design, test, and deploy cloud-based applications using C#, .NET Core, SQL, Azure, and Angular.
- Establish and enforce coding standards, design patterns (SOLID, DDD, CQRS, etc.), and development methodologies (Agile, CI/CD, DevOps).
- Write, review, and maintain high-quality code with strong emphasis on unit testing (XUnit/NUnit), integration testing, and automated pipelines.
- Mentor and coach engineers across teams, promoting continuous learning and knowledge sharing.
- Collaborate with cross-functional stakeholders to translate requirements into technical designs and solutions.
- Drive adoption of best practices in DevOps, microservices, containerization (Docker), messaging (Service Bus), caching (Redis), and observability (App Insights, logging, monitoring).
- Participate in architectural reviews, code reviews, and design discussions.
- Contribute to long-term platform strategy, modernization, and cloud migration initiatives.
- Troubleshoot production issues and guide root cause analysis to ensure system reliability.
Qualifications
Education/Experience
• Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience).
• 8+ years of professional software development experience, with at least 3+ years in a senior or lead role.
• Proven experience designing and implementing enterprise-scale applications on the Microsoft stack (C#, .NET Core/Framework, SQL Server, Azure).
Technical Skills
• Strong expertise in object-oriented design, design patterns, SOLID principles, and domain-driven design.
• Experience with Angular, TypeScript, HTML, CSS, JavaScript.
• Strong SQL skills including query optimization, schema design, and stored procedures.
• Cloud-native development in Microsoft Azure: App Services, Functions, Service Bus, Storage, Key Vault, Azure SQL, and monitoring tools.
• Familiarity with microservices architecture, RESTful APIs, and event-driven systems.
• Hands-on experience with CI/CD pipelines, Azure DevOps, Git, Docker, and Infrastructure as Code (Terraform/ARM).
• Experience implementing unit testing frameworks (XUnit, NUnit, Moq), automated testing, and test-driven development (TDD/BDD).
• Knowledge of healthcare domain standards (HIPAA, HITRUST, SOC2) is a strong plus.
Soft Skills
• Demonstrated ability to mentor and grow engineering talent, fostering collaboration and knowledge sharing.
• Excellent problem-solving, communication, and leadership skills.
• Strong adaptability in a fast-paced, evolving environment.
• A passion for innovation, continuous learning, and delivering high-quality products.
Preferred Additional Experience
Candidates with experience designing, developing, or integrating AI-driven systems will have an advantage. This includes experience with:
• Building or integrating AI agentic systems for automation, decision-making, or intelligent workflows.
• Leveraging large language models (LLMs), vector databases, or machine learning frameworks.
• Designing scalable APIs, MCPs and microservices that support AI/ML workloads.
• Applying ethical AI practices, data governance, and secure handling of sensitive information.
• Collaborating with data scientists and product teams to translate AI research into production-ready solutions.
This Job Is Ideal for Someone Who Is
- Dependable and accountable with strong ownership.
- People-oriented and effective in mentoring and collaborating across teams.
- Adaptable and able to pivot in a dynamic environment.
- Detail-oriented with a strong focus on quality.
- Achievement-driven and willing to tackle challenging problems.
- Innovative and able to think strategically about technology and business alignment.
Benefits:
- Generous health, dental, & vision benefits package
- Flexible paid time off
- 11 paid company holidays
- 401k + matching
- Parental leave
- Access to our award-winning RethinkCare platform supporting neurodiversity in the workplace through parental success, professional resilience, and personal wellbeing
Job Type
Full-time (W2 only), Remote
Location: Remote 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, OR, PA, RI, TN, TX, VA, WA, WI, WY
Our commitment to an inclusive workplace
RethinkFirst 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.
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Recruiting 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. If you believe you have been a victim of job recruiting fraud, you should file a report with your local law enforcement.
Skills Required
- Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience)
- 8+ years professional software development experience
- 3+ years in a senior or lead engineering role
- Proven experience designing and implementing enterprise-scale applications on Microsoft stack (C#, .NET Core/Framework, SQL Server, Azure)
- Strong expertise in object-oriented design, design patterns, SOLID principles, domain-driven design, CQRS
- Experience with Angular, TypeScript, HTML, CSS, JavaScript
- Strong SQL skills: query optimization, schema design, stored procedures
- Cloud-native development in Azure: App Services, Functions, Service Bus, Storage, Key Vault, Azure SQL, Application Insights
- Familiarity with microservices architecture, RESTful APIs, and event-driven systems
- Hands-on experience with CI/CD pipelines, Azure DevOps, Git, Docker, and Infrastructure as Code (Terraform/ARM)
- Experience implementing unit testing frameworks and TDD/BDD (XUnit, NUnit, Moq)
- Experience mentoring and coaching engineers and leading technical discussions
- Knowledge of healthcare domain standards (HIPAA, HITRUST, SOC2)
- Experience designing or integrating AI-driven systems (LLMs, vector DBs, ML frameworks)
What the Team is Saying
RethinkFirst Compensation & Benefits Highlights
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Healthcare Strength — Health coverage is considered comprehensive, spanning medical, dental, vision, and mental‑health resources. Affordability is sometimes highlighted, including an individual plan option cited as costing little to nothing.
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Leave & Time Off Breadth — PTO and paid holidays are presented as generous, with flexible or “unlimited” PTO often usable in practice. This breadth of time off supports work‑life balance for many roles.
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Wellbeing & Lifestyle Benefits — Access to RethinkCare and an EAP provides distinctive mental‑health and caregiver support, extending to several friends or family members. This emphasis on wellbeing stands out versus typical offerings.
RethinkFirst Insights
What We Do
Rethink aims to provide families, educators and behavior healthcare providers affordable, best practice treatment solutions for children with special needs. Rethink is unique in our foot-print offering clinical support, best-practice tools, and research-based content via technology to all market segments, reaching more children with special needs than any other solution. Our platform supports curriculum planning, professional development, parent training, and tracking of student progress. Through video and online tools, we bring to life best practice teaching, treatment, and intervention strategies that help educators, parents, and clinicians personalize instruction for every child. The Rethink program is currently being used by employers, the US Department of Defense, Managed Care, Medicaid, federal, state and social service agencies, public school districts, and families nation- and worldwide.
Why Work With Us
Together, we’re a team of passionate, talented and motivated people working every day to help others live healthier, happier and more productive lives. Individually, we’re an incredibly diverse group of people who respect each other, celebrate our differences and unique talents and enjoy meeting new friends and colleagues along the way.
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RethinkFirst Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
RethinkFirst offers employees the opportunity to work remotely from the comfort of their home with occasional visits to the office in our beautiful Chelsea-based NYC office. Some roles have specific requirements around travel and in-office needs.
