Senior AI Fullstack Software Engineer

At Lumenalta, we create impactful software solutions that drive innovation and transform businesses. Since 2000, we’ve partnered with visionary leaders to build cutting-edge tech, solve complex challenges, and deliver results faster through our elite teams and tech-driven approach. Join us in shaping the future of technology. We are seeking a Senior AI Fullstack Engineer proficient in JavaScript and TypeScript who thrives on solving AI challenges across the entire stack. This role is ideal for a developer who excels in both frontend and backend development and enjoys building with AI-assisted tools. You will combine strong software engineering fundamentals with deep experience in AI harness design, prompt engineering, evaluation rubrics, and HIPAA-compliant data architecture. #### What You’ll Be Doing * Collaborate with visionary enterprise clients * Full-stack Expertise: Write clean, secure, and testable TypeScript code across the software ecosystem.

* Architecture & Design

Develop modular patterns, scalable system architectures, and efficient server- and client-side logic.

* API Integration

Design, build, and maintain robust RESTful, GraphQL, and WebSocket APIs * Extend and implement AI workflows and harnesses using TypeScript and following AI and software engineering best practices; you'll be in charge of Harness Infrastructure, Prompt Engineering, Debugging, and Evaluations.

* Healthcare and compliance

design privacy-first AI pipelines and prompt/responses filters that adhere to HIPAA guidelines, securing Protected Health Information (PHI). * Create transformative digital products * Tackle complex challenges at scale * Push boundaries with emerging technologies #### What we are looking for * 7+ years of expertise in JavaScript, TypeScript, Node, Express, Mongo, SQL, AWS. * Solid understanding of HIPAA compliance requirements, zero-retention API configs, data anonymization, and encrypted data handling. * Recent demonstrable hands-on experience building with AI tools, prompt debugging tools, custom AI harnesses, and agentic coding workflows. * Proficient in written and verbal communication in English. * Demonstrable experience working in a remote environment, with a proactive and team-oriented approach. #### Why Lumenalta? * Work on meaningful, impactful projects. * Collaborate with a talented, supportive team * Enjoy a flexible, remote-first environment * Join a company that values your growth If you’re a passionate, career-focused developer ready to make a lasting impact, we want to hear from you! #### Location This is a fully remote position; however, candidates must be based in regions that align with the Pacific, Central, or Eastern U.S. time zones to ensure effective collaboration with client and team schedules. #### Application Deadline Applications will be accepted until **September 20th, 2026**. Candidates can expect feedback by **September 28th, 2026**.