Senior AI Fullstack 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 clientsFull-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 APIsExtend 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 productsTackle complex challenges at scalePush 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 teamEnjoy a flexible, remote-first environmentJoin a company that values your growthIf you’re a passionate, career-focused developer ready to make a lasting impact, we want to hear from you! Salary Salary range: CA$80,000 - CA$165,000 annually, with final compensation determined by your qualifications, expertise, experience, and the role's scope. 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. Benefits In addition to competitive pay, we offer a variety of benefits to support your professional and personal growth, including: Flexible working hours in a remote environment.Health insurance (medical and dental) for T4 Employees.A professional development fund to enhance your skills and knowledge.15 days of paid time off annually.Access to soft-skill development courses to further your career. Position Details This is a full-time position requiring a minimum of 40 hours per week, Monday through Friday. Application Deadline Applications will be accepted until October 11, 2026. Candidates can expect feedback by October 19, 2026.