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, TypeScript and Python 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.

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.
• 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.
• Strong Python expertise, including asynchronous services, type-safe application development, API design, testing, and scalable backend systems
• 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 October 4th, 2026. Candidates can expect feedback by October 12th, 2026.