Senior AI Fullstack Software Engineer

Lumenalta; United States; Remote; USD 96,000 - 120,000; Full time

Benefits offered by this job

Health insurance (medical and dental)

401K Contribution

15 days PTO annually

Professional development fund

Job summary

Lumenalta is seeking a Senior AI Fullstack Software Engineer to own front-to-back development with JavaScript, TypeScript, and Python. You will build secure, scalable APIs and contribute to AI harnesses and prompt engineering from a fully remote setting in the U.S. market.

You will collaborate with enterprise clients, design modular architectures, and ship AI-powered solutions across the stack. Strong communication and leadership in a remote team are essential.

Qualifications

• 7+ years in JavaScript/TypeScript/Node.js ecosystem.
• Strong Python expertise and async services.
• Experience building with AI tools, prompt debugging, and AI harnesses.

Responsibilities

• Collaborate with visionary enterprise clients.
• Write clean, secure, and testable TypeScript code across the stack.
• Design, build, and maintain RESTful, GraphQL, and WebSocket APIs.
• Extend AI workflows and harnesses; manage infrastructure, prompt engineering, debugging, and evaluations.

Skills

JavaScript

TypeScript

Node.js

Express

MongoDB

SQL

AWS

Python

AI harnesses

Tools

Express

MongoDB

SQL

Job description

# Senior AI Fullstack Software EngineerAI EngineerAt 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 growthIf you’re a passionate, career-focused developer ready to make a lasting impact, we want to hear from you!#### LocationThis 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 DeadlineApplications will be accepted until **September 20th, 2026**. Candidates can expect feedback by **September 28th, 2026**.## Salary**Salary range:** $96k - $120k annually, with final compensation determined by your qualifications, expertise, experience, and the role's scope.## BenefitsIn 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 W2 Employees.* 401K Contribution.* 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 DetailsThis is a full-time position requiring a minimum of **40 hours per week, Monday through Friday**.At **Lumenalta**, we are committed to creating an environment that prioritizes growth, work-life balance, and the diverse needs of our team members.