Are you interested in working with the World’s leading AI-powered Quality Engineering Company? Ready to advance your career, team up with global thought leaders across industries and make a difference every day? Join us at Qualitest!

 

We are looking for a Full Stack Developer UX Design- XR & AI Innovation to join our growing team in Burlingame, CA (onsite).

 

The Role

We’re looking for a contract Full Stack “Ninja” Developer who can move fast across both web and native mobile platforms. You’ll build full-featured, AI-first user experiences using modern full-stack frameworks (e.g. Node.js + React/Next.js) and native mobile stacks (Swift for iOS, Kotlin for Android), all integrated with scalable AI backends and robust cloud infrastructure.

 

Key Responsibilities

Build and ship production-grade web apps using Node.js + React/Next.js Develop performant iOS apps with Swift/SwiftUI and Android apps with Kotlin/Jetpack Compose Integrate AI capabilities: LLM APIs, tool use, vector DBs, memory, retrieval-augmented generation (RAG), and evaluation loops Design secure, scalable backend services in JavaScript/TypeScript or Python to orchestrate agentic workflows Deploy on AWS or GCP, using Docker, CI/CD, observability tooling, and IaC (Terraform or CDK) Rapidly prototype, iterate, and polish features in tight collaboration with product, research, and design

 

Qualifications

Deep experience with Node.js, React, and modern frontend architecture Native app development expertise in Swift/SwiftUI (iOS) and Kotlin/Jetpack Compose (Android) Backend experience with Node.js, Python, FastAPI, Next.js, LangChain, or similar frameworks Familiarity with cloud platforms (AWS or GCP), containerization, IaC (Terraform/CDK), and continuous delivery pipelines Strong product instincts and a passion for building clean, performant cross-platform apps Demonstrated success shipping AI-first features or applications powered by LLMs or agent frameworks

 

Bonus Points

Experience using AI development tools like Claude Code, Cline, or Copilot++ in production Familiarity with AI/ML infrastructure and workflows, including: Model training and fine-tuning pipelines using PyTorch or JAX On-device inference with Core ML, NNAPI, or quantized model deployment High-performance systems experience with C/C++, Rust, or Go for native modules, low-latency pipelines, or WebAssembly Familiarity with the latest developments in AI technologies

 

What We Offer:

A contract role building at the edge of what’s possible in AI-powered applications, across web and native platforms The chance to co-create next-generation products inside AI Tech, alongside top-tier engineers, designers, and researchers Access to cutting-edge models, tools, infrastructure, and internal research to ship bold, usable features fast

Benefits
Why QualiTest?

Be a part of a company who strives to support for diversity and inclusion in the workplace – we are one, we are many at Qualitest. Celebrate culture, share knowledge with engineers from around the globe, and inspire each other through our differences. We have more than 40% women and around 120 different nationalities. Local and global opportunities – we offer you internal rotation and international mobility opportunities to grow your career. Clear view of your career and progression with the company – Qualitest is growing massively (since 2021 – tripled our employees base – we now have more than 8,000 engineers) and giving you the opportunity to grow with us. Work hard and play harder with our flexible and casual culture. Take a break from work and join an employee event, or enjoy the amenities and games provided from one of our Employees Centers. Save your earnings and prepare for your future by enrolling in our 401k plan where Qualitest will match your contributions accelerating your savings plan. Take care of health with enrolment into one of our competitive healthcare benefits. Qualitest will match towards your HSA if you choose to participate. Never stop experimenting and learning with QCraft – our Learning & Development platform: 50,000+ courses, 300+ virtual labs, mentorship and leadership programs, professional tribes, sponsored certifications, and much more. Stay active and get rewarded with our Corporate Wellness Program. We pay your Gym membership and giving you opportunities to Earn additional vacation times for attendance the gym! Earn bonuses via our Client Referral and Employee Referral Program’s. Refer and earn – tap your network for net-worth. We recognize our employees work via our Qudos platform - You can earn bonuses and spot awards by celebrating your and your peers’ achievements. Planning a vacation? Looking for car insurance? Get access to Qualitest Employee Perks for discounts on anything from travel to electronics. With so many offerings the savings are endless! A Competitive pay, the salary range for the role is $130,000 - $140,000. Intrigued to find more about us? Visit our website at https://www.qualitestgroup.com/ If you like what you have read, send us your resume and let’s start talking!