Senior Full-Stack Engineer (Next.js)

Scalable Path is looking for a Senior Full-Stack Engineer (Next.js) to join the team and work on a client project. This is a remote, full-time (35 hours/week) position.

Client company description:

The client is a tech startup building immersive real-time learning platforms using WebRTC, AI avatars, and multiplayer engagement to transform education and training.

Overview

The client seeks a Senior Full-Stack Engineer specializing in Next.js, React, and TypeScript to build scalable, responsive applications for immersive learning platforms. The role involves hands-on development, architectural leadership, and mentoring within a small agile engineering team.

Duties and responsibilities:

• Build features end-to-end in Next.js including UI in React Server and Client Components, server logic in server actions or API routes, and data via Prisma + MongoDB
• Work day-to-day in a Bun + Turbo monorepo, contributing across apps and shared packages
• Design and write shared code in the packages layer consumed by multiple apps
• Architect and integrate data flows to keep thousands of concurrent learners in sync
• Build developer-friendly APIs for real-time feature integration
• Optimize performance, bundle size, and runtime stability
• Build responsive, user-friendly interfaces collaborating with UI/UX designers
• Ensure code quality through code reviews, unit testing, debugging, performance monitoring, and documentation
• Mentor junior to mid-level engineers through code reviews, pairing, and technical feedback
• Lead architectural decisions and drive technical conversations with clarity and respect
• Collaborate daily with product and UX teams in an Agile environment

Qualifications

• 10+ years of full-stack development experience
• Strong JavaScript & TypeScript across front and back
• Deep React knowledge including modern hooks, Server Components, Client Components, server actions, and state management
• Production experience with Next.js including App Router and modern data-fetching model
• Strong monorepo experience with Turbo, Nx, or similar
• Solid foundation in software engineering including data modeling, API design, authentication, session management, and architectural tradeoffs
• Experience with a database, ideally through an ORM (MongoDB via Prisma)
• Demonstrated track record of mentoring junior to mid-level engineers through code reviews, pairing, and direct technical feedback
• Experience with Git, testing, debugging, and Agile teamwork
• Strong decision-making and communication skills
• Bonus: Experience with Next.js 16, DevOps tools (GitLab CI, Docker, Kubernetes), real-time media (LiveKit, WebRTC), game engines (Unity, Agones, WebGL), cloud certifications (GCP, AWS)

Relationships - who you'll be working with:

The engineer will join a small team of 7 engineers and collaborate closely with product and UX teams in an Agile environment. They will mentor junior to mid-level engineers and lead technical discussions.

Start date:

As soon as possible.

Expected contract duration

: 6-12 months

If all goes well, it's likely this engagement will last longer.

Preferred regions:

The client's preference is for candidates to be located in Canada, Latin America or Europe.

Notes:

The client is open to candidates based in Europe as long as they are open to working 9 am - 4:30 pm EST

Required skills

• English (Must have)
• Next.js (Must have)
• TypeScript (Must have)
• JavaScript (Must have)
• React (Must have)
• MongoDB (Must have)
• WebRTC (Nice to have)
• Unity (Nice to have)
• AWS (Nice to have)
• Docker (Nice to have)