Lead Full Stack Developer

BoostHire LLC; France; À distance; EUR 90 000 - 130 000; Plein temps

Résumé du poste

BoostHire LLC is seeking an experienced architect/developer to design and implement core game features in Unity (C#) and backend systems in Node.js. You will build robust APIs and scalable infrastructure for multiplayer features, leaderboards, and user accounts, while mentoring a cross-functional team of Unity and backend engineers.

Collaborate with game designers and product leads to ship live ops features, analytics, and player personalization.

Qualifications

• 5+ years of professional experience with Unity (C#) and Node.js.
• Shipped at least 2 games with live backend services, ideally at scale.
• Strong knowledge of game client-server architecture, multiplayer synchronization, and network optimization.
• Experience with database design and management (MongoDB, Redis, PostgreSQL, etc.).
• Deep understanding of authentication, data security, and performance tuning.
• Solid DevOps fundamentals — Docker, CI/CD, monitoring tools, cloud scaling.
• A proven track record of technical leadership, mentoring, and cross-team collaboration.

Responsabilités

• Architect and develop core game features in Unity (C#) and backend systems in Node.js.
• Design APIs and client-server protocols that are robust, efficient, and secure.
• Build scalable, fault-tolerant infrastructure for multiplayer features, leaderboards, user accounts, and more.
• Lead and mentor a cross-functional team of Unity and backend developers.
• Collaborate with game designers, artists, and product leads to bring new features to life.
• Implement tools and pipelines for live ops, analytics, A/B testing, and player personalization.
• Ensure code quality, reliability, and performance across frontend and backend.
• Oversee CI/CD pipelines, server deployments, and cloud architecture (AWS, GCP, Firebase).

Connaissances

Unity (C#)

Node.js

Leadership

CI/CD

Security

Performance tuning

DevOps basics

Outils

MongoDB

Redis

PostgreSQL

Docker

AWS

GCP

Firebase

PlayFab

WebSockets

REST

GraphQL

TypeScript

Next.js

React

Description du poste

You’ll be at the intersection of gameplay and backend services — designing seamless systems that scale with millions of players. From matchmaking logic and real-time gameplay to cloud saves and event-driven backends, you’ll help define the tech direction and lead the engineering execution across the stack.

What You’ll Do

Architect and develop core game features in Unity (C#) and backend systems in Node.js

Design APIs and client-server protocols that are robust, efficient, and secure

Build scalable, fault-tolerant infrastructure for multiplayer features, leaderboards, user accounts, and more

Lead and mentor a cross-functional team of Unity and backend developers

Collaborate closely with game designers, artists, and product leads to bring new features to life

Implement tools and pipelines for live ops, analytics, A/B testing, and player personalization

Ensure code quality, reliability, and performance across both frontend and backend

Oversee CI/CD pipelines, server deployments, and cloud architecture (e.g., AWS, GCP, Firebase)

Requirements

What We’re Looking For

5+ years of professional experience with Unity (C#) and Node.js

Shipped at least 2 games with live backend services, ideally at scale

Strong knowledge of game client-server architecture, multiplayer synchronization, and network optimization

Experience with database design and management (MongoDB, Redis, PostgreSQL, etc.)

Deep understanding of authentication, data security, and performance tuning

Solid DevOps fundamentals — Docker, CI/CD, monitoring tools, cloud scaling

A proven track record of technical leadership, mentoring, and cross-team collaboration

Nice to Have

Experience with Firebase, PlayFab, or other BaaS tools

Familiarity with WebSockets, REST, and GraphQL APIs

Previous work on real-time multiplayer or PvP game systems

Knowledge of TypeScript, Next.js, or React for admin tools or dashboards

Why Join Us

Build high-impact features used by millions of players

Work on a tight-knit team with high ownership and autonomy

Competitive compensation, equity options, and performance-based bonuses

Remote flexibility, generous vacation, and strong personal development support

Be part of a studio where tech is valued just as much as creativity