Senior Backend Engineer (remote)

What are you working on?

• The name of the project(s): Trial Xtreme Freedom, Duels
• Genres: Racing, Role-playing, Sports
• Platforms: iOS, Android

Gameplay Galaxy is the team behind Trial Xtreme, one of the world’s leading bike racing mobile games with over 300 million downloads!

Building on that incredible success, and supported by $24 million in funding, we’re excited to work on our new game, Trial Xtreme Freedom. With this project, we aim to transform the gaming landscape through innovative blockchain technology and engaging, immersive gameplay.

For which tasks (responsibilities)?

You'll own the backend for a live mobile F2P game and the AI agentic platform that powers how we operate it. Feature releases, live ops, monetization, analytics pipeline, reliability. Senior IC with real ownership from day one and a path to platform / tech lead as we scale. You work with our production systems serving real players and real revenue. The primary stack is TypeScript/Node.js (Fastify) with MongoDB, ClickHouse, Redis, and RabbitMQ. The AI tooling layer is Go. We use AI heavily as part of how we work. Claude agents write production code alongside us. If you're a strong backend engineer who's comfortable with that mode, you'll fit right in.

What you'll work on

• Game backend: API server, realtime (Socket.io), analytics ingestion, cron jobs — all in one TypeScript monorepo

• AI agent platform: MCP server in Go bridging LLMs with our databases and third-party APIs

• External integrations: Slack, Discord, GitLab, Meta Ads, Google Ads, AppLovin, Apple App Store

• LLM routing: Anthropic, OpenAI, DashScope

• Production support for our live PvP mobile game

What kind of professional are we looking for?

• 5+ years backend engineering

• TypeScript/Node.js at production scale. you've shipped & operated production services at scale

• MongoDB in production: replica sets, aggregation pipelines, transaction patterns

• ClickHouse: analytical queries, materialized views, joins at scale

• Kubernetes in production (we run k3s on GCP, deploy via Helmfile + GitLab CI)

Strongly preferred

• Go: comfortable reading and extending stdlib net/ services. Our MCP server is Go

• LLM API integrations (Anthropic, OpenAI)

• Mobile gaming backend: live ops, A/B test infrastructure, IAP validation

• RabbitMQ or similar async messaging

• OAuth/JWT/RBAC

Nice to have

• MCP (Model Context Protocol) — we use mark3labs/mcp-go

• F2P economy design / monetization backend experience

• Apple/Google Play Store API

• Agent systems or autonomous workflow background

Why do we enjoy working here?

• You’ll be able to make an impact, to work closely with the rest of the team and its leads to work on one of the most promising upcoming games in the mobile gaming industry and the Web3 space.

• You’ll have a comfortable work schedule and stable workload. With a variety of tasks that will allow your constant professional development.

• We want our team to grow personally and professionally and support learning opportunities, especially with a focus around new AI tools and methods.

• We have a culture that puts our people first. We believe in open communication, creativity and the value of unique contributions from everyone in the team.

The selection process

HR interview

Hiring Manager interview

Final interview