Role description

Back End Developer

Gameplay Galaxy

AI-native

TypeFull-time

SenioritySenior

LocationSan Francisco, CA

Posted5/6/2026

Engineering

Senior Backend Engineer

Mobile Gaming + AI Platform |
Remote

About the role

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

Required

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/http 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

Apply on LinkedIn

Company info

Gameplay Galaxy

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. We’re a fully remote and diverse team of around 55 talented individuals based in more than 20 different countries, bringing together unique perspectives that drive our innovation. Why you’ll love working with us: * Enjoy the flexibility of working remotely from anywhere! * We offer a competitive salary along with equity options, ensuring you’re rewarded for your hard work. * Join a great environment where you can collaborate with exceptional people who value open communication, creativity, and the unique contributions of every team member. * Enjoy unlimited holidays and sick days—w

Seed

HQSan Francisco, US

Size71 employees