Senior Backend Engineer | TS, APIs, AI Tools, Remote

AgileEngine, LLC.; Madrid; On-site; EUR 108,000 - 161,000; Full time

Benefits offered by this job

Professional growth

Competitive compensation (USD-based)

Exciting projects

Flextime

Job summary

AgileEngine is seeking a Senior Backend Engineer to build and scale the backend of a high-traffic gaming companion site. You will work with TypeScript on Node.js, design SQL schemas, caching strategies, and analytics pipelines while integrating Stripe, Discord, Blizzard, IGDB, Steam and YouTube APIs.

The role requires 5+ years of backend development, strong TS type skills, and experience with GraphQL/REST APIs.

Qualifications

• 5+ years of backend development with TypeScript on Node.js.
• Strong command of TypeScript’s type system (generics, inference, discriminated unions, narrowing).
• Schema validation experience with Zod or similar.
• Strong SQL skills in PostgreSQL and/or MySQL: schema design, indexing, migrations on live data.
• Experience running an analytical database at production volume (ClickHouse preferred).
• Experience designing caching: Redis or a compatible store, HTTP cache headers, CDN behavior.
• Experience designing and consuming REST and GraphQL APIs, including authentication and rate limiting.
• Experience with background jobs and message queues, including handling jobs that run twice or don’t run at all.
• Experience with high-volume, user-facing production applications.
• Experience taking a product from idea to production.
• Proficiency with agentic AI coding tools (Claude Code, Cursor or similar).
• Comfortable reading and changing React code when a frontend feature is involved.
• Able to work in a startup-style, fast-paced environment with changing priorities.
• Flexible about working hours for game launches.
• Passion for gaming.

Responsibilities

• Build and maintain REST and GraphQL APIs in TypeScript (Fastify, Hono) for user profiles, subscriptions and game data.
• Design schemas and write queries for PostgreSQL and MySQL (Prisma, Drizzle) with versioned game data and migrations.
• Run ClickHouse analytics pipelines: request logs, materialized views, revenue metrics, and dashboards queries.
• Own the cache layers end to end: Redis stores, cache invalidation, HTTP headers, CDN purges.
• Build and run scheduled jobs and queue consumers (NATS) for data sync, leaderboards and indexing.
• Integrate third-party APIs (Stripe, Discord, Blizzard, IGDB, Steam, YouTube) with retry/backoff.
• Process game images into tiles and sprite sheets; optimize for Remix/Next.js time to first byte.
• Collaborate with AI coding agents safely: reviews, tests, lint rules and build checks.

Skills

TypeScript

Node.js

PostgreSQL

MySQL

Redis

REST API

GraphQL

AI tooling

English (upper-intermediate)

Tools

Prisma

Drizzle

Fastify

Hono

GitHub Actions

Docker

Kubernetes

Meilisearch

NATS

Stripe

Job description

AgileEngine is seeking a Senior Backend Engineer to build and scale the backend of a high-traffic gaming companion site. You will work with TypeScript on Node.js, design SQL schemas, caching strategies, and analytics pipelines while integrating Stripe, Discord, Blizzard, IGDB, Steam and YouTube APIs.

The role requires 5+ years of backend development, strong TS type skills, and experience with GraphQL/REST APIs.