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Agileengine

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Senior Backend Engineer

Cluj-Napoca, RomaniaFull-timeSeniorPosted Nov 6, 2026

Job description

AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. WHY JOIN US If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you!

ABOUT THE ROLE

We are looking for a Senior Backend Engineer to build and scale the backend of a high-traffic gaming companion site. The mandatory requirements are 5+ years of backend development with TypeScript on Node.js, PostgreSQL or MySQL, Redis caching, REST and GraphQL APIs, daily use of AI coding tools, and an upper-intermediate English level.

WHAT YOU WILL DO

  • Build and maintain REST and GraphQL APIs in TypeScript (Fastify, Hono) for user profiles, subscriptions and game data, including authentication, rate limits and typed contracts.
  • Design schemas and write queries for PostgreSQL and MySQL (Prisma, Drizzle), including versioned game data, player builds and migrations on tables in live use.
  • Run ClickHouse analytics pipelines: request logs, materialized views, article and revenue metrics, and the queries behind dashboards.
  • Own the cache layers end to end: Redis-compatible stores, query caching, tag-invalidated cache, HTTP headers and CDN purges.
  • Build and run scheduled jobs and queue consumers (NATS) for game data sync, leaderboards, Meilisearch indexing, sitemaps, Stripe webhooks, payouts and data-deletion requests.
  • Integrate third-party APIs (Stripe, Discord, Blizzard, IGDB, Steam, YouTube), handling retries, backoff and rate limits.
  • Process game images into map tiles, sprite sheets and responsive image sizes.
  • Keep responses lean for Remix and Next.js pages to improve time to first byte, PageSpeed and SEO.
  • Work with AI coding agents every day: direct them, review their output, and maintain the guardrails that make their changes safe to merge (tests, lint rules, build checks, agent instructions).
  • Deploy through Docker, GitHub Actions and Kubernetes.
  • Support high-traffic game launches, including outside regular hours when needed. MUST HAVES - 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, query plans, migrations on live data, transactions and locking.
  • Experience running an analytical database at production volume ( ClickHouse preferred; BigQuery, Druid or similar also count ).
  • Experience designing caching: Redis or a compatible store, invalidation strategies, 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) : daily, hands-on use in a real codebase, and good judgment about when their output needs checking.
  • Comfortable reading and changing React code when a feature reaches the frontend.
  • Able to work well in a startup-style, fast-paced environment with changing priorities.
  • Flexible about working hours: some game launches happen in the evening or on weekends and need coverage outside the standard 9-to-5.
  • Passion for gaming.
  • Upper-intermediate English level. NICE TO HAVES
  • Experience with Bun.
  • Experience with any of the current stack: Remix, Next.js, Fastify, Hono, Prisma, Drizzle, Apollo GraphQL, Meilisearch, NATS, Ory, Stripe, Nx. - shadcn/ui and Tailwind CSS.
  • Strict lint setups (typescript-eslint strictTypeChecked, custom lint rules, architecture boundaries).
  • Docker, Kubernetes, GitOps (ArgoCD), GitHub Actions, External Secrets.
  • Payments and subscriptions (Stripe checkout, webhooks, promotion codes).
  • Writing agent instructions, skills or custom tooling for AI coding agents.
  • Experience building game tools, such as databases, interactive maps, calculators or planners.

PERKS AND BENEFITS

  • Professional growth : Mentorship, TechTalks, and personalized growth roadmaps.
  • Competitive compensation : USD-based pay with education, fitness, and team activity budgets.
  • Exciting projects : Modern solutions with Fortune 500 and top product companies.
  • Flextime : Flexible schedule with remote and office options. Meet Our Recruitment Process Application → Coding Challenge → Video Interview → Technical Interview or Hiring Manager Interview Each step helps us understand your skills and overall fit. If it’s a match, you’ll receive an offer.

Description copied from Agileengine's careers page. Read the full posting before you apply.

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