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Senior Backend Engineer

Remote, Poland, Portugal, Ukraine, Bulgaria, Romania, Spain, Slovakia, Slovenia·Full-time·Added yesterday (last checked 6 Nov)

AgileEngine

20 open roles

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Our summary

Hours
Includes weekends
Work mode
Remote (Poland, Portugal, Ukraine, Bulgaria, Romania, Spain, Slovakia, Slovenia)
Contract
Full-time
English
Required
Experience
5+ years

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Skills

Nice to have

Requirements

What we're looking for

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.

  • 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 have

  • 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.

Pay & benefits

What you'll get

  • Growth without limits: build your skills through mentorship, internal TechTalks, challenging projects, and a dedicated annual learning budget
  • Competitive compensation: get recognition that reflects your skills and impact, with regular performance and compensation reviews
  • Flexibility: work 100% remotely with flexible hours that support focus, autonomy, and a healthy work rhythm
  • Meaningful, modern projects: build impactful products using modern technologies alongside global teams and leading brands
  • Collaborative culture: join a supportive environment with zero micromanagement where ideas are welcomed and contributions are recognized
  • Well-being & support: access local well-being programs and people-focused support tailored to your location

The role

We are looking for a Senior Backend Engineer to build and scale the backend of a high-traffic gaming companion site.

What you'll 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.

About AgileEngine

AgileEngine is a custom software engineering company that builds digital products for clients across industries such as fintech, healthcare, retail, and media. With a global team of over 1,000 engineers and a presence in the Americas, Europe, and Asia, the company is known for its agile delivery model and expertise in AI, cloud, and enterprise integrations. It operates as a technology partner for both startups and large enterprises, offering end-to-end product development, from strategy to maintenance.

In Spain, AgileEngine has a growing team of engineers and specialists, with roles spanning AI, data, security, and platform engineering. The company promotes a remote-first culture, allowing professionals to work from anywhere in Spain while collaborating with international teams. For international hires, AgileEngine offers competitive compensation, professional development opportunities, and a diverse, English-speaking work environment, making it an attractive option for tech talent looking to relocate to Spain.

Industry
Software Engineering
Founded
2009
Employees
1,000–5,000
Headquarters
Washington, D.C., USA

Good to know if you are moving

  • AgileEngine offers fully remote positions in Spain, allowing flexibility in location within the country.
  • The company has a global team, with English as the primary working language, making it accessible for international professionals.
  • AgileEngine provides professional development opportunities, including certifications and learning budgets.
  • The company has a strong focus on work-life balance, with flexible working hours and a supportive culture.
  • Spain-based employees are part of a global network, with opportunities to collaborate with teams across the Americas and Europe.
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