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Open nowPosted 27 days ago

Senior Software Engineer — Node.js / Serverless Cloud & API Integrations

HR-ON

Where
Denmark
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Your applicationOpen nowSenior Software Engineer — Node.js / Serverless Cloud & API IntegrationsHR-ON · Denmark

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The clock on this job

Early applications get read.

11.3% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.0%1 day
  2. 4.3%3 days
  3. 11.3%7 days
  4. 17.5%14 days
  5. 34.2%30 days
  6. 43.5%60 days
This job: posted 27 days ago

The posting

Vi søger ildsjæle

Senior Software Engineer — Node.js / Serverless Cloud & API Integrations

Do you want to help shape a modern, scalable HR platform used by organisations worldwide?

At HR-ON we’re looking for a Senior Backend Software Engineer who enjoys building cloud-native services, optimising data workflows, and—yes—crafting solid API integrations … but treats these as just one part of a varied engineering role.

What You’ll Do

  • Design and build core backend services in Node.js & TypeScript running on AWS serverless infrastructure (Lambda, API Gateway, SQS, etc.).
  • Model and optimise data in PostgreSQL and MariaDB, ensuring performance and reliability at scale.
  • Develop and maintain GraphQL & REST endpoints that power our own product features and partner integrations.
  • Evolve the platform architecture for resilience, observability, and easy maintenance.
  • Automate CI/CD pipelines with GitLab and champion clean-code practices through code reviews and pair-programming.
  • Collaborate with product, frontend, and DevOps peers to deliver end-to-end features that delight our users.

API and third-party integrations remain important, but they sit alongside core service development, data engineering, and architectural work.

About You

You’re an experienced engineer who:

  • Writes production-grade Node.js/TypeScript and understands modern serverless patterns.
  • Knows your way around SQL—from schema design to complex query optimisation.
  • Has built GraphQL or REST services and integrated external systems, even if integrations aren’t your sole focus.
  • Uses GitLab (or similar) for version control, CI, and automated tests.
  • Thinks in terms of scalable, maintainable architecture and values knowledge-sharing with teammates.

Bonus Points

  • AWS infrastructure-as-code (CDK, Terraform, CloudFormation).
  • Bash/Zsh scripting on *nix systems.
  • A fondness for type-safe, declarative coding styles (e.g. fp-inspired TypeScript).

We don’t expect you to tick every box—curiosity and a growth mindset matter most.

Why HR-ON

  • High autonomy & influence over tech choices and ways of working.
  • Value-based self-management—trust, transparency, and flexibility come first.
  • Central Odense office with remote options; we still value regular in-person collaboration.
  • 50 passionate colleagues across Denmark, Germany, Norway, and Japan, united by a flat structure and meaningful work.

How to Apply

We assess applications continuously - apply online today, ideally with code samples or project links.

Questions?

We look forward to hearing from you!

Work location : Odense C

Application deadline : As soon as possible

Posting text belongs to the employer. Removal requests: contact us.

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