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Backend Engineer (Node.js, Type Script)

Happening

Posted about 1 month ago

About this role

Full Time Senior Backend Engineer (Node.js, Type Script) in healthcare at Happening in Croatia. Apply directly through the link below.

At a glance

Work mode
Office
Employment
Full Time
Location
Croatia
Experience
Senior · 3+ years

Core stack

  • Observability
  • Event-Driven
  • TypeScript
  • Kubernetes
  • Compliance
  • Feedback
  • Security
  • Node.js
  • On-call
  • Logging
  • Tracing
  • Design
  • CI/CD
  • Kafka
  • SOLID
  • REST
  • K8s
  • API
  • SRE

Quick answers

  • What skills are required?

    Observability, Event-Driven, TypeScript, Kubernetes, Compliance, Feedback, Security, Node.js, On-call, Logging, and more.

Happening is hiring for this role. Visit career page

Croatia, Croatia

🚀 Why this role matters

Happening powers the technology behind Superbet’s platforms and brands, serving millions of customers. Our Game Integrations squad connects third-party providers to our core platform and ensures those experiences are reliable, scalable, and compliant.

We’re growing and scaling fast, and we need a Backend Engineer who can deliver high-quality integrations, shape engineering standards, and help accelerate how quickly new providers go live.

How we work: We’re product-minded squads with strong ownership, candid feedback, and measurable outcomes. We build, run, and continuously improve the tech that powers Superbet’s customer experience.

What you’ll do

  • Build integrations end-to-end - design contracts, implement services, write tests, and ship with confidence.

  • Own reliability - define SLIs/SLOs, set up observability (metrics, logs, traces), and join on-call.

  • Keep systems healthy - tackle production issues, reduce tech debt, and simplify through pragmatic refactors.

  • Work across boundaries - collaborate with Product, Compliance, SRE, Data, Security, and external partners to keep delivery smooth.

  • Level up the team - mentor more junior teammates through sharp code reviews, pairing, and knowledge sharing.

🛠️ Tech we use

  • Node.js + TypeScript (backend services & integrations)

  • Kubernetes (K8s) in production, CI/CD pipelines, containerized deployments

  • REST APIs with versioning & backward compatibility

  • Observability stack → metrics, tracing, logging, dashboards, and alerts

What we’re looking for

  • 3+ years building backend systems (ideally integrations) with Node.js + TypeScript

  • Event-driven systems (Kafkaand low-latency/high-throughput workloads
  • Solid production experience with Kubernetes and CI/CD pipelines

  • Strong background in API design (REST) and maintaining compatibility at scale

  • Focus on testing & quality (unit, integration, QA collaboration)

  • Ability to write clear docs and status updates that keep teammates aligned

Nice to have  

  • Experience with Nest.js
  • Gaming/fintech/e-commerce integrations (wallets, catalogs, identity, compliance)

  • Experience in regulated environments with staged rollouts

About us

We are a global technology company dedicated to building the future of entertainment and fan-centric experiences.

With commercial markets in Brazil, Belgium, Poland, Romania, and Serbia, our company has evolved from a leading sports betting and gaming operator into a diversified product and tech organization, gathering more than 5,000 dedicated people across our teams.

Shaping the future of play

At Super, we are creating a unique entertainment ecosystem engaging millions of customers worldwide. Our product and technology teams in Amsterdam (the Netherlands), Madrid (Spain), Zagreb (Croatia), London (UK), and Bucharest (Romania) are building the playstack that will champion the future of play.

Our ambitious growth strategy focuses on expanding across Europe and Latin America while delivering immersive customer experiences and creating lasting value for our customers, partners, and communities.

Global recognition and standards

The company’s long-term strategy is supported by world-class investors. In 2019, Blackstone, the world’s largest alternative asset manager, made a strategic minority investment of €175 million. In 2025, we strengthened our financial position through a €1.3 billion refinancing agreement, reinforcing our partnership with Blackstone and enabling accelerated global expansion.

Super is committed to the highest standards of compliance, safety, and responsibility. As such, we are active members of the International Betting Integrity Association (IBIA) and the European Gaming & Betting Association (EGBA).

 

Job details

Workplace

Office

Location

Croatia

Job type

Full Time

Experience

Senior · 3+ years

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