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Deploja AB

Backend Java Engineer

Deploja AB Malmö, Skåne County, Sweden

IT Services and IT Consulting · 11-50 employees

Oct 07
java Senior (5-10 yrs) Full-time Sweden
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About the role

You will work as a consultant on internal projects or with external clients to develop and scale customer-facing web services. The role involves building robust backend systems while ensuring high performance, reliability, and security.

What they look for

Java Distributed systems Concurrency REST services Netty Cassandra Redis CI/CD Automated testing Performance tuning Authentication Authorization Memory management Garbage collection Virtual threads Reactive models

Requirements

Candidates must have at least 5 years of production experience as a backend engineer with deep expertise in Java and distributed systems. Strong knowledge of concurrency, data storage technologies, and CI/CD practices is required.

Full description

We now have a new requirement and are looking for a consultant colleague with the qualifications listed below. The position is part of our consulting business, which means you will be employed by us and work either with clients or on internal projects and assignments.

As part of your application, you may be presented to clients/partners as part of the recruitment process. If selected for the assignment, you will be employed by us and work either with clients or on internal projects and assignments as part of our consulting business.

Your Profile (Must-have requirements)

  • Strong production experience as a back-end engineer, typically 5+ years.
  • Deep Java knowledge, including memory model, garbage collection, allocation pressure and concurrency.
  • Experience with java.util.concurrent, virtual threads and/or reactive models.
  • Proven experience building and scaling customer-facing web services.
  • Strong understanding of authentication, authorization, availability, reliability and performance tuning.
  • Solid understanding of distributed systems, consistency, partitioning and failure modes.
  • Experience with data storage and caching technologies such as Cassandra, Redis, memcached or similar.
  • Experience building REST-based services using Netty or similar frameworks.
  • Experience with CI/CD tooling and automated testing.
  • Strong written and verbal communication skills in English.

Meritorious

  • Knowledge of cryptography standards and protocols such as PKCS, KMIP, X.509, AES, KDF or CA.
  • Experience with key handling, privacy-preserving systems or security-critical platforms.
  • Familiarity with ML systems, frameworks or algorithms.
  • Experience with GitHub, Maven, Docker, Spinnaker and Kubernetes.

Application deadline: 25-10-2026

About Us We currently employ experienced consultants in areas such as System Development, AI, Machine Learning, Testing, Cloud, Infra DevOps, and IT Project Management.

Working at Deploja is something entirely different from working at an ordinary consulting company—and we are really proud of that. So, what makes us unique?

We simply offer more than just a high salary and greater freedom; that’s just the beginning. With us, you’ll find the work environment and opportunities you deserve. Welcome to Deploja, where the grass is indeed greener!

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