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MiddleSenior Java Developer

Sigma Software


Job Location:

Malmö - Sweden

Monthly Salary: Not provided by the employer
Posted: 29 September 2026 (3 days ago)
Application Deadline: 27 December 2026
Vacancies: 1 Vacancy

Job Summary

  • Design develop and maintain scalable Java backend services and internal frameworks
  • Participate in architecture discussions and contribute to technical solution design
  • Build and support customer-facing services with a focus on reliability availability security and performance
  • Investigate and resolve complex production issues related to concurrency and distributed systems
  • Work with authentication authorization caching data storage and service integrations
  • Collaborate with multiple engineering teams and coordinate technical dependencies
  • Participate in code reviews automated testing CI/CD processes and release activities
  • Prepare technical documentation and communicate technical decisions to stakeholders
  • Take end-to-end ownership of features and technical solutions from concept to production

Qualifications :

  • 4 years of commercial experience in Java backend development
  • Strong hands-on experience with Java and distributed systems
  • Deep understanding of Java internals including the Java Memory Model garbage collection concurrency and multithreading
  • Experience debugging production issues in high-load environments
  • Strong knowledge of distributed systems concepts including consistency reliability partitioning and failure handling
  • Experience building and scaling customer-facing backend services
  • Experience with authentication and authorization mechanisms
  • Hands-on experience with Cassandra Redis Memcached or similar technologies
  • Experience developing REST-based services using Netty or similar frameworks
  • Experience with CI/CD pipelines and automated testing
  • Strong analytical and problem-solving skills
  • Upper-Intermediate or higher level of English

WILL BE A PLUS

  • Knowledge of cryptography standards and protocols such as PKCS KMIP X.509 AES KDF and CA
  • Experience working with security- and privacy-sensitive systems
  • Familiarity with machine learning systems or algorithms
  • Experience with GitHub
  • Experience with Maven Docker Kubernetes Spinnaker or similar tools

Additional Information :

PERSONAL PROFILE

  • Strong sense of ownership and accountability
  • Ability to work independently in autonomous engineering teams
  • Analytical and problem-solving mindset
  • Attention to detail and engineering quality
  • Strong communication and collaboration skills
  • Ability to work effectively in complex distributed environments

Remote Work :

No


Employment Type :

Full-time


About Company

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At Sigma Software, we are involved with the client’s team to contribute to the design and development of a technical solution for their tokenized domain reservation platform. We started by assigning a software architect to design the smart contracts and integrate blockchain into the s ... View more

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