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Sigma Software· Spotted 40d ago

Middle/Senior Java Developer

Location
Malmö, Skåne County, se
Employment
Full-time
Level
Senior
Experience
4+ years
Job function
Software/Internet/AI › Backend Engineering › Java Engineer

Posted Sep 28, 2026Last confirmed open Nov 7, 2026

About this role

  • 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
  • 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

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

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