SENIOR JAVA BACKEND ENGINEER

Sigma Technology Tech House AB; Lunds kommun; On-site; SEK 850,000 - 1,450,000; Full time

Job summary

Sigma Technology Tech House AB in Malmö seeks an experienced Senior Java Backend Engineer to design and scale customer-facing web services. You will develop reliable, high-performance Java backends and tackle production issues in a distributed systems environment.

You will optimize performance, contribute to architecture decisions, and collaborate with cross-functional teams. The role involves CI/CD practices, on-site work in Malmö, and clear communication in English to stakeholders and

Qualifications

• Must have strong production experience in Java backend development.
• Significant experience with distributed systems and scalable services.
• Familiarity with data storage and caching technologies and auth mechanisms.
• Ability to write clear design documents and communicate technical decisions.

Responsibilities

• Develop and maintain scalable, reliable, high-performance Java backend services.
• Collaborate with cross-functional teams to design and implement features.
• Investigate and resolve complex production issues under real-world load.
• Contribute to architecture decisions and drive performance optimizations.
• Participate in CI/CD practices and ensure automated tests are in place.

Skills

Java

Backend engineering

Distributed systems

Performance tuning

CI/CD

English

Git

PostgreSQL

Redis

Kafka

Tools

Docker

Kubernetes

Design docs

Job description

We are seeking an experienced Senior Java Backend Engineer to join our dynamic team in Malmö, Sweden. This role demands deep expertise in Java and a strong background in building and scaling customer-facing web services. The ideal candidate will have significant production experience, a robust understanding of distributed systems, and familiarity with various data storage and caching technologies. You will be responsible for developing reliable, high-performance services, troubleshooting complex production issues, and contributing to architecture and design decisions in a collaborative environment.Develop and maintain scalable, reliable, and high-performance Java backend servicesCollaborate with cross-functional teams to design and implement new featuresInvestigate and resolve complex production issues under real-world concurrency and loadOptimize application performance including tuning garbage collection and allocation pressureRead and analyze source code of dependencies to solve problems beyond available documentationImplement and enhance authentication, authorization, and spam control mechanismsContribute to the design of distributed systems ensuring robustness and fault toleranceWrite clear design documents and communicate technical decisions effectively to both technical and non-technical stakeholdersParticipate in CI/CD practices and ensure high-quality automated tests are in placeOperate primarily on-site in Malmö, maintaining effective communication in English