Senior Backend Engineer

Rasulson Consulting; Malmö kommun; On-site; SEK 900,000 - 1,300,000; Full time

Job summary

Rasulson Consulting is seeking a Senior Backend Engineer to design, develop and maintain highly available Java services for large-scale platforms. You will own the full software lifecycle, focusing on security, reliability and performance while solving complex production challenges.

The role involves architectural input, automation, testing and collaboration with cross-functional teams. The ideal candidate has 5+ years in backend systems, deep Java expertise and a strong grasp of distributed

Qualifications

• 5+ years of experience building and operating production-grade backend systems.
• Strong experience with RESTful APIs and distributed architectures.
• Expert Java knowledge including memory management, GC, and JVM internals.
• Experience with security, uptime and performance in customer-facing systems.
• Proficient in automated testing, deployment automation and CI/CD pipelines.
• Understanding of scalability, partition tolerance, failure recovery and service resiliency.

Responsibilities

• Design, develop and maintain high availability Java services.
• Build fault-tolerant systems focusing on performance and observability.
• Lead architectural reviews and collaborate with platform, security and product teams.
• Drive automation, testing and continuous delivery practices.
• Own the full software lifecycle from architecture to production operations.

Skills

RESTful APIs

Event-driven architectures

Java performance optimization

Concurrency/multithreading

Distributed systems

CI/CD pipelines

Automated testing

Security uptime reliability

Observability

Tools

Maven

Docker

Kubernetes

GitHub

Spinnaker

Job description

Assignment: Senior Backend Engineer

About the assignment
We are seeking a senior Backend Engineer to work on large-scale distributed platforms for our client, a company operating technology platforms at significant scale. You will design, develop and maintain highly available, performance-critical Java services where security, scalability, reliability and high engineering standards are essential. You will take responsibility across the full software lifecycle, from architecture and implementation through to deployment and production operations.

Responsibilities

You will build fault-tolerant systems focused on performance, reliability and observability, while investigating and resolving complex production issues related to latency, concurrency, scalability and system behaviour under load. The role also includes technical design reviews, architectural decision-making, and collaboration with architects, platform teams, security engineers and product stakeholders. You will help advance engineering practices around automation, automated testing and continuous delivery.

The role suits someone who enjoys complex technical problem-solving, collaborating across engineering disciplines, and taking ownership of systems operating at very large scale.

Required qualifications

• Excellent communication and collaboration skills
• Strong practical experience developing RESTful APIs and event-driven architectures
• Expert-level command of Java, including memory management and garbage collection, JVM internals, performance optimisation, asynchronous and reactive programming models, and concurrency/multithreading
• Experience working with customer-facing systems where security, uptime and performance are business-critical
• Strong experience with automated testing, deployment automation and CI/CD pipelines
• Deep understanding of distributed systems, including scalability patterns, partition tolerance, failure recovery, service resiliency, and the trade-offs between availability and consistency
• At least 5 years of experience building and operating production-grade backend systems
• Experience with storage and caching technologies used at high scale, such as Memcached, Cassandra, Redis or comparable distributed data platforms

Nice to have

• Experience with machine learning infrastructure or large-scale data platforms
• Experience with cryptography, certificate management, PKI or security-focused systems
• Experience with Java frameworks for asynchronous networking
• Experience with Kubernetes and containerised infrastructure
• Experience with tools such as Maven, Docker, Spinnaker, GitHub or equivalent alternatives

Scope and location

The assignment involves working on large-scale, production-grade backend systems within a global engineering organization. Further details on scope, location/remote arrangements and start date will be shared separately upon interest.