Senior Backend Developer / DevOps Engineer

Zpark Energy Systems AB; Luleå kommun; On-site; SEK 50,000 - 70,000; Full time

Job summary

A leading energy systems company in Luleå is looking for a Backend Developer to design, develop, and maintain backend services using Go. You will be responsible for optimizing software for performance and collaborating with various teams to deliver high-quality solutions. Candidates should have a minimum of 5 years of experience in backend development, and familiarity with Linux-based IT systems. Strong communication skills in English are essential, and knowledge of Swedish is a plus.

Qualifications

• Minimum of 5 years of experience in backend development.
• Experience with Go or other typed backend languages.
• Strong familiarity with Linux-based IT systems.

Responsibilities

• Design, develop, and maintain backend services using Go.
• Optimize software for performance, efficiency, and scalability.
• Collaborate with front-end developers and firmware engineers.

Skills

Backend development

API design

Problem-solving

Communication

Collaboration

Tools

Go

PostgreSQL

Redis

Git

Apache Kafka

Job description

You will play a key role in designing, developing, and operating our backend system. You will work closely with our software and firmware teams to build reliable, scalable, and efficient services. Your experience in backend development, hosting environments, and operational tooling will be important in shaping and improving our platform.

What you will do:

• Design, develop, and maintain backend services and systems using Go and the Twelve-Factor App methodology.
• Design, develop, and maintain DevOps environments and processes; including solutions for CI/CD, release processes, monitoring, and alerting.
• Optimize software for performance, efficiency, reliability, and scalability.
• Troubleshoot and debug applications to ensure smooth functionality.
• Collaborate with front-end developers, firmware engineers, and other stakeholders to deliver high-quality software solutions.
• Participate in code reviews and provide constructive feedback to team members.

Your Profile

• Minimum of 5 years of experience in backend development.
• Experience with Go is a strong advantage. We also welcome candidates with solid backend experience in other typed backend languages.
• Experience and familiarity with concurrent and asynchronous programming.
• Proven experience with RESTful API design and implementation.
• Strong familiarity with Linux-based IT systems and hosting environments. Some familiarity with cloud service providers (AWS, Azure, or Google Cloud) is beneficial.
• Experience with distributed systems and cloud-native applications; including common challenges around reliability, coordination, and data consistency.
• Strong knowledge of databases (PostgreSQL, Cassandra) and expertise with in-memory caching solutions (Redis or comparable).
• Experience with distributed event-streaming and messaging systems, such as Apache Kafka or NATS.
• Experience working with version control systems (Git) in collaborative environments, including understanding different workflow strategies and their trade-offs.
• Excellent problem-solving skills and attention to detail with the ability to make sound trade-offs based on business needs and technical requirements.
• Ability to work independently and as part of a team.
• You communicate clearly and are comfortable supporting and mentoring less experienced developers.
• Strong communication skills in English (written and spoken); proficiency in Swedish is a plus.