Software Engineer

Lexenergy; Göteborgs kommun; On-site; SEK 900,000 - 1,100,000; Full time

Job summary

Lexenergy is seeking a Software Engineer – Energy Systems & Smart Charging to join our tight-knit software team in Gothenburg. You’ll work on core logic powering LexHub and LexBox, building real-time control and data features that ensure chargers, batteries, and flexibility solutions run reliably in live installations.

The role favors ownership and close collaboration with hardware, with hands-on development from idea to deployment.

Qualifications

• 1–5 years of backend or hardware-close software experience.
• Experience in smaller, fast-moving teams and taking ownership of full development cycle.
• Strong proficiency in Golang or Python and system-to-system communication (MQTT, APIs).
• Curiosity to understand chargers, batteries, grid, and control.

Responsibilities

• Build and improve control logic for charging, battery systems, and flexibility services
• Develop and enhance internal APIs and data structures
• Integrate third-party services
• Troubleshoot, test, and validate features in live installations
• Collaborate with the team to ensure stable operation and a strong user experience

Skills

Golang

Python

Embedded/Hardware-close

APIs

Tools

MQTT

REST APIs

Job description

Software Engineer – Energy Systems & Smart Charging

Do you want to help build the energy system of the future – for real? We’re looking for a key person to join our software team, someone who enjoys working close to hardware, taking ownership, and rolling up their sleeves when needed. We’re a small, tight-knit team solving big problems together. With us, you get both ownership and pace – without ego.

The Role

You will work on the core logic that powers our products: LexHub and LexBox. This includes control systems, real-time data, integrations, and operational reliability – everything required to ensure our chargers, batteries, and flexibility solutions perform reliably in real-world conditions.

A key part of the role is working closely with our hardware – developing software that runs directly in our products where charging, batteries, and control systems interact in real time. This is a role for someone who wants to see the direct impact of their code in live installations, not just in a test environment.

Your Responsibilities

• Build and improve control logic for charging, battery systems, and flexibility services
• Develop and enhance internal APIs and data structures
• Integrate third-party services
• Troubleshoot, test, and validate features in live installations
• Collaborate with the team to ensure stable operation and a strong user experience

We Believe You Have

• 1–5 years of experience in backend development, system development, or software close to hardware – we value drive over years of experience
• Experience working in smaller, fast-moving teams and taking ownership of the full development cycle – from idea and implementation to testing and shipped functionality
• Strong proficiency in Golang, Python, or similar languages
• Experience with system-to-system communication (e.g., MQTT, APIs)
• Curiosity to understand the full system: chargers, batteries, grid, control
• A drive to solve real-world problems that are critical to live operations

The Personality We’re Looking For

This is the most important part for us. You are someone who:

• Takes initiative and enjoys ownership
• Is humble, confident, and easy to collaborate with
• Is curious, courageous, and enjoys testing, learning, and improving
• Thrives in an environment where decisions move fast and teamwork is standard
• Enjoys making complex technology work reliably, even when conditions aren’t perfect

What We Offer

• The opportunity to build next-generation energy systems – hands-on and tangible
• Close collaboration with an experienced team passionate about technology and societal impact
• An environment with high responsibility and strong trust
• A steep learning curve and real opportunity to influence
• A flexible, supportive, and low-prestige work culture
• A workplace where we laugh a lot, work smart, and celebrate progress

Note: This position is 100% on-site at our office in Aröds Industriområde, Gothenburg. We strongly believe that physical presence builds better collaboration, faster problem-solving, and stronger team spirit.