Senior Backend / Integration Developer

Wearesi; Sweden; On-site; SEK 500,000 - 700,000; Full time

Job summary

Wearesi in Sweden is searching for a candidate to join their team specializing in energy efficiency and automation. The role involves working on the Connect platform, focusing on backend systems, API integrations, and protocols. Candidates should have strong skills in C# / .NET and experience with microservices.

This full-time position offers a supportive corporate culture that values collaboration, innovation, and individual contributions. Interested applicants should contact Teodor Andersson for further details or apply via email.

Qualifications

• Very good experience with C# / .NET.
• Experience with microservice architecture and Kubernetes.
• Protocol expertise including low-level binary protocols and IoT.

Responsibilities

• Responsible for our Connect platform, including API and messaging.
• Involved from design to delivery in our Kubernetes/Helm system.
• Collaborate with frontend, app, and UX teams.

Skills

C# / .NET

Microservice architecture

Kubernetes

Helm

AMQP

RabbitMQ

Low-level binary protocols

API design

Integration solutions

Test automation

Agile working method

Job description

Do you want to be an important part of a growing company, where a nice and pleasant corporate culture is highly valued? Good, because within the SI group we give you great opportunities for personal development and having fun at work is a matter of course for us! We are driven by creativity and innovation where the latest delivery should always be the best. Overall, we at SI are specialists in energy efficiency and automation for all types of properties and facilities where our best results are achieved when we work TOGETHER.

At SI, we work to integrate, develop and deliver solutions for energy efficiency, building automation and smart operations.
We are now looking for someone with deep experience in backend systems and integration solutions — you will be responsible for our Connect platform including API, messaging, IoT devices and low-level protocols.
You will be involved from design to delivery in our Kubernetes/Helm-powered system and contribute to our products reaching our vision of a sustainable built environment ecosystem.

• Very good experience with C# / .NET (8–9)
• Experience with microservice architecture, Kubernetes, Helm
• AMQP, RabbitMQ or similar messaging system
• Protocol expertise (low-level binary protocols, IoT)
• Experience with API design and backend + integrations
• Observability – metrics/traces/logging (OTLP, Grafana)
• Test automation and manual testing in an integration environment
• Agile working method and delivery focus
• Ability to collaborate with frontend, app and UX teams
• Interest in property automation and Proptech solutions

Get to know us at SI
The SI Group is a Nordic group that is passionate about creating the energy-smart properties of the future.

TOGETHER we have cutting-edge expertise in building automation and energy efficiency. We develop software and systems to achieve ambitious sustainability goals and our vision of an energy-efficient world.
We currently have over 450 employees in 34 offices in Sweden, Norway and Finland, and work closely with our customers to deliver smart, sustainable and user-friendly solutions.
We are a technology company that combines digital innovation with sustainable social benefit. We build platforms and solutions that make properties smarter, more energy efficient, and better for both people and the planet.

We bring together developers, product owners, engineers and designers with a common driving force: to create technology that actually makes a difference. We work agilely, cross-functionally and with high trust in each other's expertise.
We believe ininnovation, courage and collaboration. This means you get great responsibility, a clear mandate and room to influence. Here we don't just build technology - we build the sustainable infrastructure of the future!

We are a leader in climate and energy smart solutions for environments such as offices, homes, hotels, spas & baths, water and sanitation and logistics properties. Through our broad and deep expertise, we cover the entire chain – from technology to business development – and have the privilege of working on exciting development projects where we explore new technology.
Our corporate culture is characterized by humble collaboration, business drive and technical curiosity. In our decentralized structure with strong local responsibility

Welcome to SI – together towards the next generation's energy-efficient world.

APPLICATION DEADLINE:Selection is ongoing.
START:Start as agreed
PLACE:as agreed
EXTENT:Full-time
SALARY:Fixed salary as agreed
CONTACT:Email your application to [e-mail]
FOR QUESTIONS CONTACT:Teodor Andersson at [e-mail]