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Senior FrontEnd Developer

About us

Helicon builds software for energy companies and startups with energy-related products (e.g ABB, Polarium, Stockholm Exergi, Hitachi Energy). Our experienced software engineers and data scientists specialize in product development, data engineering, and cloud infrastructure.

A typical project includes some kind of data infrastructure (where we use tools like: Kubernetes, Airflow, PostgreSQL, TimescaleDB, InfluxDB, Kafka), a machine learning component (typically built around Spark and Tensorflow), APIs and software to facilitate communication between services (e.g. Python, FastAPI, Django, Kafka, RabbitMQ), and UIs where end-users can operate the system and visualize data and analyses (e.g. React, ThreeJS, WebGL). The front-end components of our systems vary from administration panels and analytical dashboards, to complex 3d-based digital twins. 

About you

  • You strike a balance between moving fast and creating scalable and
    maintainable solutions.

  • You’re super-passionate about code, technology, and user experience.

  • You’re empathetic about – and understand the needs of – the customer.

  • You enjoy discovering, defining, and solving problems.

  • You’re excited to learn and eager to teach.

  • You make pragmatic scoping decisions and can explain why the team is
    doing something a certain way.

  • You work with your team to tackle technical challenges and to level up in the process.

  • You can theorize and think in abstractions, but understand the importance of getting things done.

  • Fluent in Swedish and English

About the role

  • Create and maintain React component libraries, data visualization components, and application frameworks.

  • Provide mentoring and push the team forward in terms of front-end development methodologies.

  • Rapidly and precisely plan and execute front-end application development

  • Perform positive code reviews and provide meaningful feedback.

What we are looking for

  • 5+ years experience with HTML, CSS, and JS.

  • You know the ins and outs of React.

  • You write high-quality code that is easy to read, understand, and test.

  • Strong understanding of git and version control in general.

  • You’ve spent many hours thinking about the best way to manage the state in front-end applications.

  • Strong opinions on how to best connect applications with external APIs.

  • Fundamental understanding of application profiling and performance

  • Ability to build applications that are fed large amounts of data but remain
    highly responsive.

  • Leadership experience and strong communication skills.

  • Able to work in a hybrid setup in Stockholm


  • WebGL, related libraries, and 3D programming in general.

  • An eye for design and knowledge of current design trends and UX best

  • Understanding of data visualization methods and information communication.

  • Experience in building user interfaces from scratch

Posted a month ago

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Helicon Technologies