Senior Frontend Engineer - Energy Management @Optima

Optima is part of the Heizma group. Our goal is green energy for everybody. At Optima, we set out to build one of the world’s most advanced energy management platforms. We firmly believe that affordable yet flexible energy management will be essential for transitioning fully into renewables.

To achieve this goal, our team operates on all layers of the stack - from hardware installations at end customers, towards crunching millions of data rows per day in the cloud.

As Senior Frontend Engineer, your task will be to develop and maintain our user-facing applications - from web based mobile apps for end users, over complex configurable dashboards and visualisations to real-time device setup flows.

If data visualization, real-time capable frontends and building user friendly UI for technical products excite you, this job is for you.

• Develop and maintain our user-facing React web applications
• Design and implement data visualization for high-dimensional time series data with a focus on clarity to fulfill user needs
• Develop and maintain our IONIC/React mobile applications
• Accomplish small UI/UX design tasks on your own based on an existing design system
• Ensure usability and high product quality throughout the project

• Be a team player with a growth mindset and in for the shared mission
• Have solid experience in React, Typescript, Tailwind
• Be able to complete simple UX-Design tasks yourself, potentially getting deeper into product development
• Have a good understanding of data and specifically data visualisation - while always keeping the end user in mind
• Be effective with AI powered coding tools like Cursor

• A competitive salary of at least €70.000,00
• Flexible remote policy
• Work on something meaningful, with a team that’s here for the same mission
• A fast paced environment, that still puts psychological safety and growth first
• Potential to transition into a leading role as our team grows

Application Process:

• Screening Call (we’ll talk about your background & mutual expectations)
• Tech Interview (with live coding)
• Take Home Exercise
• Culture Fit Interview

Are you ready to become part of our team and make a difference in the world? Then we look forward to receiving your application!

At Optima, we value and promote equal opportunities and diversity in our team, as we firmly believe that different perspectives strengthen our innovative power. Regardless of gender, age, ethnicity, religion, sexual orientation, disability or other personal characteristics - everyone is welcome and respected at Heizma. Our recruitment practices aim to minimize prejudice and ensure fair treatment of all applicants. Together, we are not only working on the heating transition, but also on shaping a more sustainable and inclusive future.