Software Engineer - Fullstack (AI x Greentech) (m/f/d)

EON Systems, Inc.; Augsburg; On-site; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Equity opportunities

Gym membership

Transport ticket

Workation weeks (remote)

Job summary

Reonic is building the AI-native operating system for renewable installers. You will develop interfaces that simplify complex energy workflows, owning features from idea to live product. Expect fast iterations, close collaboration with product and design, and a culture that rewards ownership and impact.

You'll work with TypeScript, Node.js, PostgreSQL, Prisma, React and Tailwind to ship real product quickly. Join a team that values ambition, impact and rapid growth in the energy transition.

Qualifications

• Experience building frontend with React and TypeScript.
• Experience working on full-stack features across frontend and backend.
• Strong ownership and ability to Ship fast with high quality.

Responsibilities

• Build high-impact features used daily by real businesses.
• Ship fast using TypeScript across the stack.
• Dive into Node.js backends and handle data with PostgreSQL and Prisma.
• Turn complex workflows into clean, intuitive interfaces with React and Tailwind.
• Collaborate with product and design with minimal handoffs.
• See code go into production within days.

Skills

TypeScript

Node.js

PostgreSQL

Prisma

React

Tailwind

UX focus

Ownership

Tools

TypeScript

Node.js

PostgreSQL

Prisma

React

Tailwind

Job description

Build the Interface of the Energy Transition

Most engineering jobs ask you to ship fast and care about quality.

This one asks you to build the interface of an entire industry.

At Reonic, we're building the AI operating system for renewable installers, with competitive pay, growth opportunities and a strong culture based on ambition, impact and ownership.

And we're doing it fast.

What makes this role different

• Your work directly impacts how renewable energy gets deployed
• You’ll own features end-to-end - not just tickets
• You’ll feel the speed: idea → code → live → feedback
• No endless planning cycles. No hiding behind process.

Just building, shipping, improving.

You will:

• Build high-impact features used daily by real businesses
• Ship fast using TypeScript throughout the whole stack.
• Dive into Node.js backends and handle data with PostgreSQL and Prisma
• Turn complex workflows into clean, intuitive interfaces with React and Tailwind
• Work closely with product and design - no layers, no handoffs
• See your code in production within days, not months

And if you want more:

Work with Rust to extend our Simulation that predicts the future of our customers project

This is not a narrow role. It's a playground for builders.

You’ll thrive here if you…

• Love turning complexity into simplicity
• Care about UX as much as clean code
• Prefer ownership over instructions
• Move fast, learn fast, and fix things instead of debating them
• Actually want to build, not just talk about building

If you need perfect specs and slow timelines - this isn't it.

If you want to grow fast and ship real product - you'll love it.

Why join now

• Competitive pay and equity opportunities
• High ownership from day one and unlimited growth options
• Steep career development: No cycles - rewarded when earned
• Gym membership or Transportation ticket: pick between Urban sports club or D-ticket
• Uber eats and Uber drive on us when you finish late
• Take a few "workation" weeks a year-work remotely from anywhere.
• We're still early. Be at the forefront of the energy transition.

About Reonic

At Reonic, we're building the AI-native operating system for renewable installers.

We're replacing fragmented tools (CRM, design, proposals, project management, invoicing) with a single integrated platform that supports installers across the full project lifecycle. Today, more than 3,000 companies across 13 countries use Reonic, and it's just the beginning.

We're a well-funded VC-backed startup reshaping how the world uses energy. With top-tier people, great investors, and massive goals ahead. We work hard and move fast, to build a company that lasts, and that brings lasting change.