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Frontend Developer (m/w/d) – TypeScript / React / UX

Othermo

Hybrid Hybrid permanent

Posted: February 2, 2026

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Quick Summary

A frontend developer is required to build reactive and user-friendly frontends, handling data flows and workflows, UI features end-to-end, product, backend, embedded systems, operations, APIs, formular flows, validation, error handling, and reviews.

Job Description

Deine Rolle in einem Satz:
Du baust reaktionsschnelle, zugängliche Frontends in TypeScript/React, die Datenflüsse und Workflows unserer IoT-Plattform klar, performant und zuverlässig an unsere verschiedenen Zielgruppen bringen.


Deine Rolle bei uns:
Du verantwortest UI-Features End-to-End: vom UX-Entwurf über saubere Komponenten (React/TypeScript) bis zu State/Queries, Tests, Observability und Accessibility. Du arbeitest eng mit Product, Backend, Embedded Systems und Operations zusammen, integrierst APIs, gestaltest Formular-Flows/ Validierung/ Error-Handling und sorgst mit Reviews und kurzen Iterationen für stabile Releases.


Deine Aufgaben:
• Entwicklung wartbarer React/TypeScript-Features inkl. State/Data-Layer (z. B. Zustand/React Query).
• API-Integration (REST; ideal WebSockets/MQTT), Formular-Flows, Validierung & Fehlermanagement.
• UI-Komponenten & Design-System: Storybook-Beiträge, Docs, Accessibility (ARIA, Tastatur-Nutzung).
• Qualität: Unit-/Integrations-/E2E-Tests, Performance-Checks, CI/CD (GitLab).
• Zusammenarbeit mit Product/UX (Figma), saubere Handover-/Feedback-Schleifen, kurze Iterationen.


Das bringst du mit:
• Sehr gute TypeScript/React-Praxis (Hooks, Composition, Best Practices).
• Erfahrung in API-Anbindung (REST; ideal Realtime via WebSockets/MQTT).
• Testing-Routine (Jest/RTL/Playwright) & CI/CD-Gewohnheit (GitLab, Docker).
• UI/UX-Grundlagen: Design-Systeme, Semantik, Accessibility, Figma-Handover.
• Sprache: Deutsch C1 (Kundenkontakt), Englisch B2


Warum othermo?:
Wir verbinden Technologie mit echtem Kundennutzen und setzen auf pragmatische Lösungen statt Buzzwords. Bei othermo arbeitest du in einem Umfeld, in dem deine Ideen gehört werden, dein Beitrag zählt und du direkt mitgestalten kannst, wie die Energiewende im Gebäudebestand gelingt.


Das erwartet dich:
• Arbeit am produktiven UI einer IoT-Plattform mit messbarem Impact.
• Klarer Qualitätsrahmen: DoD, Code-Reviews, Tests & Performance/Accessibility-Guardrails.
• Moderner Tech-Stack: React/TS, FastAPI-Backends, GitLab CI/CD, Docker, Storybook.
• Hybrid in Alzenau (i. d. R. 1-3 Tage/Woche onsite), Rest flexibel.
• Optimale Ausstattung, Transparenz, kollegiales Miteinander sowie festes Weiterbildungsbudget.


So kannst Du uns erreichen!:
Klingt nach dir? Dann freuen wir uns auf deine Bewerbung! Schick uns deinen Lebenslauf und erzähl uns in ein paar Zeilen, warum du Lust auf diese Rolle hast.

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