Front-End Developer / App Developer (m/f/d)

April 01, 2026

Overview

Application

Front-End Developer / App Developer (m/f/d)

Permanent

Full-time

Hybrid

About us

TXO was founded in 2005 and supports companies worldwide through every stage of the technology lifecycle. We help industries optimize, manage, deploy, and resell infrastructure technology.

Our vision is to extend the technology lifecycle while conserving resources, minimizing waste, and preserving value. In this way, we help companies worldwide increase their efficiency, reduce costs, and achieve environmental goals.

TXO GmbH handles the revenue‑generating dismantling and recycling of decommissioned telecommunications, energy, and rail infrastructure. Our customers benefit in many ways: We create space for upcoming modernization projects, reduce CO₂ emissions through the local recovery of raw materials from the urban mine, and simultaneously generate significant revenue through the sale of used equipment and raw materials. These steps are supported by in‑house developed web‑based and mobile applications, the development and enhancement of which will be among your primary responsibilities.

By applying principles of the circular economy, supporting EOSL, and ensuring responsible resource recovery, we help extend the lifespan of infrastructure while reducing dependence on primary raw materials. In this way, we enhance our clients’ performance, cost‑effectiveness, and sustainability.

With offices in the UK, the US, Sweden, France, Germany, Australia, Japan, and Brazil, we operate globally and, with the support of TowerBrook Delta, are driving the transition toward a smarter, more sustainable technology landscape.

Join our team and help shape technology for a more sustainable future.

As a front‑end / app developer, you will work in an international environment on the further development and modernization of our web‑based applications and assist with the integration of mobile clients. In addition to implementing modern user interfaces, you will also contribute to backend components, database connections, and the development and integration of interfaces. Working closely with the team, you will help implement powerful and future‑proof software solutions to manage our processes.

Responsibilities

The following describes the key areas of responsibility.

Contributing to the further development and modernization of database‑driven web applications
Designing and implementing solutions for integrating mobile clients
Implementing and integrating REST APIs and other interfaces
Contributing to backend development as well as database structure and customization
Collaborating in agile development processes and interdisciplinary project teams
Technological advancement of existing solutions and active participation in the design of new architecture

Requirements

A completed vocational training program or degree in computer science, or a comparable qualification
At least 2 years of professional experience in application development, preferably in web or mobile environments
Experience in developing database‑driven applications and working with APIs
Practical knowledge of .NET Core (C#) and Blazor or TypeScript and React is desirable
Openness to new technologies and the ability to work independently throughout all phases of the development process
Enjoyment of collaborating in an international work environment
Ability to work well in a team, as well as a structured and solution‑oriented approach to work
Good written and spoken German and English skills
A competitive salary and a permanent full‑time position in a great team with a flat management structure, high motivation, a fun work environment, and regular team events.
A varied and exciting role in a modern, dynamic, and innovation‑driven industry with a focus on eco‑friendly and sustainable business models.
Hybrid work (50% in the office) in Solingen, Germany.
A modern approach to effective work (flexible hours, bike leasing, public transportation pass, company laptop, company cell phone, etc.).

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Hollybank Trustees Ltd