Frontend Developer

Do you enjoy building interfaces in React and TypeScript that not only work well, but also remain scalable and easy to maintain? Do you like making frontend and APIs (REST/GraphQL) fit together seamlessly? And do you enjoy working in a team where code quality, clear communication, and ownership matter? Then keep reading.

Within the Atlas team at TKH Security, you will help build a new product. This is not a maintenance project, but real product development. You will work alongside experienced developers who challenge each other through code reviews, pairing, and strong architectural discussions.

You will build features that go beyond a single component. Think of flows that touch multiple services, API integrations, and interfaces that remain reliable even under pressure. You will also contribute to how we design, test, and release features through a clean build and deployment pipeline.

We work in an agile, international, and pragmatic way. Sometimes that means moving fast toward a deadline, without losing sight of quality or security. In a new product environment, unexpected technical challenges are part of the job, and that is exactly what gives you energy.

What will you do?

• Build and improve frontend features in React and TypeScript (ES6+), with a focus on performance and usability.
• Integrate APIs and data flows through REST and GraphQL.
• Translate designs into reusable UI components using HTML5 and CSS3.
• Contribute to architecture discussions and create or interpret diagrams (UML/C4) to communicate decisions.
• Deliver code with strong Git hygiene (logical branching, clear commits, clean PRs).
• Troubleshoot issues in a structured way across codebases and environments.
• Provide feedback through PRs, pair with colleagues, and support junior and mid-level developers.
• Plan and refine work: estimate realistically, meet commitments, and raise risks early.

Do you have experience in Usability?, Do you have a Middle-level professional education?, * 3-5 years of experience as a Frontend Developer (or in a similar role).

• Expertise in React and TypeScript/JavaScript (ES6+).
• Strong skills in HTML5 and CSS3.
• Experience with API integrations through REST and/or GraphQL.
• You work cleanly and consistently with Git (clean commits, logical branch management, strong PRs).
• You are comfortable working in an agile environment and think with a product mindset.
• You stay in control when working at pace and with deadlines: you estimate realistically, keep your commitments, and flag risks on time.
• You communicate clearly and directly in an international team (strong English skills).

Innovative work environment: work with modern technologies in a professional development environment. Within our development teams, we continuously improve our products and give you the space to contribute ideas for technical solutions and new functionality.

Professional growth: plenty of education and training opportunities to further develop your skills. You will work with experienced developers who help each other grow through code reviews, collaboration, and knowledge sharing.

Attractive employment conditions: a competitive gross monthly salary between €3,400 and €4,500 based on full-time employment, a group discount on supplementary health insurance, a solid pension scheme, and the option to work partly from home (2 days from home, 3 days in the office)., Education Level MBO/HBO Provinces Zoetermeer Industries R&D Hours per week 32 - 40 Experience (Min) 3 Salary 3400 - 4500 EUR per month Contact details jobs.nl@tkhsecurity.com

Open and informal working culture: an environment where you can be yourself, where collaboration is central, and where developers work together to build new products and solutions. Easy to reach: as a Frontend Developer, you will regularly work from our modern head office at the Dutch Tech Campus in Zoetermeer. The office is easily accessible by car and public transport from The Hague, Delft, Rotterdam, Leiden, Gouda, and Alphen aan den Rijn. Our recently modernised office offers a spacious working environment and excellent facilities to work comfortably. About TKH Security TKH Security is an international technology provider with 12 offices worldwide. We develop and deliver systems in the areas of Security Management, Asset & Site Management, and Parking Guidance. Our solutions are used in, among others: * Government, healthcare, education, and transport * Telecom, energy, and critical infrastructure * Airports, retail, data centres, and logistics hubs Our strength lies in the combination of reliability, integration, ease of use, and cybersecurity. Everything is developed in-house and continuously improved. Working at TKH means working with world-class technology, in a team that is driven by results and innovation.