**Zertificon Solutions – Software Manufacturer since 2004. **We are IT security specialists: our products encrypt business communications. More than 25% of the 100 highest-revenue companies in Germany, as well as hundreds of medium-sized enterprises across all industries, already use our Z1 encryption solutions. We have big plans and continue to grow steadily. Nearly 140 employees are already working with us in Neukölln. Join our professional, highly qualified team: take on challenges, share your knowledge, learn new things, and discover your potential!

## Backend Developer PHP (f/m/d) - IT Security Business

### Responsibilities

As a Backend Developer, you'll take a leading role in developing **PHP-based microservices and APIs**. Do you also prioritize clean code as much as we do? You would be a great fit for our team.

- As part of a 7-person team, you will steer the development of microservices and RESTful APIs
- Collaborating with other teams, you will set service boundaries and make sure microservices communicate well
- You will monitor the performance and fix any issues in order to maintain low latency and high availability

### Qualifications

- Minimum 3 years experience as a PHP Developer with a focus on Microservices and APIs
- Strong skills in PHP, RESTful API design, and frameworks like Symfony, Laravel, or Lumen
- Experience with databases (e.g., MySQL, PostgreSQL, or NoSQL)
- Knowledge of container technologies (Docker)
- Understanding of version control systems, continuous integration, and continuous deployment (CI/CD) pipelines.
- Nice to have: Knowledge in GoLang
- You explain technical topics so clearly that everyone can work together productively in meetings, regardless of their technical background.
- Languages: **please pay attention! German (minimum B1) is required for this position,** alongside fluent English

### We offer:

- **Flexible working hours** and home office possible
- **Mobility:** free Germany ticket, job bike leasing or car parking
- **Allowances** for food (e.g. Lieferando) and internet in the home office
- **Benefits in the office:** Roof terraces & green courtyard, organic fruit and drinks, parcel acceptance
- **Get-together:** pizza Friday in the office, regular team events, big summer party

### Why Zertificon?

Zertificon stands for *securing digital business*. We develop trusted IT security solutions "Made in Germany" – built for businesses that value both protection and usability.

- **Independent & committed:** For over 20 years, we’ve built secure communication tools – as an owner-managed company with a clear stance
- **Purpose-driven:** We believe that digital communication must be secure and free. If you think Edward Snowden did the right thing as a whistleblower, we might just share the same values. As a sign of our support, we donate €1,000 to an organization that supports Edward Snowden for every new hire who mentions him in their application
- **Hands-on excellence:** We take on complex challenges because we can. Our in-house experts are top-tier – even external specialists often learn from us. When we want the best, we build it ourselves
- **Agile by conviction:** We think fast, act pragmatically, and improve continuously. No bloated processes, no “that’s just how it’s always been done.” Initiative is welcome – but of course, it will be challenged, and not every idea will make it through unchallenged
- **Security that works:** We build software that’s not only secure, but actually usable – not just for large enterprises with dedicated highly skilled IT teams, but also for small and mid-sized businesses that need strong security without the complexity
- **Diverse & international:** Our team of 120 people from 30+ countries shares one mission: making secure digital communication easily accessible to businesses of all sizes

**If that resonates with you, we’d love to hear from you.**

Want to know more? Please have a look at our Work at Zertificon page: [https://www.zertificon.com/en/it-jobs-berlin/work-at-zertificon](https://www.zertificon.com/en/it-jobs-berlin/work-at-zertificon)

**Questions?**

You can reach our HR team at

[jobs@zertificon.com](https://mailto:jobs@zertificon.com)