Stellenausschreibung im Bereich Java
19.09.2025
Java Developer (f/m/d) – Secure Communication Services
Firmendaten des Stellenangebotes
Tempelhofer Weg 62
12347 Berlin
Ansprechpartner
FrauKate Lebedeff
jobs@zertificon.com
+49 30 5900 300-44
Details zur Stellenausschreibung
Javavollzeit
5 Jahre oder mehr
12347 Berlin
Stellenbeschreibung
Java Developer (f/m/d) – Secure Communication Services
Apply now: https://zertificon.jobs.personio.de/job/2110561#applyBecome a key player in shaping and maintaining secure, containerized services that make communication safe for everyone.
Your work will directly fuel innovation and success across the company. Step into an environment with flexible boundaries, powered by microservices and message brokers. Want to build your service in Go? Go ahead. Discovered a new framework, library, or concept? Bring it forward! You’ll be surrounded by open-minded colleagues who value fresh ideas and the balance of freedom and responsibility in daily work.
Help us push the limits of software distribution and development by creating containerized microservices in Java and Spring Boot at the core, while also embracing languages like Rust and Go to turn bold ideas into new products.
Together with your team, you will:
- Drive enterprise product development, finding new solutions and approaches to create cutting-edge features and strengthen our market position
- Anticipate blockers early, and act to prevent them
- Mentor and guide teammates for efficient, high-quality delivery
- Shape long-term product roadmaps and architectures
- Act as a bridge between your team and internal stakeholders, ensuring smooth collaboration
- Work with other squads to align software features, optimize designs, and fit seamlessly into the overall architecture
What this job requires:
- 4+ years of proven experience in a development team, delivering working solutions and products
- 3+ years of hands-on experience with Java and Spring Boot (we mainly work with Java 11/17/21)
- Practical knowledge of security concepts (PKI, S/MIME, OpenPGP, X.509 Certificates, PGP Keys)
Your toolbox includes:
- Java: 11/17/21
- Frameworks: Spring Boot, Spring MVC/Web, Spring Security
- Persistence: Hibernate ORM (JPA), Liquibase
- Message Brokers: NATS / RabbitMQ / Kafka
- HTTP & APIs: Apache HttpClient, REST / OpenAPI
- Testing: JUnit 5
- OS & Scripting: Linux (basic commands), Bash
- Containerization: Docker, Kubernetes
- Microservices & Monoliths: design and implementation experience
- Build Tools: Gradle
- Databases: MySQL, PostgreSQL
- Version Control: Git, GitLab / Bitbucket
-CI/CD: Jenkins
Bonus points if you:
- Know your way around Email, SMTP, Jakarta Mail, PKI, BouncyCastle
- Have strong English skills (B2 or higher)
???? If you’re looking for a role where freedom meets responsibility and your work drives real impact, this is the place to grow.