Lead Software Engineer - N4F - (REF5331H)

Job Description:

As Hungary's most attractive employer in 2025 (according to Randstad's representative survey), Deutsche Telekom IT Solutions is a subsidiary of the Deutsche Telekom Group. The company provides a wide portfolio of IT and telecommunications services with more than 5300 employees. We have hundreds of large customers, corporations in Germany and in other European countries. DT-ITS recieved the Best in Educational Cooperation award from HIPA in 2019, acknowledged as the the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team.

We're looking for a strong Senior/Lead Java Engineer to help build and modernize Deutsche Telekom's network management and provisioning ecosystem.
This is not a typical enterprise CRUD environment!
Our systems support large-scale telco infrastructure and services including:
* 5G rollout
* FTTH / FTTC broadband provisioning
* IP Transit services
* distributed network orchestration
* machine-to-machine communication workflows
You'll work on backend platforms where scalability, resilience, distributed communication, and reliability are real engineering challenges - not just buzzwords.
The role focuses on designing and developing modern Java microservices for provisioning, orchestration, and complex system integrations in a mission-critical telco environment.
What you'll work on:
* Designing and developing Java-based backend microservices
* Building scalable distributed systems
* REST and event-driven communication
* Network provisioning and orchestration workflows
* PostgreSQL modeling and optimization
* CI/CD pipelines and containerized environments
* Kubernetes / Docker infrastructure
* Integration of complex business and network management systems
* Technical mentoring and architecture reviews
* Helping modernize legacy telco platforms into modern distributed architectures
Tech Stack:
* Java
* Microservices
* REST APIs
* PostgreSQL
* Docker
* Kubernetes
* CI/CD
* Event-driven architecture

Candidate Requirements:

* Strong experience in Java development and microservice architectures
* Expertise in RESTful API design, and event-driven communication (Stargate, Horizon)
* Solid experience with PostgreSQL (data modeling, queries, optimization)
* Ability to design and review software architecture for distributed systems
* Familiarity with CI/CD pipelines and containerization (Docker, Kubernetes)
* Strong analytical and conceptual skills for system design
* Leadership qualities and experience in guiding development teams
* Willingness and capability to integrate AI solutions for process optimization and workflow improvement