We are the leading telco company in Slovakia, currently driving one of the most significant IT transformation programs in recent years. We're looking for a Senior Backend Developer to lead the technical execution of our CRM domain transformation – one of the most complex and critical initiatives in our modernization journey.
You'll be hands-on in decomposing and replacing our legacy Siebel CRM with modern microservices architecture, building the backbone systems that power our customer operations, sales processes, and service delivery.
This is a high-impact individual contributor role for someone who excels at complex system refactoring, data migration, and building scalable backend services in enterprise environments.
What you'll be doing
- Leading hands-on development in the CRM domain transformation – decomposing monolithic Siebel into domain-driven microservices
- Building core backend services for:
- Customer data management and customer 360° view
- Order management and fulfillment orchestration
- Product catalog and configuration services
- Billing integration and account management
- Sales and service process automation
- Developing robust data migration strategies for transitioning from legacy systems
- Implementing event-driven architecture using Kafka for real-time synchronization between CRM domains and downstream systems
- Building high-performance APIs that handle millions of daily transactions across multiple consumer systems
- Ensuring data consistency and integrity across distributed services during the transition period where legacy and new systems coexist
- Collaborating with architects, business analysts, and domain experts to understand complex telco business processes and translate them into technical solutions
- Optimizing system performance, managing database schemas, and ensuring services can scale to handle peak loads
What we're looking for
- Expert-level Java and Spring Boot development skills with proven track record in enterprise backend systems
- Deep experience with CRM systems transformation, ideally with knowledge of Siebel, Salesforce, or similar platforms
- Strong expertise in microservices architecture, domain-driven design, and distributed systems patterns
- Solid experience with relational databases (Oracle, PostgreSQL), data modeling, and query optimization
- Hands-on experience with Kafka or similar event streaming platforms for system integration
- Proven track record in legacy system modernization and large-scale data migrations
- Experience with containerization (Docker, Kubernetes) and CI/CD pipelines
- Understanding of telco domain (customer lifecycle, order-to-activation, billing) is a significant advantage
- Strong problem-solving skills and ability to work with complex, ambiguous requirements
- Excellent communication skills to work effectively with both technical teams and business stakeholders
- Self-driven mindset with ability to take ownership of large technical initiatives
Nice to have
- Experience with NoSQL databases for specific use cases
- Familiarity with observability and monitoring tools (Prometheus, Grafana, ELK stack)
- Experience with performance testing and optimization tools
- Knowledge of SAFe, Scrum, or other agile methodologies in large-scale environments
- Experience with API gateway patterns and API management platforms
- Background in DevOps practices and infrastructure as code
- Previous experience mentoring junior developers or leading technical initiatives
- Experience with caching strategies and distributed cache solutions
- Knowledge of contract testing and consumer-driven contracts
We offer our people the best
- Smartphone: Choose your phone and get a compensation of up to 900 € every 3 years.
- Employee tariff: Use unlimited data, call and text for lower prices for private and business purposes.
- Yearly bonus: You can get a bonus of up to 15% of your annual fixed salary each year depending on the company’s success.
- Telekom discounts: Enjoy the most of the lower prices of our products and services for your family and friends.
- Partner discounts: Enjoy lower prices of products and services with our partners.
- Flexible hours: Adapt your work to your needs thanks to the home-office option (according to the agreement with the manager).
- Shares program Shares2You: Become a shareholder of the Deutsche Telekom Group and take advantage of the associated benefits.
- Rest and recreation: Relax with 5 extra days off.
- MultiSport: Sport and relax with your loved ones thanks to the discounted MultiSport card.
- Sick pay: If you are on sick leave for max. 10 days, you can count on an income of 80% of the daily assessment basis.
- uLekára.sk: Take care of your health with free online prevention and consultation with medical specialists for you and your family.
- Healthcare: Take care of your wellbeing with high-quality care for a discounted price with our contractual facility.
- Education and development: Broaden your horizons with our internal T-Univerzita offering a wide range of courses.
- Cafeteria: Choose from a wide range of benefits worth up to 500 € per year - sports and cultural services, health and beauty, holidays or language courses.
- Life crisis support: Is life testing you? We will support you with one-off financial support.
- Psychological consultations: Are you having troubles in your private or professional life? Share your burden anonymously via phone or online.
- Meal contribution: Enjoy a delicious meal with a work-day allowance of 6.60 €.
- Sabbatical: Sometimes we all need to switch off. That’s why, after working for 2 years and upon agreement with your manager, you can take 1 month off to do whatever you need.
- Recreational allowance: Have you been with us for 2 years? A recreational allowance is in your pocket.
- Pension allowance: Get ready for your retirement with a pension allowance after 3 months with us.
Everyone is welcome to join us
Our employees feel that they have equal employment and career development opportunities with us, regardless of age, gender and gender identity, sexual orientation, physical and mental ability, nationality, social and ethnic origin, political views, religion and world view. This makes us very happy. We are committed to continuous improvement and to creating a safe working environment for all.
What awaits you
- Has the job offer captured your interest? Fill in the application form and let us know about yourself.
- We will assess the information you send us and will get back to you under any circumstances.
- We will contact the chosen applicants and specify the details.
- A job interview is a two-way opportunity to get to know each other better.
- We will inform you about the result of the interview as soon as possible. Successful candidates will receive a job offer.
