Senior Backend Engineer

About the company

OTE Group is the largest technology company in Greece and a member of the Deutsche Telekom Group. Through technology and innovation, we work to create a better world for all.

Diversity, inclusion and equality are at the core of our corporate culture.

This is the reason why we create an equal working environment in which our people can excel for their expertise, professional experience, conscientiousness, and responsibility.

Become part of our network and let’s create your future together!

 

 

About the role

As a Senior Backend Engineer at OTE, you will be part of teams building and evolving large-scale, mission-critical backend platforms that support a very large customer base and complex business processes.

You will operate in an environment with rapidly changing business and technological challenges, where engineering quality, scalability, and reliability are critical. The systems you work on are not only used locally, but are also shared and evolved across the DT Group, contributing to solutions consumed by multiple NatCos.

We are looking for engineers who enjoy ownership, technical depth, and collaboration, and who want to shape platforms used at national scale and evolved at a global DT Group level, following shared engineering principles and standards across NatCos.

 

Key responsibilities

·        Take ownership of the design, implementation, and evolution of backend services across the full application lifecycle

·        Contribute actively to architecture and technical decision-making in a distributed, microservices-based environment

·        Design and build highly scalable, resilient Java services supporting high traffic and data volumes

·        Define, implement, and evolve RESTful APIs and integration contracts used across multiple systems

·        Work with event-driven and asynchronous architectures

·        Build reusable components and shared libraries to support long-term platform evolution

·        Participate in technical discussions, design reviews, and code reviews

·        Collaborate closely with product, frontend, DevOps, and business teams

·        Identify performance, scalability, and reliability challenges and lead their resolution

·        Contribute to engineering standards, best practices, and guidelines

·        Support and mentor other engineers through knowledge sharing and technical feedback

 

Required Skills

·        Strong experience building backend systems in Java

·        Proven experience with microservices in production

·        Solid understanding of distributed systems and architectural trade-offs

·        Experience with containerized and cloud-native environments

·        Ability to balance business needs with technical excellence

·        Comfortable taking ownership and contributing to technical direction

·        Strong communication and collaboration skills

 

Preferred Skills

·        Experience with Quarkus/Springboot Native

·        Experience with NoSQL databases

·        Exposure to telecom-grade or large-scale systems

·        Interest in platform or domain-driven design

 

What we offer

At OTE Group, we recognize and reward every effort without discrimination, through a wide range of benefits and programs for our people:

 

 

Your benefits

• Competitive remuneration package
• Cafeteria benefits
• Company Mobile & Device Subsidies
• Fixed telephony, Internet & COSMOTE TV Packages
• Modern working environment, working laptop only

 

Your balance

• Flexible working arrangements
• Private insurance for employees and their family members
• Family Care: Maternity, childbirth and parental leave to care for children, above the minimum required by law. Provided equally to working mothers & fathers

 

Your wellness

• Health, safety & wellness programs: Exercise & Wellness Platform “The Coach”
• Wellness and sports activities, dietician appointments, medical check-ups, etc.
• OTE Group psychological service

 

Your development

We foster an empowering culture, encouraging our people to seize every opportunity to learn with the goal to achieve personal development, through:

• Unlimited access to digital learning platforms Percipio & Coursera
• Various f2f custom made learning academies
• Talent & rotation programs

 

Your On-boarding

• Virtual new hire pre-boarding & onboarding program
• A buddy to support you in the first months working with us