I am a results-driven Java Software Developer with over 4 years of experience building cloud-native microservices for high-scale telecom platforms. I have a proven track record of developing green-field features and refactoring legacy code using modern Java technologies, always aiming to write clean, testable code and support production systems effectively. I enjoy collaborating in Agile/Scrum teams to deliver high-quality software on schedule and have contributed to significant projects that impacted tens of thousands of users weekly. In my current role, I design and deliver microservices, define API specifications, and improve testing strategies to raise product quality. I am also involved in technical hiring, helping to build and grow strong development teams. I am passionate about continuous learning and have completed certifications in Apache Kafka and Kotlin to enhance my skill set further.

Dmitrii Maslov

I am a results-driven Java Software Developer with over 4 years of experience building cloud-native microservices for high-scale telecom platforms. I have a proven track record of developing green-field features and refactoring legacy code using modern Java technologies, always aiming to write clean, testable code and support production systems effectively. I enjoy collaborating in Agile/Scrum teams to deliver high-quality software on schedule and have contributed to significant projects that impacted tens of thousands of users weekly. In my current role, I design and deliver microservices, define API specifications, and improve testing strategies to raise product quality. I am also involved in technical hiring, helping to build and grow strong development teams. I am passionate about continuous learning and have completed certifications in Apache Kafka and Kotlin to enhance my skill set further.

Available to hire

I am a results-driven Java Software Developer with over 4 years of experience building cloud-native microservices for high-scale telecom platforms. I have a proven track record of developing green-field features and refactoring legacy code using modern Java technologies, always aiming to write clean, testable code and support production systems effectively. I enjoy collaborating in Agile/Scrum teams to deliver high-quality software on schedule and have contributed to significant projects that impacted tens of thousands of users weekly.

In my current role, I design and deliver microservices, define API specifications, and improve testing strategies to raise product quality. I am also involved in technical hiring, helping to build and grow strong development teams. I am passionate about continuous learning and have completed certifications in Apache Kafka and Kotlin to enhance my skill set further.

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Experience Level

Expert
Expert
Expert
Expert
Intermediate
Intermediate

Language

Russian
Fluent
English
Advanced
Spanish; Castilian
Beginner

Work Experience

Middle → Senior Java Developer (Gigabit Project) at T-Systems Iberia
March 1, 2023 - Present
Designed and delivered 6 microservices using Java 17 and Spring Boot 3 to support Deutsche Telekom's fiber rollout, enabling over 10,000 new subscribers weekly. Defined OpenAPI 3.0 specifications, auto-generated clients, and ensured backward-compatible API evolution. Introduced Testcontainers-based integration tests, increasing overall test coverage from 60% to 85%. Conducted technical interviews for developer candidates, evaluating their skills and cultural fit to support hiring decisions.
Junior → Middle Java Developer at Deutsche Telekom
March 1, 2023 - August 22, 2025
Built customer-facing REST APIs used by over one million broadband customers, utilizing Java 11 through 17 and Spring Boot. Implemented the Transactional Outbox pattern with Kafka, eliminating cross-service data loss incidents. Migrated legacy nightly jobs to Spring Batch, which reduced runtime by 40% and decreased maintenance efforts considerably.

Education

Specialist Degree of Mining Engineering at Mining University, Saint-Petersburg
January 1, 2005 - January 1, 2010

Qualifications

Apache Kafka Series : ‹packt›
January 1, 2024 - August 22, 2025
Kotlin for Java Developers, by JetBrains
January 1, 2023 - August 22, 2025

Industry Experience

Telecommunications, Software & Internet

Experience Level

Expert
Expert
Expert
Expert
Intermediate
Intermediate