Software Engineer (Java)

Adtran is looking for a Software Engineer to join the Mosaic Network Controller team.
The role involves designing, developing, and maintaining both new and existing features in the Mosaic Network Controller, as well as creating and executing developer‑level tests.

Our system manages WDM Optical, Ethernet, and Synchronization & Timing networks, supporting our customers in operating their solutions efficiently and reliably. Mosaic is used globally by Tier 1 Network Service Providers, Regional Operators, Data Center Providers, and Enterprises that prioritize security, performance, speed, and high availability.

Duties and Responsibilities

• Participate in the full lifecycle of a Java application: design, implementation, troubleshooting

• Develop and execute unit tests and resolve reported defects

• Break down tasks across the software construction process

• Perform code reviews for team members

• Document the development process and system components

• Design, implement, and maintain automated tests

• Design and execute functional tests

• Document and track defects using test and development management systems

Technology Stack

• Java, JavaScript

• Red Hat Enterprise Linux

• Docker, Kafka

• GitHub, TeamCity, IntelliJ IDEA

Qualifications

• Bachelor’s degree in Computer Science, Computer Engineering, Software Engineering, Information Science, Electrical Engineering, or equivalent

• Minimum 2 years of practical experience in developing applications using Java

• Hands-on experience with unit and automated testing frameworks such as JUnit or Mockito

• Familiarity with version control systems (Git) and CI/CD tools like TeamCity or Jenkins

• Basic knowledge of containerization technologies, preferably Docker

• Working knowledge of Linux operating systems, especially Red Hat Enterprise Linux

• Good written and spoken English

• Strong willingness and ability to learn

• Solid analytical and problem‑solving skills

• Team‑oriented mindset; flexible and open‑minded

• Familiarity with Linux OS (especially RHEL‑based)

• Understanding of the SDLC process; experience in software R&D is a plus

Compensation and Benefits

• Stable employment based on an employment contract (turnover rate below 4%)

• 1 additional vacation day for all employees, plus 1 extra after 10 years with the company

• Flexible working hours and hybrid work model (presence in the Gdynia office 3 days a week)

• English lessons during working hours

• Internal training program supporting development needs

• Paid employee referral program

• Multisport Card

• 3% employer contribution to PPK

• Private healthcare at Medicover (extended package available for employees and family members)

• Strong, collaborative, and friendly work culture

• Access to sports activities and events

• Modern office with a well‑equipped gym and playroom, located near SKM/PKM stations