Maintenance Engineer - Rating Development Squad @ T-Mobile Polska in T-Mobile Polska

We are looking for people who have experience and like to maintain systems, monitor their behavior and detect anomalies, find errors, analyze the causes of these errors and correct their effects. We provide interesting and developing work with a real-time rating system serving millions of T-Mobile network users. Hybrid work (3 days a week in the office in Warsaw, Marynarska 12)

HR-2752

• Several years of experience in maintaining systems and performing at least 3 of the above activities listed in the scope of duties
• Ability to analyze the causes of errors in logs, databases and in data issued REST API services (json, XML).
• Ability to repair the effects of errors (database changes, repair scripts)
• Analytical skills, allowing for quick understanding of business processes and technical aspects of the system
• Willingness to learn learning complex business and technical logic
• Ability to introduce improvements and automation to detect, analyze and correct errors faster
• Courage to act, attitude to learning from mistakes
• Communication skills, good cooperation within the team and with other teams.
• At least basic knowledge of one of the programming languages ​​(C, C++, C#, Java, Go Lang or related)

The following skills will be an additional advantage, some of them will be taught: < /b>

• Knowledge of Linux and the ability to write scripts
• Knowledge of the Go Lang language
• Knowledge of relational (e.g. PostgreSQL) and non-relational databases (e.g. . MongoDb, Redis)
• Knowledge of queuing systems (kafka, artemis or others)
• Knowledge of network protocols (sftp, tcp/ip)
• Knowledge of tools: Git , Gitlab, Jenkins, Docker, Jira, Kibana
• Knowledge of the rating and telecommunications area
• Telecommunications protocols (Diameter, others), 3GPP OCS/PCRF standards
• Experience in maintaining backend systems or other systems with large volumes of data and transactions

We are looking for people who have experience and like to maintain systems, monitor their behavior and detect anomalies, search for errors, analyze the causes of these errors and improve their effects. We provide interesting and developing work with a real-time rating system serving millions of T-Mobile network users. Hybrid work (3 days a week in the office in Warsaw, Marynarska 12)

HR-2752

,[Monitoring system operation, detecting anomalies, reporting errors to teams, coordination of error repairs, Responding to alarms and appropriate tuning of these alarms so that they are triggered in desired situations, Support for handling reports of technical problems from customers, analysis of logs and records in databases, Support for solving errors detected in system and E2E tests, Preparing and launching data fixes mass corrections of data in the system and cooperation with teams that prepare scripts for data fixes, testing and launching them, Standby - 7 days once every 6 weeks, responding to calls related toane with alarms, introducing temporary workarounds in the system until the root cause of the problem is resolved. , Assisting in planned work to determine whether the system is working properly after the upgrade (max. 2 times a month, most often 1 time a month)]
Requirements: REST API, XML, C, C++, Java, Linux, PostgreSQL, Redis, MongoDB, Kafka, SFTP, Git, GitLab, Docker, Jenkins, Kibana
Additionally: Private healthcare, Sport subscription, Free coffee, Mobile phone, Free parking, No dress code.