Developer Fulstack Java / JS Freelance M/F

Transatel is a leading Mobile Virtual Network Operators (MVNO) enabler and a global cellular IoT connectivity solutions provider. How about connecting the world together, beyond borders?

Transatel also operates its own retail connectivity mobile data service branded as Ubigi. Thanks to the eSIM technology, Ubigi is redefining the way travelers stay connected to the Internet abroad by offering cost-effective data plans in over 200 destinations worldwide.

Your mission

• As a member of the Information Systems team, you will join our software development group, which consists of 70 professionals, including developers, Agile Scrum Masters, and testers.
• Specifically, you will be part of the squad responsible for developing our platforms. These platforms leverage the latest in Java 21 and Spring Boot, utilizing microservices
• architecture and REST APIs, all within an environment where maintenance and reliability are paramount.
• We employ Agile Scrum methodologies to foster strong collaboration between technical and business teams, while adhering to industry best practices such as pair programming,
• open collaborative spaces, continuous integration, and Test-Driven Development (TDD)

Your Profile:

• You have a university education related to Software Engineering, Information Systems or Computer Science.
• You have at least 6 years of experience.
• English and Polish fluent
• You agree to come in an office in Paris 2 time per year and to meet team at Warsaw 1 time per month.

Tech requirements:

• Proved, solid knowledge of Java language (java 21)
• Frameworks and ORM: Spring (Boot, Core, JDBC, Security), and Hibernate
• Good knowledge on microservices architecture (Outh2, Service discovery, Distributed tracking, …)
• Unit testing (jUnit), integration and performance testing
• Experience with concurrent programming and distributed systems
• Proficiency in SQL and relational DBs (MS SQL/MySQL)
• Good understanding of REST API (JSON/XML), Open API specification, HTTP protocol in general
• Nice to have (optional):
• Experience with JavaScript (React, Angular)
• Knowledges in No-SQL (Elasticsearch, Couchbase)
• Experience with Kubernetes and Cloud
• Experience with mobile cross plateform application developement
• English language