Summary: We are seeking a Java developer responsible for designing, building, and maintaining efficient, reusable, and reliable Java applications within a collaborative team environment. Highlights: 1. Design, build, and maintain efficient, reusable, and reliable Java code 2. Identify bottlenecks and bugs, and devise solutions to these problems 3. Commitment to collaborative problem solving and product quality remote type Hybrid locations Porto \- Portugal time type Full time posted on Posted Today time left to apply End Date: April 30, 2026 (30\+ days left to apply) job requisition id JR11112 About Us: Planet is a leading technology company transforming payments by putting customer experience first. We offer integrated solutions that include payment processing, VAT refunds, dynamic currency conversion, and management services for merchants in the Retail and Hospitality sectors worldwide. In recent years, we have experienced significant growth, expanding our services and global presence. With strong private equity investors, Advent International and Eurazeo, we have the financial capital and expertise to grow our capabilities and reach through acquisitions. Our mission is to create a world of connected commerce where payments are simple, secure, and seamless, enabling our partners to deliver exceptional experiences to their customers. Role Overview: We are looking for a Java developer responsible for building Java applications. This includes anything between complex groups of back\-end services and API’s. Your primary responsibility will be to design and develop these applications, and to coordinate with the rest of the team working on different layers of the infrastructure. Thus, a commitment to collaborative problem solving, sophisticated design, and product quality is essential. What you will do:* Translate application storyboards and use cases into functional applications * Design, build, and maintain efficient, reusable, and reliable Java code * Ensure the best possible performance, quality, and responsiveness of the applications * Identify bottlenecks and bugs, and devise solutions to these problems * Help maintain code quality, organization, and automatization Who you are:* Proficient in Java, with a good knowledge of its ecosystems * Solid understanding of object\-oriented programming * Familiar with various design and architectural patterns * Skill for writing reusable Java libraries * Knowledge of concurrency patterns in Java * Familiarity with concepts of MVC, JDBC, and RESTful * Experience with AWS, Spring, Redis, SQL and ElasticSearch is a plus * Knack for writing clean, readable Java code * Experience with both external and embedded databases * Understanding fundamental design principles behind a scalable application * Basic understanding of the class loading mechanism in Java * Creating database schemas that represent and support business processes * Basic understanding of JVM, its limitations, weaknesses, and workarounds * Implementing automated testing platforms and unit tests * Proficient understanding of code versioning tools, such as Git * Familiarity with build tools such as Ant, Maven, and Gradle * Familiarity with continuous integration * Experience within Hospitality domain is a plus Why Planet : Planet is an equal opportunity employer where diversity is valued, and all employment is decided based on qualifications, merit, and business need. Come and grow your career in the most exciting, fast paced technology market, with a business that delivers feel\-good connected commerce. We would love to hear from you – Apply now. At Planet, we embrace a hybrid work model, with three days a week in the office. Reasonable accommodations may be made in order to allow for an individual to perform the essential functions of this role successfully. About Us Company Background Planet provides integrated software, payment and technology solutions for its customers in the Hospitality and Retail sectors and worldwide via a network of global Financial Services Partners. Founded over 35 years ago, we have evolved our services, delivering an innovative digital commerce platform that puts customer experience first. With headquarters in London and around 3,000 expert employees located across six continents we serve customers in over 120 markets.