Job Summary: Work on the development and maintenance of Java applications in a highly critical and impactful environment, contributing to the evolution of strategic financial sector products. Key Highlights: 1. Working within an internal squad at a national credit cooperative 2. Development of strategic products: Pix, Internet Banking, Collections 3. Environment with high technological maturity and modern architecture **At Premiersoft, we turn challenges into real solutions!** With over a decade of experience in development, we are driven by a clear purpose: **creating technology experiences that propel businesses** and accelerate our clients’ transformation. Our team, composed of more than 200 **\#Heroes**, combines technical excellence with our core DNA: **Team Player, Growth Driven, and Problem Solver**. We thrive on challenges, are guided by innovation, and are committed to **delivering high-impact solutions**, every single day. **About the opportunity:** You will work with one of the largest credit cooperatives in the country, nationally recognized for its solidity and innovation within the cooperative financial system. You will join internal squads responsible for strategic products such as **Pix, Internet Banking, and Collections solutions**, operating in a highly critical environment with direct business impact and strong technological maturity. This is a position for those seeking to work with modern architecture, sound engineering practices, and real financial sector challenges—contributing to the continuous evolution of products serving thousands of cooperative members across Brazil. **Your responsibilities will include:** * Developing and maintaining **Java applications** within squads supporting critical financial system products; * Implementing and enhancing features related to **Pix, Internet Banking, and Collections solutions**; * Developing **REST APIs using JAX\-RS and Spring Framework**; * Working with **Hexagonal Architecture**, applying **Object-Oriented Programming and Design Patterns**; * Handling **messaging (JMS/ActiveMQ) and system integrations**; * Implementing business logic focused on **performance, security, and reliability**; * Performing database queries and integrations using **Spring JDBC and transaction control**; * Contributing to technical improvements, refactorings, and architectural evolution of applications; * Actively participating in agile ceremonies, collaborating with the team to define technical solutions. **Requirements:** * **Strong hands-on experience with Java and Spring Boot**; * Practical experience with **Hexagonal Architecture**; * Knowledge of **REST APIs (JAX\-RS)**; * Experience with **messaging (JMS / ActiveMQ)**; * Proficiency in **Spring Framework (Transaction and JDBC)**; * Solid understanding of **Object-Oriented Programming and Design Patterns**; * Experience with **ElasticSearch**; * Completed undergraduate degree in **Computer Science, Software Engineering, Systems Analysis, or related fields**. **Nice-to-have qualifications:** * Knowledge of **JWT (JSON Web Token)** for authentication and authorization; * Experience with **Swagger / OpenAPI** for API documentation and definition; * Prior experience in the **financial sector or credit cooperatives**; * Experience working in **high-criticality environments and high-volume transactional systems**. On-site hiring in Londrina, PR. **What we offer:** * A **collaborative** environment with **continuous knowledge sharing**; * An open culture embracing **innovation, ideas, and proactive ownership**; * Use of **cutting-edge technologies** and industry best practices; * Focus on **technical excellence** and **real-world impact** in deliverables; * Ongoing encouragement of **learning and professional development**. **Our benefits:** * **Flexible benefits card** via Flash **\-** meals, mobility, wellness, and more; * **Health insurance plan** (Unimed); * Partnership with a **mental health clinic**; * **TotalPass:** access to gyms, studios, and wellness activities; * Gifts via Flash **\-** **birthday gift** and **time-in-company gift**; * Referral bonus **\- R$ 2\.000,00 per hire**; * Continuous development through **IDPs (Individual Development Plans), feedback, and certification support**; * **Free English classes:** preparing you for international opportunities. See what it’s like to be part of the Premiersoft team Learn more about us Visit our headquarters Communication throughout the selection process occurs via email or WhatsApp. To avoid missing any updates, please add the domain **@premiersoft.net** to your list of trusted senders and monitor both your inbox and spam folder.