Mid-Level Java Developer | On-site | Londrina/PR

Description

Job Summary: Join us in developing and maintaining Java applications within squads supporting critical financial system products, contributing to continuous product evolution. Key Highlights: 1. Working in a highly critical environment with strong technological maturity 2. Development using modern architecture and engineering best practices 3. A culture open to innovation, ideas, and initiative **At Premiersoft, we turn challenges into real solutions!** With over a decade of experience in software development, we are driven by a clear purpose: **creating technology experiences that accelerate business growth** and drive our clients’ digital transformation. Our team—comprising over 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—a national benchmark for solidity and innovation in the cooperative financial system. You will join internal squads responsible for strategic products such as **Pix, Internet Banking, and Billing Solutions**, operating in a highly critical environment with direct business impact and strong technological maturity. This is an ideal role for professionals seeking hands-on experience with modern architecture, engineering best practices, and real-world 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 evolving features related to **Pix, Internet Banking, and Billing Solutions**; * Developing **REST APIs using JAX\-RS and Spring Framework**; * Working with **Hexagonal Architecture**, applying **Object-Oriented principles and Design Patterns**; * Handling **messaging (JMS/ActiveMQ) and system integrations**; * Implementing business logic with emphasis on **performance, security, and reliability**; * Performing database queries and integrations using **Spring JDBC and transaction control**; * Contributing to technical improvements, refactoring, and architectural evolution of applications; * Actively participating in Agile ceremonies and collaborating with the team to define technical solutions. **Required Qualifications:** * **Solid 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 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**; * A culture open to **innovation, ideas, and initiative**; * 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 **\-** covering 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 **Personal Development Plans (PDI), feedback sessions, 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 your inbox and spam folder.