Job Summary: We are looking for software developers passionate about technology to work on the development and evolution of REST APIs, system integrations, and database optimization in a collaborative environment. Key Highlights: 1. 100% remote work and flexible hours 2. Developing REST APIs with Spring Boot (Java) 3. Dynamic, collaborative environment focused on innovation **We specialize in developing sales software for the wholesale and distribution sectors.** With a portfolio of over 10 solutions, we impact companies across Brazil through solutions focused on sales, team management, artificial intelligence, e-commerce, digital payments, and route planning. Since 2014, we have grown with a clear vision: using technology to transform people's lives. What sets us apart is not only what we do, but how we do it. “Our ION Way of Being” defines who we are: we cultivate a light-hearted, dynamic, and collaborative environment where innovation happens authentically. One of the great secrets of our success lies in our team of IONizers—talented individuals who believe in the impact of technology and grow alongside us every day. Are you passionate about technology and innovation? Then join us to build this story together! * Corporate Website: https://www.ionsistemas.com.br/ * Instagram: https://bit.ly/InstagramION * LinkedIn: https://bit.ly/linkedinION * YouTube: https://bit.ly/youtubeION * Facebook: https://bit.ly/facebookion **Why Become an IONizer?** At ION Sistemas, we are IONizers—partners on a journey of digital transformation and success. Our commitment goes beyond delivering solutions; we seek to impact results and processes through innovation and efficiency. Being an IONizer means being part of a motivated team, empowered to innovate and create within a collaborative and passionate environment. Driven by enthusiasm and continuous learning, we strive to deliver outstanding service and drive business growth. Join us to build the future with creativity and impact! Your Day-to-Day Responsibilities: * Develop and evolve REST APIs using Spring Boot (Java); * Implement and maintain integrations between internal and external systems; * Model and optimize queries in Oracle and MySQL databases; * Conduct technical analysis of requirements and participate in refinement sessions with the Product team; * Create and maintain unit tests; * Apply best development practices (Clean Code, SOLID, and architectural patterns); * Investigate and resolve technical incidents in staging and production environments; * Actively participate in Agile ceremonies (Planning, Daily, Review, and Retrospective); * Collaborate continuously with Development, Product, and Support teams to ensure delivery quality and stability. **Requirements:** * Minimum 2 years of experience in software development; * Experience developing APIs using Spring Boot (Java); * Knowledge of REST architecture and system integration; * Experience with Oracle and MySQL databases; * Experience with Agile methodologies (Scrum and/or Kanban); * Proficiency with Git version control; * Application of best development practices (Clean Code and SOLID). **Nice-to-Have Qualifications:** * Experience with microservices architecture; * Experience developing APIs using .NET (C#); * Frontend interface development using React and JavaScript (ES6+), integrated with ecosystem APIs; * Knowledge of authentication and authorization (JWT, OAuth); * Experience with ERP or sales/business management systems; * Experience working with high-volume data environments and complex integrations; * Experience with automated testing and continuous integration (CI/CD). **What We Offer to Help You Excel at Your Work:** * 100% remote work; * Flexible schedule with 40 weekly working hours; * Birthday day-off, including a special iFood benefit! * Meal or food allowance (applicable even during vacation); * 100% company-covered health and dental insurance; * Remote work allowance: R$100.00/month; * Home office setup allowance (to enhance your home workspace); * Reimbursement for English, technology, and related courses; * Araújo Pharmacy Network agreement; * Gympass; * MetLife Life Insurance; * Psychological support; * Extended maternity and paternity leave.