Fullstack Developer (Mid-level)

Description

Job Summary: We are looking for a Mid-level Fullstack Developer to join our Dev-Digital Security team, focused on developing features, fixing bugs, and actively participating in the full software project lifecycle. Key Highlights: 1. Opportunity for growth in a challenging environment 2. Focus on continuous technical and personal development 3. Work environment that supports diversity and inclusion **Published at October 2025** Campinas/SP Work model Remote Contract model CLT Person with disability **We are seeking a Mid-level Fullstack Developer to join our Dev-Digital Security team to:** Develop new features and fix bugs, following software development best practices* ; Participate in the full software project development lifecycle* ; Actively assist in refining technical requirements* ; Participate in agile development ceremonies* ; Perform development testing and support the QA team in validating deliverables* ; Support Operations, Projects, and Product teams with technical needs* ; Support customers with questions related to integration with our products* . **We believe it is important that you have had some prior experience and possess the following knowledge:** Experience with Java 17+, Spring Boot, REST APIs, Microservices architecture, CI/CD* ; Experience with software development planning and estimation* ; Knowledge of Docker and orchestrators* ; Knowledge of event-driven architecture and messaging services* ; Knowledge of HTML5, CSS3, JavaScript, TypeScript, React* ; Knowledge of frontend security* ; Knowledge of responsiveness* ; Knowledge of code versioning processes and CI/CD practices (Git)* ; Knowledge of software development/engineering processes, from conception to delivery* ; Knowledge of major Design Patterns* ; Knowledge of development best practices: SOLID, K.I.S.S., Clean Code* ; Knowledge of databases (SQL, NoSQL)* ; Knowledge of unit testing* ; Proficiency in ensuring the quality and proper functioning of developed solutions as a whole* . **It will be a strong advantage if you have:** Knowledge of API performance analysis and optimization* ; Intermediate English* ; Knowledge of payment-related products or concepts* . **What do we offer?** HST is a GPTW-certified company! We offer the **opportunity to grow in a challenging environment**, where each individual’s contribution corresponds directly to **their own willingness to grow**! CLT employment contracts* ; Flexible working hours* ; Opportunity for growth through continuous development, both technical and personal* ; Leadership development programs for emerging leaders* ; 10% of monthly working hours can be dedicated to learning something new* ; Birthday day-off* ; Home office allowance* ; Extended maternity and paternity leave* ; Profit and Results Sharing Program* ; WellHub (formerly Gympass)* ; Health insurance* ; Dental insurance* ; Meal/Voucher allowance* ; Transportation allowance or parking* ; Childcare assistance* ; Life insurance* . We value a healthy work environment that helps people grow and feel welcomed, free, authentic, and comfortable showcasing their skills! **We support diversity and do not tolerate any form of discrimination!** \#HSTcardtechnology \#orgulhodepertencer \#vempraHST ### **About Us** We solve the most complex challenges, and since our founding, our mission has been to make electronic transactions more secure. Our solutions are present in over 20 countries, and among our clients are the 8 largest banks in Brazil and the top 20 banks in Latin America! Behind all our achievements is our Team — over 200 people involved in developing our solutions. People who are inquisitive, curious, creative, proactive, collaborative, and open to new experiences. We value a work environment that fosters personal and professional growth, where everyone feels welcomed, authentic, and comfortable exploring their abilities! We believe diversity drives innovation in our solutions. Therefore, at HST, we have the Diversifica Collective — a forum for discussing diversity topics and strategies aimed at making our organization more plural and inclusive! We are pioneers in the digital transformation of payment methods — we are HST!