Fullstack Developer (Mid-Level)

Description

Job Summary: We are seeking a Mid-Level Fullstack Developer to join our Dev-Digital Security team to develop features, fix bugs, and participate in the complete software development lifecycle. Key Highlights: 1. Opportunity for growth in a challenging environment 2. Work environment that supports personal and professional development 3. Support for diversity and inclusion **Published at October 2025** Campinas/SP Work model Remote Contract model CLT Person with disability **We are looking for 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 complete software development lifecycle* ; Actively assist in refining technical requirements* ; Participate in ceremonies within an agile development model* ; Perform development tests and support the QA team in validating deliverables* ; Support Operations, Projects, and Products teams with technical needs* ; Support customers with questions related to integration with our products* . **We believe it is important that you have experience in and knowledge of the following:** 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 functionality of developed solutions as a whole* . **It would be a strong plus 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 growth is directly proportional to **their own willingness to grow**! CLT hiring model* ; Flexible working hours* ; Opportunity for growth through continuous technical and personal development* ; 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 fosters personal growth and makes people 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, have been committed to making 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 in Latin America! Behind all our achievements is our Team — over 200 people involved in developing our solutions. People who are curious, questioning, creative, proactive, collaborative, and open to new experiences. We value a work environment that promotes personal and professional growth, where everyone feels welcomed, authentic, and comfortable exploring their abilities! We believe diversity drives innovation in our solutions. That’s why HST has the Diversifica Collective — a forum for discussing diversity topics and strategies, aiming to make our organization more plural and inclusive! We are pioneers in the digital transformation of payment methods — we are HST!