Backend Developer - Hotel and Car Integration Partner

Description

If you enjoy investigating complex logic and performance issues, designing robust APIs, working with cloud-based processing, and collaborating closely with a highly engaged engineering team, this is the place for you! Paytrack is a pioneering *scale-up* delivering outstanding results, growing at an accelerated pace within a dynamic environment that offers ample room to structure, create, test, adapt, and expand. Here, you’ll have genuine autonomy to apply your expertise, receive broad recognition, and leave a significant mark on our history—and your own professional journey. Our ambitious goals for the coming years rely heavily on the engineering we apply across our microservices ecosystem, especially regarding the stability of our financial and travel integrations. As a **Mid-Level Java Backend Developer**, you will join one of our *squads* focused on corporate travel journeys, building and evolving the solutions and logical engines powering the core of our business. ### **About the Area and the Team** The Technology and R&D team at Paytrack is the heart of our SaaS software. We don’t just build CRUD applications—we engineer highly available distributed systems that integrate complex travel policies, real-time booking workflows, payment gateways, financial back-office modules, and API-based connections with major global partners. We operate in a modern, 100% cloud-native, microservices-oriented ecosystem where technical discussions are horizontal and the pursuit of performance is constant. ### **️ Our Tech Stack** * **Backend:** Java 21 (Spring Boot and Quarkus) * **Cloud:** AWS (100% Cloud) * **Databases:** PostgreSQL and MySQL ### **What You’ll Do (Responsibilities)** In this mid-level role, you’ll take tactical ownership of coding and strengthening the architecture of our backend ecosystem: * **Development and Evolution:** Build new product features, implement architectural improvements, and directly investigate performance bottlenecks and production issues. * **Code Quality:** Write clean (Clean Code), testable, resilient, and maintainable backend code aligned with SOLID principles. * **Code Review:** Actively participate in team code reviews, providing constructive feedback while safeguarding the repository’s technical integrity and security. * **Technical Discussions and Innovation:** Contribute meaningfully to engineering decisions—proposing efficient design patterns, library selections, and query optimizations. * **Integration and Communication:** Ensure seamless integration between internal and external systems, directly engaging with support, customer service, and business teams to resolve complex challenges. * **Agile Culture:** Actively participate in team ceremonies—including *Dailys*, *Retrospectives*, *Sprint Reviews*, and engineering technical alignment rituals. ### **The Profile We’re Looking For** We seek a problem-solving professional with strong abstract logic skills and alignment with our values: * **Objectivity and Investigative Mindset:** Ability to analyze logs, debug concurrency and database errors, and propose definitive, scalable fixes. * **Ownership and Hands-On Approach:** A strong sense of ownership over deliverables, ensuring all work undergoes rigorous testing before entering the deployment pipeline. * **Proximity and Team Spirit:** Enthusiasm for debating solutions, pairing code (*pair programming*) with teammates, and co-creating collaborative outcomes. * **Embracing Change:** Resilience and agility to thrive in a fast-growing ecosystem that continuously updates its cutting-edge technologies. ### **✔️ Requirements** **Essential (What You Must Have):** * Solid hands-on experience developing backend systems using **Java** (modern versions such as Java 17 or 21), with mastery of object-oriented programming, concurrency, *collections*, *streams*, and language best practices. * Proven experience with the **Spring Boot** ecosystem (Spring Web, Spring Data, Spring Security) and high-performance modern frameworks like **Quarkus**. * Proficiency in using **Hibernate / JPA** for object-relational mapping, persistence, and access optimization. * Practical track record designing, developing, standardizing, and consuming robust **RESTful APIs**. * Consistent knowledge of relational databases (**PostgreSQL** or **MySQL**), including structured query writing and data manipulation, plus familiarity with NoSQL databases (**MongoDB** or **Redis**). * Proficiency in creating and executing automated tests (unit and integration) using **JUnit** and **Mockito**. * Solid experience working with agile methodologies (Scrum or Kanban). **Nice-to-Have (What Sets You Apart):** * Experience with distributed architectures, microservices, and mastery of design patterns (*DTO*, *Repository*, *Factory*, *Strategy*). * Familiarity with event-driven architectures and data streaming/messaging tools such as **Kafka** or **RabbitMQ**. * Knowledge of enterprise authentication and authorization protocols (**JWT**, **OAuth2**) and API security standards. * Hands-on experience with containers (**Docker**), advanced version control with **Git**, and understanding of automated **CI/CD** pipelines. * Programming language **Golang**. * **Observability and monitoring tools.** ### **What You’ll Find at Paytrack** * **Technical Leadership:** Real autonomy to propose new backend architectural paths, refactor legacy code with a performance focus, and work at the technological forefront (Java 21 + Quarkus + AWS). * **Strong Engineering Environment:** A horizontal culture where technical debate is strongly encouraged, and you’ll interact directly with a large-scale, fully cloud-native infrastructure. * **Opportunity for Real Impact:** Develop the code and logical engines that process millions in corporate transactions for the largest companies in the country. * **Inclusion and Diversity:** We’re a scale-up built on creativity and diversity. All our positions are inclusive and open to people with disabilities (PCD)—bring your uniqueness to help us build this future! ### **Ready to Pilot the Logical Engine of One of the Country’s Largest Corporate Software Platforms?** If your code is sharp, you’re focused on database performance, and you want to accelerate your technical career in the SaaS market, you belong with us. **Apply now and make history at Paytrack!**