Java Backend Engineer - ATS Development
FitNext Co.
- São Paulo - SP
- US$ 4.000-5.000 por mês
- Permanente
- Período integral
Employment Type: Full-timeSalary: $4,000 – $5,000 per monthAbout the Role
We are seeking a skilled Java Backend Engineer to join our team and develop our Applicant Tracking System (ATS) integrated with REST APIs and FIX APIs. You will collaborate closely with product managers, architects, and front-end engineers to design, build, and optimize scalable, high-performance backend services.Key ResponsibilitiesDesign and implement backend services and APIs using Java (Spring Boot / Jakarta EE) for ATS functionality.Develop and maintain RESTful APIs for internal and external integrations.Implement and optimize FIX protocol-based APIs for financial/trading system connections.Ensure low-latency, high-availability, and secure backend systems.Write clean, maintainable, and well-documented code.Collaborate with DevOps to deploy and monitor services in production environments (AWS, GCP, Azure, or on-prem).Optimize database performance (SQL/NoSQL) and design schemas for ATS workflows.Conduct code reviews, unit tests, and integration tests to maintain quality.Troubleshoot performance, scalability, and reliability issues.Stay up to date on emerging technologies, protocols, and best practices in backend engineering.Required Skills & QualificationsBachelor's or Master's degree in Computer Science, Engineering, or related field.3–5 years of professional experience in Java backend development.Strong expertise in Spring Boot, Hibernate/JPA, and RESTful APIs.Hands-on experience with FIX protocol (QuickFIX/J or similar).Solid understanding of multithreading, concurrency, and low-latency system design.Experience with databases (PostgreSQL, MySQL, MongoDB, Redis, etc.).Proficiency with Git, CI/CD pipelines, Docker, Kubernetes.Strong knowledge of security principles (OAuth2, JWT, SSL, encryption).Excellent problem-solving, debugging, and analytical skills.Nice to HaveExperience with financial systems, trading platforms, or ATS solutions.Knowledge of messaging systems (Kafka, RabbitMQ, Redpanda, Chronicle Queue, etc.).Exposure to cloud platforms (AWS/GCP/Azure).Familiarity with microservices architecture and event-driven systems.What We OfferCompetitive salary and benefits packageOpportunity to work on cutting-edge ATS and trading API integrationsFast-paced, innovative, and collaborative work environmentCareer growth with global exposure