Role Description - Architect and design scalable, high-performance backend systems using Java, Spring Boot, and Microservices architecture - Drive Domain-Driven Design (DDD) practices to align technology solutions with business capabilities - Design and implement event-driven systems, APIs, and distributed services for capital markets platforms - Collaborate with product owners, business stakeholders, and engineering teams to translate functional requirements into technical solutions - Define and enforce architecture standards, best practices, and design patterns - Ensure system reliability, performance, security, and scalability - Lead code reviews, design discussions, and technical governance - Optimize systems for low latency and high throughput, critical for financial transaction processing - Work closely with DevOps teams to ensure CI/CD, observability, and cloud readiness - Support production systems, troubleshoot complex issues, and drive continuous improvements Qualifications - 10+ years of experience in backend development with strong expertise in Java - Hands-on experience in: - Spring Boot / Spring Framework - Microservices architecture - REST APIs & event-driven systems - Strong experience in Domain-Driven Design (DDD) principles and implementation - Experience in designing and building distributed systems in a high-availability environment - Solid understanding of: - Data modeling and database design (SQL/NoSQL) - Messaging systems (Kafka, MQ, or similar) - Proven experience in system design, architecture, and performance optimization - Excellent problem-solving and analytical skills - Strong communication and stakeholder management abilities Requirements - Experience in Capital Markets / Banking / Financial Services domain - Exposure to real-time trade processing systems (Middle Office / Post-trade) - Knowledge of cloud platforms (AWS/Azure/GCP) - Experience with containerization (Docker, Kubernetes) - Familiarity with DevOps practices (CI/CD pipelines, monitoring tools) - Understanding of event sourcing, CQRS patterns - Exposure to Agile/Scrum methodologies

• Embed with engineering teams across Reap to build and integrate agentic payment capabilities into their systems • Own agentic features end-to-end across team boundaries: design the flow, build it where it needs to live, and operate it in production • Build backend services in Node.js / TypeScript (NestJS or Elysia) for high-performance APIs and async jobs • Work with AWS cloud-native services (Lambda, SQS, EventBridge, Aurora, S3, CloudWatch) for scalable, resilient architectures • Turn the agentic payments roadmap into shipped infrastructure • Collaborate directly with product, founders, and the host team's engineers • Leverage AI tools and modern development practices to move fast across multiple systems

Role Description We are looking for a Backend Engineer who works independently and in a self-organized manner, enthusiastic about building scalable products and maintaining high code quality standards. - Design scalable solutions: Develop and maintain Java-based backend applications and microservices with a focus on performance and reliability. - Deliver high-quality code: Implement Spring Boot applications following best practices in clean code, testing, and performance optimization. - Support modern deployment practices: Work closely with DevOps to containerize and deploy applications and integrate CI/CD pipelines. - Leverage event-driven architecture: Use events to build robust, asynchronous systems that support scalability and decoupled services. - Optimize data interactions: Design and maintain efficient relational database integrations that ensure data integrity and system responsiveness. - Contribute to strong engineering standards: Engage in architectural discussions, perform code reviews, and promote best practices. - Leverage AI code companions: Utilize hands-on AI code companions and intelligent development tools to enhance productivity, accelerate development cycles, and maintain code quality standards while staying current with modern development practices. - Mentor and grow the team: Provide guidance to junior developers and foster a culture of collaboration and continuous improvement. Qualifications - 5+ years of experience in backend software development using Java 8 or above - Full stack development experience with proficiency across backend and frontend technologies (Angular or React) - Strong proficiency with Spring Boot and the Spring framework ecosystem - Hands-on experience designing and implementing RESTful microservices - Proficiency in writing optimized SQL queries and working with databases - Working knowledge of Apache Kafka or similar messaging platforms - Strong understanding of asynchronous programming, message-driven systems, and distributed systems - Good understanding of Docker, orchestration platforms like Kubernetes, and CI/CD tools such as Jenkins for automated build and deployment - Fluent in English Requirements - German Language Skills (Nice to have) - Familiarity with performance tuning and monitoring Java applications (Nice to have) - Knowledge of security best practices in backend development (Nice to have) Benefits - Assistance in setting up the project/integrating with the team - Guidance while onboarding - Support in any aspect of your activities - Other Perks & Benefits - Possibility to work remote - Anything you are missing – let's talk! Company Description JUSTROCKET builds awesome products & agile teams – with offices in Cluj-Napoca and Munich – since 2016.

• Build and maintain API endpoints and business logic for remittance transfers • Own integrations with third-party payment and remittance providers • Write clean, tested Laravel code • Build and maintain background jobs and queues • Collaborate with Mobile and Web engineers