• Designing, developing, and maintaining scalable, high-performance server-side applications and APIs • Building robust microservices architectures • Designing efficient database schemas • Implementing business logic for high-throughput workloads • Collaborating with frontend developers, product managers, and DevOps teams • Translating business requirements into technical solutions • Ensuring code quality and maintainability • Developing and optimizing RESTful and/or GraphQL APIs • Managing relational and NoSQL databases • Implementing event-driven architectures • Leading technical design reviews • Conducting code reviews • Identifying and resolving performance bottlenecks • Implementing caching strategies • Ensuring application security

About Atomic We are a fast-growing, mission-driven company powering the expansion of financial services and wealth creation globally. We build critical financial infrastructure that allows consumer-facing companies to offer engaging investing experiences to their customers in a frictionless way. We host advanced investing capabilities ranging from ESG investing to multi-currency trading across 60 global markets. We are a team of financial empowerment enthusiasts that have come together from various industries including tech, banking, finance, and law. The company closed its Series B and we are positioned to rapidly scale. Come join an exciting opportunity to make a lasting impact! Once here, you will Play a key role in designing, developing, and architecting our microservices. We are a technology-first company, leveraging a cloud-native technology stack (kubernetes, istio). At Atomic, you will help build services that help make it easier for ordinary individuals to secure their financial prosperity. What we are looking for We are looking for candidates who are creative, autonomous, curious, and hard-working. Some things that may make you a great fit: Computer Science degree or equivalent experience 5+ years software development experience Strong fundamentals in data structures and algorithms Experience in successful delivery of high quality production services and systems Ideal Candidates will have: Prior experience in the financial industry. Experience and interest building out fault-tolerant workflows with Temporal Experience with building secure and compliant systems. Technology Stack Go, C++ PostgreSQL, AWS Kinesis, GRPC, Istio, Jaeger Kubernetes (EKS) / AWS Temporal Atomic is an equal opportunity employer that values the benefits of diversity and prohibits discrimination and harassment All employment decisions at Atomic are based on business needs, job requirements and individual qualifications, without regard to age, race, color, religion or belief, stature, gender or sexual orientation, family or parental status, or any other status protected by the laws or regulations in the locations where we operate. Atomic will not tolerate discrimination or harassment based on any of these characteristics.

• Scope and build tools, microservices, workflows, and distributed applications to accelerate data mining and AI training. • Design and implement solutions for streaming, resilience, logging, security, authentication, workflow orchestration, and data management. • Deploy AI models. • Design and develop Retrieval-Augmented Generation (RAG) workflows enabling hybrid and agentic patterns. • Analyze and operationalize complex distributed systems for speed-of-light performance.

• Serás responsable de construir y evolucionar servicios backend para un cliente del sector financiero, desarrollando APIs y microservicios robustos, seguros y escalables que soportan capacidades bancarias (cuentas, transacciones, autorizaciones, préstamos, tarjetas, entre otros). • Desarrollar y mantener APIs REST y microservicios con Java + Spring Boot . • Implementar lógica de negocio, integraciones y flujos transaccionales con buenas prácticas de diseño. • Asegurar calidad del software mediante pruebas unitarias e integración (TDD deseable) y revisiones de código. • Optimizar rendimiento y confiabilidad: manejo de errores, concurrencia, trazabilidad y logging. • Diseñar y consumir servicios con contratos claros (OpenAPI/Swagger), versionamiento y documentación. • Participar activamente en equipos ágiles (Scrum/Kanban), colaborando con QA, DevOps, Arquitectura y Producto. • Identificar y proponer mejoras técnicas: reducción de deuda, refactorización, estándares y automatización.