Freelancer profile translated to English.
Back to original languageAbout Sergio
Backend Software Engineer | Solving challenges with Java and Kotlin
I am a Software Engineer with a strong background in building scalable, robust, and cloud-native backend solutions. My specialty is developing APIs and microservices using modern technologies like Java and Kotlin.
My goal is to go beyond code to solve your critical business problems. I am dedicated to developing new features, optimizing performance, and fixing complex bugs so you can focus on your product's growth.
Additionally, I have complementary experience in frontend development with ReactJS.
If you are looking for a professional who not only writes code but also contributes to solving your development challenges, I am ready to collaborate.
Spanish
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- OTTO GROUP ONE.OSoftware DeveloperLOGISTICS AND SUPPLY CHAINJanuary 2024 - Today (2 years and 7 months)Madrid, Spain
- Developing a cloud-native logistics project on GCP as a full-stack developer, refining and implementing Java and Kotlin microservices for process and cost optimization.
- Collaborating with cross-functional teams to optimize capacity allocation concerning customer demand.
- Contributing to the strategic migration of on-premise services to cloud-native architectures.
- Leading frontend development with ReactJS, implementing components from MaterialUI and PrimeReact libraries.
- NTT DATAArchitect, Software EngineerENERGY AND UTILITIESMarch 2022 - December 2023 (1 year and 9 months)Ciudad Real, SpainProject: Ship Management System (Cloud Native)
- Leading the backend development team in creating a cloud-native system based on AWS, designing Java-based microservice architectures and establishing development standards.
- Managing deployment infrastructure with Docker, AWS services (ECS, EKS, ECR), and monitoring with Datadog.
- Developing and delivering comprehensive training programs for new team members, ensuring rapid onboarding and productivity.
Project: Cloud Migration - Energy Sector- Leading backend development for the migration of an on-premise monolithic system to a Java microservices-based cloud architecture, focusing on analysis, design, and test planning.
- Developing numerous microservices of varying complexity, with particular involvement in middleware and orchestration with Apache Camel.
- Facilitating effective communication between frontend and backend teams, ensuring smooth integration and project alignment.
- INETUMJunior DeveloperPUBLIC SECTOROctober 2021 - February 2022 (4 months)Ciudad Real, Spain
- Providing technical support, managing incidents, and implementing new features for multiple Public Administration applications.
- Working with diverse technology stacks including Oracle SQL databases, Java back-end (Hibernate, Struts), and front-end technologies (JavaScript, JSP, HTML). Gaining experience in application maintenance and improvement.
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Education
- Master's Degree in Computer EngineeringUNIVERSITY OF CASTILLA - LA MANCHA2021Máster Universitario en IngenierÃa Informática
- Bachelor's Degree in Computer Engineering with Bilingual MentionUNIVERSITY OF CASTILLA - LA MANCHA2020Especialización: Desarrollo de Software
Certifications
- AWS Certified Solutions Architect - AssociateAWS2024
- ITIL® Foundation Certificate in IT Service ManagementAXELOS Global Best Practice2022