Kelson

As a seasoned software engineer with over 15 years of experience, I specialize in system integration and Java web application development. I thrive in environments that leverage my diverse expertise across backend and frontend technologies, cloud platforms, DevOps, and blockchain innovation. I support sales teams in pre-sales environments through strong communication skills and confident public speaking. My technical stack spans Java, Kotlin, Python, JavaScript and Rust coupled with clean code principles, architectural patterns (Hexagonal, DDD), and testing strategies (TDD). Currently, I serve as a tech lead at Act Digital, driving digital transformation across multiple domains. I play a key role in backend development using Java Spring Boot, REST APIs, Apache Camel, data formats (XML, JSON, Avro, gRPC, Thrift), and Angular frontends. **Core Skills:** * **Backend:** Java Spring Boot, Golang, Rust, REST APIs, Apache Camel, gRPC, Quarkus, JPA/Hibernate, Flyway, Maven, Gradle, Bazel, OpenAPI, Spring Cloud, Jhipster, Saga Patterns, WebFlux, Python, NestJS, Axum, Tokio, Serde, Cargo. * **Microservices:** Expertise in distributed systems with OAuth2, JWT, HATEOAS, SQL/NoSQL, NodeJS, NextJS, PHP. * **Frontend:** Angular, ReactJS, jQuery, VanillaJS, JavaScript. * **Observability:** Resilience4J, CircuitBreaker, Bucket4J, Grafana, Prometheus. * **Cloud & DevOps:** AWS (IAM, S3, SES, RDS, VPC, EC2, ECS, EKS, Route 53), Docker, Kubernetes, Kafka, IBM MQ, RabbitMQ, Elasticsearch, Linux scripting. * **Librarianship Systems:** DSpace, OJS, Discovery Systems, MARC21, Dublin Core, ISO2709. **Blockchain & Web3:** I’m expanding into decentralized systems with hands-on experience in Ethereum, Bitcoin, Solidity, and smart contract development. I work with tools like Hardhat, Truffle, Web3.js, and Metamask, contributing to blockchain-based solutions and exploring on-chain data interactions, dApp integrations, and cryptographic security practices. **Beyond Code:** My early background in customer sales cultivated strong communication and strategic thinking. I excel in collaborative settings and leadership roles, aligning tech solutions with business value. I support sales teams in pre-sales environments through strong communication skills and confident public speaking. I’m a driven professional who thrives on solving complex challenges and contributing to innovative, scalable, and secure systems—whether on-chain or off.