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I have been working in software development for over 10 years and in project management for 5+, combining strong technical expertise with the ability to guide projects from concept to successful delivery. My background allows me to move easily between writing clean, scalable code and coordinating teams to achieve ambitious goals. On the technical side, my main stack includes, but is not limited to: * Laravel (7+ years) * Vue.js, React, and React Native (6+ years) * Node.js (~2 years) * Experience with Flutter for mobile applications This diverse toolkit lets me adapt to different project needs, from robust APIs to intuitive user interfaces and mobile apps. On the project management side, I help both startups and established companies shape their technological vision and turn it into reality. I have experience managing projects of various sizes, from small MVPs to larger, more complex systems up to the corporate level. I handle every stage of the process - from planning and resource allocation to execution and delivery - ensuring that business objectives and technical requirements stay aligned. What drives me is the challenge of building high-quality, scalable products while fostering collaboration between clients, developers, and stakeholders. I enjoy translating ideas into solutions that don’t just work today, but are designed to grow and evolve over time.

I’m a senior software engineer with 15+ years of experience in the design and development of enterprise-grade applications, libraries, and tools. My core expertise spans API design and integration (OpenAPI/Swagger/JSON Schema), REST and microservices architectures, OSS development, IoT integration, and Java-based enterprise systems. I have extensive experience leading geographically distributed teams and delivering projects across diverse technology stacks and business domains. Over the past decade, I’ve been a lead maintainer and contributor to several key Swagger and OpenAPI OSS projects, including Swagger Core (30M+ monthly downloads on Sonatype), Swagger Parser, Swagger Codegen, and ApiDOM. I’ve helped evolve these from early-stage codebases into production-ready components widely adopted in both open-source and commercial products, including by major companies. I played a key role in the growth of Swagger/OpenAPI-based commercial platforms, driving architecture and implementation for code generation, SCM and cloud integrations, parsing, validation and plugin frameworks — from concept to profitable SaaS offerings. I'm deeply familiar with the full lifecycle of web and API-driven platforms and integration layers, including protocol implementations and de facto standards. I have also developed and maintained complex systems in varied environments, adjusting architecture and delivery based on constraints, teams, and performance needs. I actively explore AI and agentic technologies and already leverage them in my development workflows. I'm progressively adapting and tuning them to fit API-centric and developer tooling domains — stay tuned. For a sample of my work, see GitHub: frantuma Recent Focus Areas: * Deep API architecture: OpenAPI 2 → 3.2, JSON Schema, AsyncAPI * High-performance Java backends: Spring Boot, JAX-RS/Jakarta, microservices * Developer tooling: Specification and code representation, parsing, validation, transformation, rich editing, integration * Integration: Making systems talk to each other—OpenAPI, REST, APIs, GitHub, Cloud, IoT, TypeScript, Java Services Offered: * API & Platform Consulting: Design-first and code-first approaches, integration, cloud, versioning, generation, linting, rules * Custom Java & TypeScript Development: From greenfield services to deep refactoring and performance optimization * Integration & DevOps: GitHub Actions, Maven Central, Nexus, Docker, AWS IaC * Developer Tooling: Custom language servers, schema validators, code generators * Technology Consulting: Strategic advice and tactical help, from architecture to implementation * Maintenance & Support: Hands-on assistance and issue resolution for complex systems Buzzwords & Stack: OpenAPI, Swagger, JSON Schema, REST, AsyncAPI, GraphQL, SOAP, XML, XSD, JSON Java, TypeScript, JavaScript, Python, Kotlin, Scala, Bash Spring, Spring Boot, JAX-RS, Jakarta, Tomcat, JBoss, Jetty, Apache, NGINX Docker, AWS, Lambda, OSGi (Felix, ServiceMix), Mule ESB, Kafka, JMS, Hazelcast, ActiveMQ Databases: MongoDB, CouchDB, PostgreSQL, MySQL/MariaDB, Oracle, Derby CI/CD: Maven, Gradle, npm, Jenkins, GitHub Actions, Nexus, Bamboo IDE/Tools: IntelliJ, Eclipse, NetBeans, Git, SVN, GitHub, Bitbucket Workflow: SCRUM, Agile, JIRA, Confluence, UML, RSA Testing: JUnit, Mockito, Easymock, Selenium, JMeter, Flyway Android, IoT, Location Services, Google Maps Misc: Wordpress, PHP, Quartz, POI, Jackson, JasperReports, SSO, Facebook/Twitter APIs

ABOUT ME A full-stack Java developer with a passion for creating efficient and user-friendly applications. Proficient in utilizing open-source technologies to develop and implement scalable solutions. Proven ability to turn complex problems into simple and elegant solutions. Committed to staying up-to-date with the latest industry developments and constantly seeking new challenges to grow as a professional.