Hire the Best Java Developers
in Portugal

I am a software engineer with 10 years of experience in software development using J2EE and FE technologies. I have a background in building web services, scalable architectures, cloud technologies, and data management. Core experience: • Web Services, Microservices, REST APIs • Agile Scalable Architectures, High Load Systems, Cloud Technologies, Data Management • Java Performance optimization, Bottlenecks, Concurrency and Multithreading • Front-End, Mobile Application and Desktop Development • Agile Development, CI/CD practices, Security Compliance and more Key skills: • Java · Kotlin · Concurrency & Multithreading · JVM & GC tuning • Spring Framework · RESTful API · Security & OAuth 2.0 · SSL · DNS • Micro services · DigitalOcean · AWS · ActiveMQ · Kafka · RabbitMQ • AI, MCP, prompt engineering • MySQL · PostgreSQL · Oracle · MongoDB · Redis · Hibernate · CRUD & POJO • JS/TS · React · Angular · jQuery · Bootstrap · Thymeleaf · Websockets · SPA · Node.js · Vue.js • RCP · OSGi · EMF · Cross-Platform Apps · SWT • Financial Protocols: FIX, FIX 4.2, FIX 5.0, Arrowhead, Swift I’m proactive and self-motivated developer, energetic and driven by engineering challenges which add maximum value to company and users. I will gladly be a part of a professional team that values honesty and good-natured communication

Senior Software Engineer with solid experience designing and evolving enterprise-grade backend systems in large-scale enterprise environments. Specialized in Java and .NET ecosystems, with a strong focus on clean architecture, scalability, and high-availability systems. Experienced across the full software development lifecycle, from technical analysis and solution design to implementation and production support. I value code quality, pragmatic problem-solving, and continuous improvement. Comfortable taking ownership of complex systems, contributing to architectural decisions, and mentoring developers to promote strong engineering practices. Driven, analytical, and proactive — focused on delivering reliable solutions that create real business impact.

I am a systems analyst, software developer, professor and researcher with many years of experience and a PhD in Computer Science. I have developed systems for diverse industries and researched/published mostly in the areas of artificial intelligence and games. I'm also a polyglot with a long experience with languages such as English, French and Spanish.

Expert in Spring and JEE. Vast experience with many top Java frameworks (Hibernate & EclipseLink, iBatis, Struts 1 & 2, Wicket, RESTEasy & Jersey). Excellent knowledge of HTML & CSS, together with javascript and its popular libraries jQuery, ExtJS. Working smoothly in any team, using version control systems like SVN & Git and tools like Ant & Maven. All backed by fluency in DB layer - writing complex SQL & SPs for MySql, Postgres, SQL Server, DB2. Having a comprehensive knowledge of all layers of a modern web enterprise application, I can supervise the technical aspects of a team of developers, as well as choose and set up optimal set of technologies to meet project needs. At the same time I am able to contribute to developing critical tasks. I have extremely high coding standards. The code that I produce is always clearly written, formatted and documented, using recognized patterns and best practices, optimized for execution and scalability, and consistent across the whole project. Maintainability and ease of serving new requests is extremely important. Proper testing, unit and integration, is mandatory. I also demand this criteria for those who I am supervising. Over the last 13 years I've worked in various companies; developing highly critical applications (in terms of responsiveness, reliability and security) for such clients as banks and European public institutions. I'm capable of working according to a strict specification, but also analyzing loose requirements and making reasonable decisions if given enough responsibility on the project.

I'm a Java/Spring Boot backend engineer with 5+ years working inside banking and capital markets systems. Most of my career has been spent building and maintaining robust and scalable financial systems, production systems handling actual transactions, reconciliations, and trade flows. Over the past year, I've focused specifically on payment integration work: wiring up Stripe, open banking APIs, and third-party payment gateways into Spring Boot backends. I handle the full integration layer — REST/webhook endpoints, idempotency logic, retry mechanisms, error handling, and async event processing. I don't just make the API call and call it done, I build it the way a bank would expect it to be built. What I typically help clients with: Integrating Stripe, PayPal, or custom payment gateways into existing Spring Boot applications Building webhook listeners with proper signature verification and idempotency Designing payment flow architecture (charge, refund, dispute, reconciliation) REST API design and implementation for financial workflows Fixing or extending legacy Java payment code that's causing production issues I work cleanly, communicate clearly, and deliver what I say I'll deliver. Fixed-price projects are my preference for well-scoped work, you know what you're paying, and I know what I'm building. If you have a Java backend that needs payment functionality added or cleaned up, let's talk.

Hi 👋 I'm Eduardo, a dedicated and experienced Front-End Developer with over 7 years of experience working with brands and corporations of all sizes. My MO is to stay critical, meet deadlines and maintain global coordination with my clients or their teams ensuring that we achieve the best results possible. I am highly skilled in modern technologies such as: ‣ Javascript ‣ Typescript ‣ React ‣ Next.js ‣ TailwindCSS ‣ Node.js ‣ Bootstrap ‣ Sanity CMS ‣ Storyblok ‣ Dato CMS I also have very good experience with tools such as: ‣ Git ‣ Figma ‣ Vercel ‣ Framer Motion ‣ AdobeXD ‣ Firebase My expertise in building complex UI on web applications enables me to deliver solutions that are both visually stunning and highly efficient. Let's work together to take your project to the next level!