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Senior Fullstack Java + React + AI Developer
Компания: Affinity
**A Job? Or a Lifetime Experience? Start Yours Here!**
Our mission is to be a meaningful part of our people’s careers. As we grow, so does our determination to offer the best experience to our employees and clients, and that is exactly what drives us. We are a Portuguese technology consulting company with offices in Lisbon, Porto and Óbidos, and representations in Brazil and Tunisia. We have more than 13 years of market expertise, and today we are a universe of around 500 people working on-site, remotely or in hybrid mode on projects in more than 20 countries.
We believe great people make successful companies, which is why we champion the appreciation, recognition and growth of our professionals.
We don’t want to be just another line on your CV. We want you to live a Lifetime Experience with us. We invest in training and certifications that confirm your real progression, promote a healthy work-life balance and offer benefits that make an impact on your personal life and career.
**Key Responsibilities:**
* Develop and maintain scalable backend services and RESTful APIs using Java (recent versions) and Spring Boot;
* Build modern, responsive and high-performance user interfaces with React and Next.js;
* Integrate AI capabilities into applications, such as LLM-based features, through AI services and APIs;
* Design, model and optimise relational databases using MySQL;
* Implement asynchronous communication and event-driven solutions using Kafka;
* Build, deploy and operate cloud solutions on AWS;
* Leverage AI-assisted development tools to improve productivity, code quality and delivery speed;
* Investigate and resolve production issues, ensuring system stability and performance;
* Collaborate with cross-functional teams and stakeholders to deliver robust, high-quality solutions in a Retail context.
**What we’re looking for:**
* Strong experience as a Senior Fullstack Developer, with solid knowledge of both backend and frontend development on production-level systems;
* Strong hands-on experience with Java (recent versions, e.g. Java 17+) and Spring Boot;
* Solid hands-on experience with React and Next.js;
* Experience integrating AI/LLM services into applications (e.g. OpenAI APIs, AWS Bedrock, RAG solutions);
* Experience working with MySQL, including data modelling and query optimisation;
* Hands-on experience with AWS services;
* Experience with Kafka, ideally in event-driven architectures;
* Familiarity with AI-assisted development tools (e.g. GitHub Copilot, Cursor, Claude) is a plus;
* Experience in the Retail sector is a plus;
* Fluent English;
* Based in Portugal.
**Being Affinity**
#Affinity: Building close, empathetic relationships with colleagues, clients and candidates (not just with technologies, languages and platforms). Team spirit and good humour;
#Ambition: Wanting to do more and better. Willingness to exceed expectations and grow personally and professionally;
#Action: The energy to make things happen. Showing proactivity and initiative;
#Learning: The drive to grow individually and collectively and become an expert in the tech market.
**Your #LifetimeExperience**
* Take part in national and international projects in a company built on personal relationships, simplicity and efficiency, with a disruptive approach to the tech market;
* Access a personalised career and training plan, directly proportional to your performance and interests;
* Be part of a welcoming environment of trust, respect and informality;
* Join our Affinity Communities (sports, technology, hobbies, etc.) and take an active part in social and environmental responsibility projects;
* Enjoy a range of benefits, partnerships, discounts, events and internal activities.
Beyond your professional satisfaction, we want to give you memorable leisure and social moments worthy of an Affinity experience.
**Join the Experience!**
Send us your application and get to know us and follow us on:
https://www.instagram.com/affinityportugal/
https://www.facebook.com/affinity.portugal/
https://twitter.com/WithAffinity