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 commitment to providing the best experience to our employees and clients — and that's exactly what drives us. We are a Portuguese technology consulting company with offices in Lisbon, Porto, and Óbidos, and representations in Brazil, Tunisia and Cape Verde. With over 13 years of market expertise, we are today a universe of around 400 people working on-site, remotely, or in hybrid setups on projects across more than 20 countries.We believe great people make successful companies, which is why we focus on recognizing, valuing, and developing our professionals.We don't want to be just another line on your CV — we want you to live aLifetime Experiencewith us. We invest in trainings and certifications that reflect your real progress, promote a healthy work-life balance, and offer benefits that truly impact your personal life and career. #welcometoyourfutureSenior Java Developer with C# Responsibilities Develop and maintain thePosition / Trades booking platform. Ensure high standards ofquality, security, and performanceacross the platform. Participate in the Agile development lifecycle, includinganalysis, development, testing, documentation, and code reviews. Collaborate with production support teams forreleases and ongoing maintenance. Work directly withtradersand provideL3 supportwhen required. Requirements 5+ years of experience in software development, including2+ years as a team lead. Strong expertise inJava Core (SE, multithreading, low latency, optimization). Working knowledge ofC#. Solid understanding of theSoftware Development Lifecycle (SDLC). Experience withelectronic trading platformsor high-load distributed systems. Experience working inAgile environments. Experience inmigration and refactoring projects. Degree in aquantitative field(e.g., Engineering, Mathematics, Computer Science).Be Affinity #Affinity– Build close, empathetic relationships with colleagues, clients, and candidates (not just with technologies, languages, or platforms). Team spirit and a positive attitude. #Ambition– Desire to do more and do better. Motivation to exceed expectations and grow personally and professionally. #Action– Energy to make things happen. Show proactivity and initiative. #Learning– Desire to evolve individually and collectively, becoming an expert in the tech market. #Assertiveness– Transparent and honest communication, always giving constructive feedback.Your #LifetimeExperience Work on national and international projects in a company that values personal relationships, simplicity, efficiency, and a disruptive approach to the tech market. Access a personalized career and training plan directly proportional to your performance and interests. Be part of a welcoming environment based on trust, respect, and informality. Join our Affinity Communities (sports, technology, hobbies, etc.) and actively participate in social and environmental responsibility projects. Enjoy a range of benefits, partnerships, discounts, events, and internal activities.Beyond professional satisfaction, we want to give you memorable leisure and social experiences worthy of the Affinity lifestyle.Join the Experience!Send us your application and follow us to get to know us better: https://www.instagram.com/affinityportugal/ https://www.linkedin.com/company/2701281/admin/ https://twitter.com/WithAffinity