ppAt Fourthline, our mission is to fight financial crime. We help protect the general financial system by verifying millions of identities for banks, neobanks, online brokers, crypto exchanges, and insurers like N26, Trade Republic, flatexDEGIRO, Nationale Nederlanden, Qonto, Shine, Solarisbank, and more. /p pHaving started our journey in January 2018, we're incredibly proud to count around 250 employees between our Amsterdam and Barcelona offices with over 50 nationalities. /p pPrevent financial crime by building best-in-class SaaS solutions with our talented bAnti-Money Laundering (AML) and Bank Account Verification (BAV) + Qualified Electronic Signatures (QES) teams in Barcelona /b—we’re looking for a Senior Backend Software Engineer who brings solid technical expertise, a product-driven mindset, and a collaborative spirit across diverse domains and skill levels. /p h3As a Senior Backend Engineer At Fourthline, You Will /h3 ul liDesign, develop, maintain, and improve our microservices, and take responsibility for thorough testing and reliable deployments of your stories. /li liProfessionally manage your tasks, priorities and deliverables, taking joint ownership with your teammates for the sprint goals. /li liUtilize your experience to contribute to our growth through lessons learned from your successes and failures. /li liTake responsibility for engineering excellence and participate in architectural decision-making within your team. /li liContribute to thorough documentation—crucial for ensuring success and minimizing questions! /li liUnderstand the entire development lifecycle and work closely with other members in squads, including Platform and QA teams.



/li liEmploy both technical and soft skills to address challenges, recognizing that solutions often require a blend of technology-based and people-based strategies. /li /ul h3Emphasis on Collaboration /h3 pAt Fourthline, we foster a collaborative culture informed by industry knowledge (FinTech) and deep understanding of our business objectives. You will actively participate in chapter meetings, knowledge sharing sessions and cross-discipline alignments with other teams and engineering disciplines. /p h3Career Growth and Development /h3 pAt Fourthline, we offer opportunities for learning and development, allowing you to work alongside and learn from experienced engineers. As you grow within our team, there are possibilities to grow to Staff Engineer level and beyond, with clear pathways to further your technical, problem solving and communication competencies, as well as build your knowledge of the FinTech industry. /p h3Our Stack /h3 ul liNET 5-8 – Our cloud-based microservices architecture includes REST APIs, Docker, Message Queues (RabbitMQ), RDBMS (PostgreSQL), Wolverine, Marten (Doc + Event stores), and much more! /li /ul h3Job Requirements /h3 ul liMinimum 5 years software development experience in one or more general-purpose programming languages.



/li liGood knowledge of .NET 5-8, or .NET Core 3.x /li liProficiency in C# (version 10 or later). /li liExperience in unit and integration testing with XUnit (MSTest/NUnit are a plus). /liliFamiliarity with ORMs (EF Core) and knowledge of Linq. /li liExperience implementing REST APIs using .NET Web API. /li liUnderstanding of SOLID principles and Domain-Driven Design (DDD). /li liKnowledge of common software design patterns. /li liExperience with Git and CI/CD in Azure DevOps. /li liExperience with cloud providers such as AWS and Azure; experience with EKS and Terraform is highly valued. /li liAbility to work on-site at our fantastic office in Barcelona at least 3 days a week as per our Hybrid Working Policy. /li liLanguage skills: English full professional proficiency. /li /ul pAt Fourthline, we believe diversity enriches our culture and inspires you to do your best work. We value your unique talents and perspectives, welcoming them into a safe and inclusive working environment, to ultimately deliver the best products to our customers and society. You're welcome here. Fourthline is for everyone. /p pOur hiring process is designed to be equal, fair, and transparent. We welcome people from all backgrounds, ethnicities, genders, sexual orientations, ages, abilities, religions, and experiences in life. If you're excited about this role, but your experience does not align perfectly with every qualification in the job description, we encourage you to apply anyways. You may just be the right candidate for this or other roles. /p /p #J-18808-Ljbffr

📌 Senior Backend Software Engineer (Barcelona)
🏢 Fourthline
📍 Barcelona