Sr. Backend Engineer

OverviewMurphy AI is a next-generation debt collection platform powered by artificial intelligence, designed to optimize recovery rates while maintaining respectful and personalized communication. Our advanced automation streamlines the process of collecting overdue invoices for businesses, providing a seamless and effective solution. At Murphy AI, we’re tackling one of the toughest challenges in fintech: making debt recovery more efficient, autonomous and scalable. Our AI-powered agents adapt instantly, engaging with debtors across channels like voice, email and sms to maximize results while preserving trust. By combining advanced artificial intelligence with powerful automation, we’re setting a new standard for how businesses recover payments. As a fast-growing startup that has already made an impact within less than a year in the market, we are building a talented team to scale our operations and drive our vision forward. About The RoleAs aSenior Backend Engineer , you’ll build and scale the systems that power ourAI-driven debt collection platform . You’ll work hand-in-hand with AI engineers and product owners to make our system effective, resilient under heavy load, and easy to visualize and control. Along the way, you’ll mentor teammates, champion technical excellence, and apply the latest innovations and practices to keep Murphy ahead of the curve. ResponsibilitiesDesign, develop, and test backend solutions that power our AI-driven debt collection platform — ensuring scalability, reliability, and maintainability as we bring cutting-edge AI into real-world operations. Implement highly scalable software architectures (microservices, event-driven systems, message queues) that allow us to handle thousands of communications every minute. Measure the impact of our system and ruthlessly optimize it to make it more effective and efficient. Collaborate closely with AI engineers to productionize their models, embedding intelligence directly into backend workflows and customer-facing features. Integrate with other services and vendors with a strong focus on seamless interoperability and rock-solid error handling. Mentor and guide junior engineers, sharing expertise in backend best practices and keeping a high bar for security and reliability. Requirements7+ years as a software developer, with a strong background in building backend services and distributed systems. Proven track record developing scalable backend applications in Python (Node.js and Typescript knowledge is a plus). Solid understanding of microservice architectures, event-driven systems (Kafka or similar), and relational databases (PostgreSQL). Prior experience building systems that use AI or interact with it, in organizations or side projects. Familiarity with cloud infrastructure and container orchestration (Kubernetes, AWS/GCP) is a plus. Strong grasp of observability practices, including metrics, tracing, logging, and alerting, to ensure reliable and maintainable systems. Analytical mindset, proactive, self-motivated, and able to make independent technical decisions. Strong collaboration and mentoring experience with junior developers. Our stackAI: Python, OpenAI, 11Labs. Backend: Node.js, TypeScript, microservices, event-driven architectures. Infra: Kubernetes, Postgres, Kafka, AWS. What We OfferSalary : €60k–€80k gross/year Stock options : Because we all build Murphy together – you\'ll own a piece of what we’re creating. Impact : Be part of our startup journey from day one, playing a key role in our growth and building something meaningful from the ground up. Learning : Continuous development through trainings, knowledge-sharing, and exposure to other top-tier startups in our ecosystem. Healthy meals : No more boring tupperware – enjoy daily meals with Nora Foods. We cover 50% of each order Cobee card : Flexible compensation for transport and restaurants, so you can make the most of your net salary. Ride into work : Forget traffic jams – hop on your Panot e-bike and cruise to the office We cover 50% of your subscription. Hybrid & Flexible : Our default setup is hybrid – 3 days a week at our office in Poblenou, surrounded by a thriving tech scene, and 2 days of remote work. But if there’s one thing that defines us, it’s flexibility: we trust you to organize your time and space in the way that helps you do your best work. Our ProcessWe believe that hiring is a two-way street: while we get to know you, you also deserve the chance to understand who we are, how we work, and what makes Murphy AI special. Here’s what you can expect: First Interview – Getting to Know YouA conversation with a future teammate who’s excited to find a new colleague. We’ll talk about your story, what drives you, and what you’re looking for next—no trick questions, just a genuine exchange. Second Interview – Deep DiveYou’ll meet the Hiring Manager and potentially another team member. This is a more technical discussion where we explore your skills in detail, walk through real scenarios, and answer any questions you might have about the role. Tech Assessment or Business CaseA practical exercise to see how you approach challenges similar to those you’d tackle at Murphy. You’ll have time to reflect and showcase your thinking—no rush, no surprises. Coffee at the Office with the FoundersFinally, you’ll join us in our Barcelona office for a relaxed coffee with the founders and the Hiring Manager. It’s the perfect opportunity to experience our culture firsthand and meet more of the team who could soon be your colleagues. To learn more about how we hire and what to expect at every step, feel free to explore our Hiring Guide We are committed to building a diverse, inclusive, and equitable workplace where everyone, regardless of background, identity, or experience, feels valued and empowered to thrive. We believe that different perspectives drive innovation and success, and we actively foster an environment where all voices are heard and respected.#J-18808-Ljbffr