ppMangopay is a bwallet‑based payment infrastructure /b built specifically for organisations with complex, multi‑party fund flows. A pioneer in multi‑party payments. /p pOur solution optimises fund flows on behalf of the organisations we work with using wallets as bprogrammable, composable /b building blocks. /p pMangopay’s bregulated platform /b collects payments, secures transactions and holds funds, splits money between the various parties in the funds flow, and ultimately manages the payout to service providers, sellers, and consumers. /p pPlatforms and fintechs using Mangopay regain control and transparency over bmulti‑party payment flows /b, generate additional revenue, and improve operational efficiency. They can stay compliant while innovating and scaling. /p h3Job Description /h3 pAs a principal software engineer you will be part of one of our scrum teams and lead the future architecture and development for the team. We are seeking an experienced Principal Engineer to provide technical expertise in a distributed, highly available application, where system quality and performance is critical. /p pThis is a high‑impact, hands‑on Individual Contributor (IC) role focused on technical excellence and architectural leadership, not people management. You will write code, set standards, and raise the engineering bar across the organization. /p h3Responsibilities /h3 ul liDrive day‑to‑day development activities by leading architectural decisions, designing robust systems, and conducting rigorous design and code reviews. /li liEnsure consistent implementation against existing architectural principles while proactively defining new standards to future‑prove our ecosystem. /li liWork closely with software engineers, principal engineers, architects and product managers to break down complex problems into clean, deliverable value. /li liGuarantee the team adheres to world‑class best practices for system monitoring, alerting, and proactive failure detection.



/li liPartner with the Engineering Manager to identify, propose, and implement strategic technical and organizational improvements within the team. /li /ul h3Qualifications /h3 ul liYou have 7+ years as a Backend developer using Java (Java 11 through Java 21+). /li liYou have experience leading and mentoring backend engineers, providing guidance and direction on best practices and technical decisions. /li liYou have experience building high‑throughput, low‑latency products, ideally within the fintech, banking, or payments industry. /li liYou have experience in developing software using Micronaut or another cloud native framework (Spring Cloud) in large‑scale production systems. /li liYou are comfortable working in a modern cloud architecture using AWS or another cloud environment. /li liYou have deep experience designing, building, and troubleshooting highly scalable, event‑driven systems using Kafka, RabbitMQ, or similar distributed messaging frameworks. /li liYou have the ability to create unit tests and functional with JUnit 5 or Spock. /li liYou are an advocate software engineer learning and growth‑focused mindset and a strong desire to share your skills and learn from those around you. /li liYou have experience leveraging AI‑assisted development tools (e.g., Claude Code, Cursor, Codex, LLMs) to accelerate workflow efficiency, optimize code quality, and guide the team on modern development practices is highly valued. /li /ul h3In the first month, you'll /h3 ul liBecome an expert on Echo’s core APIs, identifying quick wins for immediate architectural or performance improvements.



/li liDeep‑ dive into Mangopay’s integral architecture, understanding how the Echo team interacts with the broader Payments Universe. /li liDevelop your first tasks ensuring consistent implementation against existing architecture principles as well as improve and define new principles. /li /ul h3Within the first 3 months, you'll /h3 ul liGain full autonomy within our event‑driven architecture. /li liTake end‑to‑end ownership of a major technical epic, guiding it from design doc to production. /li liPartner tightly with Product and QA to ensure seamless acceptance criteria and zero‑downtime deployments. /li /ul h3Within the first 6 months, you'll /h3 ul liTake a hands‑on role in influencing and guiding day‑to‑day development activities by leading architecture decisions, participating in designs, design review, code review, and implementation. /li liWork with the engineering manager to propose and implement technical and/or organizational improvements in the team. /li /ul h3Within the first 12 months, you'll /h3 ul liPotential to be part of the hiring process and mentor the next software engineer(s). /li liHave the ability to lead an entire new project transforming product requirements into technical implementation descriptions, take ownership and be responsible to deliver into production. /li /ul h3What we do in Echo /h3 ul liMaintain and improve with new features the product. /li liWe design, maintain, and optimise systems capable of handling massive volumes of concurrent traffic and peak transaction spikes. /li liWe rapidly build and integrate sophisticated new fintech features or payment flows without compromising on system reliability or backwards compatibility. /li /ul h3Recruitment process /h3 ul liHR call (30 min) /li li1st interview with Software Engineer Manager /li liTechnical interview with Senior Software Engineer /li /ul /p #J-18808-Ljbffr

📌 Principal Java Software Engineer (Madrid)
🏢 MANGOPAY
📍 Madrid