Senior Backend Engineer, FinTech — Madrid

JPMorgan Chase & Co.; Madrid; On-site; EUR 60,000 - 90,000; Full time

Job summary

J.P. Morgan Personal Investing is seeking an engineer to join a squad delivering a first-class mobile and web investment experience.

You will build and integrate with digital asset providers, work in a Java/Spring Boot/Kotlin stack, and evolve architecture toward microservices on Kubernetes with Kafka. You will collaborate with Product, Compliance and Risk to meet regulatory and security requirements, write high-quality tests, and own tasks from start to finish in a fast-paced fintech

Qualifications

• English working proficiency is a must; you will be working with the team in London.
• Hands-on experience with exchange, brokerage, custody, wallet, or settlement systems for digital assets.
• Experience with a JVM language and Springboot.
• Experience designing event-driven architectures with Kafka for high-throughput data.
• Experience integrating with third-party financial/trading APIs (REST, WebSocket, FIX).
• Familiarity with blockchain networks: Bitcoin, Ethereum, Layer 2s.

Responsibilities

• Build and maintain integrations with digital asset providers and infrastructure (on ramp/off ramp).
• Work with Product to understand user needs and follow Agile SDLC; stack includes Java/Springboot, Kotlin, DynamoDB, Aurora/MySQL, AWS.
• Design evolving architecture; use ADRs; microservices on Kubernetes with Kafka and event-driven design.
• Partner with Compliance/Risk/Operations to ensure regulatory and security controls.
• Take ownership from estimation to release and post-production.
• Identify, troubleshoot and resolve defects affecting balances, order flow, settlement, or asset movement.
• Write tests and ensure deterministic, auditable code paths.
• Participate in releases and aim for frequent deployments.
• Participate in code reviews and knowledge sharing sessions.
• Contribute to technical initiatives to improve codebase and tooling.

Skills

Java

Kotlin

Spring Boot

Kafka

REST APIs

Blockchain

Web3

Git flow

CI/CD

Agile SDLC

Tools

DynamoDB

Aurora/MySQL

AWS

Infura/Alchemy

Job description

J.P. Morgan Personal Investing is seeking an engineer to join a squad delivering a first-class mobile and web investment experience.

You will build and integrate with digital asset providers, work in a Java/Spring Boot/Kotlin stack, and evolve architecture toward microservices on Kubernetes with Kafka. You will collaborate with Product, Compliance and Risk to meet regulatory and security requirements, write high-quality tests, and own tasks from start to finish in a fast-paced fintech