Currently focused on Fintech Engineering in London

Software Engineer Fintech & Blockchain

Building the secure architectures and immutable systems required for modern Fintech. Relocated to London to bridge technical depth with financial innovation.

View Technical Cases Download CV
Spring Boot
Angular
React
Hyperledger Fabric
AWS
Docker
PostgreSQL
Spring Boot
Angular
React
Hyperledger Fabric
AWS
Docker
PostgreSQL
Jean Pierre Farfán Suárez

Professional Background

I am a passionate Software Engineer relocated to London to further my career within the UK's leading Fintech and Blockchain sectors. With a background as a Full Stack Developer at firms like EY, I apply best practices and agile methodologies to build scalable solutions. I currently specialize in Blockchain (Hyperledger) and am actively expanding my expertise in AI and intelligent agents.

Work Experience

Full Stack Developer & Team Lead

2024 - 2026

Asseco Spain

  • Led a team in the analysis and development of monolithic and multitenant architectures, improving system scalability.
  • Adopted Hexagonal Architecture, separating core business logic from infrastructure and frameworks.
  • Shared knowledge and best practices between development teams to improve efficiency, maintainability, and overall quality.
  • Applied logging and tracing practices, including multitenant-aware logging for fast incident resolution.
Team Leadership Full Stack Development Monolithic & Multitenant Architecture Hexagonal Architecture Logging & Tracing Knowledge Sharing Performance & Scalability

Software Developer

2023 - 2024

Ernst & Young

  • Migrated and adapted backend services to a new JBoss environment, maintaining Spring Boot applications with Oracle managed via Liquibase.
  • Developed frontend applications with Angular and Webpack, leveraging component lifecycle, system design, and Storybook.
  • Built and maintained Spring Boot backend services using Spring Security, MongoDB, Redis, and Spring Gateway in a BFF architecture.
  • Ensured secure authentication using JWK/JWT and maintained clear API contracts via OpenAPI/Swagger.
Angular Webpack Frontend Development Spring Boot BFF Architecture Spring Security MongoDB Redis JWK/JWT Authentication OpenAPI/Swagger CI/CD & Code Quality

Software Development Intern

2022 - 2023

Ernst & Young

  • Gained first exposure to microservices architecture and backend systems.
  • Understood the importance of solid framework foundations, architecture principles, and scalable system design.
  • Explored low-code approaches and studied the Innovation Adoption Curve to accelerate development.
Microservices Backend Foundations Node.js System Design End-to-End Development Knowledge Sharing Low-Code & Innovation AI-Assisted Development

Education & Certs

Solutions Architect – Associate (SAA-C03)

In Progress

Amazon Web Services • Expected March 2026

Master’s in Blockchain Engineering

2024 - 2025

CodeCrypto Academy

Bachelor’s Degree in Computer Engineering

2019 - 2023

Francisco de Vitoria University

Specialized Diploma in Ethical Hacking and Pentesting

2019 - 2023

Francisco de Vitoria University

Technical Arsenal

Backend & Cloud

  • Spring Boot Gateway, Batch, Security, JUnit
  • NestJS Gateway, Microservices

Frontend

  • Angular Material, Jest, Reactive Forms
  • React Redux, Router, Hook Form
  • Vue

Fintech Engineering Core

Auditability

Hexagonal Architecture & Event Tracing

Security

JWT/JWK, OAuth2 & Ethical Hacking

Resiliency

Spring Batch & High-Availability Specs

Blockchain & DB Infrastructure

Hyperledger Fabric (Chaincode) Hyperledger Besu (Ethereum JSON-RPC) Solidity / Hardhat / OpenZeppelin MongoDB Oracle PostgreSQL Redis

Technical Case Studies

Exploring complex architectures in Fintech and Blockchain. Real-world problem solving and continuous research.

System Status: ONLINE

Enterprise Banking BFF

Architected a Backend-for-Frontend layer using Spring Gateway and JWT. Optimized for high-security banking environments.

Spring Boot Spring Gateway JWT Security
Case Study

Blockchain Traceability Network

Implemented a private Hyperledger Fabric network for supply chain transparency, including a Car Battery Traceability system and tools to autogenerate private genesis networks. Designed chaincode and ordering services.

Hyperledger Fabric TypeScript Docker Blockchain Supply Chain Genesis Networks
Master's Project

Event-Driven Microservices

Developed reactive services using WebFlux and Redis for real-time data processing. Focusing on non-blocking I/O performance.

Spring WebFlux Redis Reactive Microservices
Documentation Phase
System Status: Pre-Settled Status Valid
Location: London
English: B2+ (Actively Improving)

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