Beschreibung

Backend engineer with 7+ years building production distributed systems for Iberia, KPN, Mercadona, Inditex, Openbank, Idealista, and Empathy.co. Java and Kotlin on Spring Boot, Kafka, PostgreSQL, and AWS, with hexagonal architecture, DDD, and TDD as daily practice rather than buzzwords. Working as a B2B contractor. Available remote or on-site in Madrid.

Sprachen

Spanisch
Muttersprachlich oder zweisprachig
Englisch
Verhandlungssicher

Arbeitsortpräferenzen

Vor Ort möglich

Madrid (bis zu 50 km)

Freelance Contractor
Senior Backend Engineer
HIGHTECH
November 2023 - Heute (2 Jahre und 7 Monate)
Madrid, Spanien
Senior Backend Engineer working as a B2B contractor across multiple clients in Europe. Clients include Iberia (flight reservation platform), KPN (fiber installation tracking), Mercadona (product analytics), and Inditex (global logistics). Stack: Java, Kotlin, Spring Boot, Kafka, PostgreSQL, AWS, Docker. Hexagonal architecture, DDD, and TDD as daily practice.
Hexagonal Architecture Kotlin Kafka Java
OPENBANk
Senior Backend Engineer
HIGHTECH
Oktober 2022 - November 2023 (1 Jahr und 1 Monat)
Madrid, Spanien
Investment automation platform with 100+ backend engineers on top of T24 core banking. Serverless batch pipelines on AWS Lambda processing millions of financial transactions per day. Led the Java to Kotlin migration across multiple backend services and Lambdas. Delivered internal tech talks on DDD, hexagonal architecture, and design patterns to ~50 engineers. 24/7 availability in a highly regulated banking environment. Stack: Java, Kotlin, Spring Boot, PostgreSQL, AWS (Lambda, S3), Elasticsearch, Docker, MockK, T24.
Kotlin Java Spring boot
idealista
Senior Backend Engineer
HIGHTECH
März 2021 - Oktober 2022 (1 Jahr und 7 Monate)
Madrid, Spanien
Digital contract-signing platform across Spain, Portugal, and Italy. REST APIs and Kafka event streams for real-time signing events. Event sourcing patterns to maintain a full audit trail of contract history. Occasional React contributions. Ran team katas and code review sessions to raise code quality. Stack: Java, Kotlin, Spring Boot, PostgreSQL, Elasticsearch, Kafka, Docker, Event Sourcing, DDD, TDD.
Kafka Kotlin