Back End Developer

Doghouse Recruitment; A distancia; EUR 100.000; Jornada completa

Descripción de la vacante

A fintech start-up is seeking a Senior Backend Developer to join their team in Spain. The ideal candidate will have strong expertise in Kotlin, JVM, and Cloud-native solutions. You will be responsible for maturing high-performance backend services within a rapidly evolving trading platform. The role offers a salary of up to €100k, flexible working hours, and opportunities for international growth. Interested candidates should contact a representative for application details.

Servicios

Remote first role

Flexible working hours

Growth opportunities

Formación

• Minimum of 5+ years of experience in backend development.
• Strong expertise in JVM and CI/CD.
• Experience with Event-driven/sourcing architecture (e.g. CQRS).

Responsabilidades

• Mature the real-time, high-performance backend services.
• Lead new initiatives and impact technical direction.
• Design scalable system architectures and optimize codebases.

Conocimientos

Backend development

Event sourcing

Cloud-native infrastructure

Java/Kotlin

Distributed systems

Terraform

CI/CD

Kafka

Descripción del empleo

Senior Backend Developer | Kotlin, Spring Boot, Kafka, GCP, Microservices, CQRS/Event Sourcing, Docker, K8s, Firebase, ArgoCD, Terraform | Fintech Start-Up | €100k + remote first

I'm currently looking for a Senior Software Engineer with strong JVM & Cloud-native, Event Sourcing & Terraform expertise to join my client, a fast-growing trading company building a SaaS platform for high‑frequency, high‑velocity traders. Their platform empowers more than 6,000 active traders in over 100 countries to monetize their trades efficiently and securely.

The backend consists of 15 microservices built with Kotlin, Kafka as the messaging queue, and everything is hosted in GCP. This is the kind of role where you can truly take ownership. You'll help mature the real‑time, high‑performance backend services, lead new initiatives, and have a direct impact on the platform's technical direction.

Your profile

You are a senior Java/Kotlin developer with deep expertise in building high‑performance distributed, backend services that process and analyze large volumes of data (real‑time). You have a proven track record working with event sourcing and Cloud‑native infrastructure, designing scalable system architectures and optimizing complex codebases for speed, reliability, and maintainability.

Over the years, you’ve worked extensively with Java and/or Kotlin, modern frameworks and backend technologies, consistently applying best practices for distributed systems, data processing, and performance tuning.

Furthermore

• Minimum of 5+ years of experience in backend development
• Strong expertise in JVM, CI/CD, Terraform. Kafka = a plus
• 2 years working experience with Event‑driven/sourcing architecture (e.g. CQRS)
• Experience or strong affinity with distributed systems, data‑intensive applications, or fintech environments.
• Experience with Cloud native development (GCP/AWS)
• You are located in The Netherlands or you are willing to relocate.
• Salary up to €100k annually
• Remote first role with flexible working hours
• International team with growth opportunities

Interested? Please contact Dion Zwinkels at Dion@doghouse‑recruitment.nl