CareerPlan

Senior Backend Developer (Java or Kotlin)

ValenciaFull-time2026-10-30 → 2026-11-11
Hybrid

Core

Design and implement complex backend services and features for core system domains, ensuring high quality and scalability.

Role type

Senior Backend Developer (Java/Kotlin)

Builds

Core backend services and scalable solutions

Domain

Fintech / Banking

Deliverable

production ML models | product features

Required skills

Java, Spring Boot, Kotlin, Postgres, Kafka, REST APIs, Reactive Programming, CI/CD, Performance optimization, Security best practices

Preferred skills

Grafana, Prometheus, Mentorship, Process improvement

Responsibilities

Deliver complex backend features end-to-end with minimal supervision; Mentor and support other developers through code reviews and knowledge sharing; Take ownership of core functions or domain areas; Lead efforts to improve team processes including code quality and testing; Collaborate with Product Owners, QA, and DevOps to deliver reliable solutions; Serve as a technical expert and informal leader.

Seniority

Senior, hands-on IC with mentorship responsibilities