Senior Backend Engineer (Go / Rust) (€60K - €65K)

Remote

Full-time

Joppy

About the job

One of the companies we collaborate with at Joppy, a TOP AI startup, is looking for a Senior Backend Developer to play a key role in building and enhancing our AI-driven platform. You’ll contribute to the evolution of our AI-powered Knowledge Processing Unit (KPU), working on cutting-edge solutions that enable multi-step reasoning, tool integration, and deterministic AI outcomes.

This position offers the flexibility of remote work from anywhere in Spain or a hybrid setup in Valencia (1 day/week at office).

Key Responsibilities

  • Develop and maintain APIs and backend services using Go.

  • Work with event-driven architectures, handling real-time data processing.

  • Optimize database queries and manage data consistency across microservices.

  • Ensure scalability, performance, and security of backend services.

Cross-Team Collaboration & Continuous Improvement

  • Work closely with the AI, engineering, and product teams to integrate new features.

  • Contribute to platform-wide improvements, ensuring a seamless developer experience.

  • Participate in architecture discussions to refine and enhance system scalability.

  • Debug and troubleshoot production issues, improving system reliability.

Technical Requirements

  • Experience developing scalable APIs with Go or Python (and willingness to learn Go).

  • Understanding of RESTful APIs, GraphQL, and event-driven architectures.

  • Knowledge of SQL/NoSQL databases and best practices in data management.

  • Familiarity with message brokers (Kafka, EventBridge, RabbitMQ, etc.).

  • DevOps & Performance:

  • Experience with Docker and Kubernetes for container orchestration.

  • Proficiency in CI/CD pipelines and version control (Git).

  • Knowledge of monitoring and logging tools (Prometheus, Grafana, Sentry).

Who You Are

  • 5+ years of experience in full-stack development.

  • Proven experience working on scalable, event-driven systems.

  • Strong problem-solving and analytical skills.

  • Comfortable working in a fast-paced AI-driven environment.

  • Ability to collaborate with both technical and non-technical teams.

  • Professional English (C1) and business-level Spanish (B2 or higher).

What We Offer

  • Competitive salary and long-term career growth.

  • Flexible work setup: fully remote in Spain or hybrid in Valencia.

  • Opportunity to shape the future of AI development.

  • Work on cutting-edge AI technologies with a global impact.

  • Professional development budget and learning opportunities.

Why Join Us?

  • Be part of a team building an AI-driven platform with multi-step reasoning.

  • Work on real-world AI integrations with enterprises.

  • Have a direct impact on product development and innovation.

  • Join a company that values engineering excellence and creativity.

About Joppy

Joppy is a technology recruitment platform built for developers by developers.

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Location: Valencia, Spain

LinkedIn: Senior Backend Engineer (Go / Rust) (€60K - €65K)