Senior Software Engineer

Septeo ES

📍 Barcelona, Catalonia, Spain

part-time Computer Occupations Posted February 25, 2026

Job Description

Job Description

• Ship high-throughput services in Node.js / TypeScript, Kotlin or Java using Spring Boot or Micronaut.

• Leverage AI tooling (e.g. GitHub Copilot, Cursor, Claude code) to accelerate development and share best practices with the team.

• Own the SDLC use IaC (Terraform) to blue-green deployments and manage preview environments

• Continuously profile and tune latency, cost and performance

• Design LLM-powered features and agents using LangChain or MCP-compliant frameworks,  integrating retrieval, memory and tool-use patterns.

• Uphold clean-code & domain-driven design, mentoring peers through thoughtful PR reviews.

• Recognise and propose solutions for scaling weaknesses, performance bottlenecks and security risks.


Qualifications

● 6+ years building production software.

● Deep expertise in at least one of TypeScript, Kotlin or Java.

● Proven experience running containerised or serverle...