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# Senior Software Engineer - Ai Agents & Developer Platform

- **Company:** Fever
- **Location:** Toledo, Spain
- **Contract:** Permanent contract
- **Skills:** Multitier Architecture, Artificial Intelligence, Cloud Engineering, Databases, Continuous Integration, Relational Databases, Software Design Patterns, Software Engineering, SQL Databases, Large Language Models, Multi-Agent Systems, Backend, Restful APIs, Automation Anywhere
- **Published:** September 27, 2026
- **Apply:** https://www.buscojobs.com.es/senior-software-engineer-ai-agents-developer-platform-en-toledo-ID-372568090

## About the Role

Requisitos principales 5+ years building and operating production software at meaningful scale with end-to-end ownership
Strong software design fundamentals: testing, design patterns, clean architecture
Backend depth: RESTful APIs, relational DBs and SQL, distributed/event-driven patterns behind high-traffic services
Full production ownership: CI/CD, observability, infrastructure
Proficient business English
1-2+ years shipping LLM applications to production with hands-on context engineering, RAG, multi-agent orchestration, and evals
Authored skills, sub-agents, evals, or verification harnesses and can walk through real work
ability to thrive in a fast-paced startup environment
measurement-minded approach to experiments and impact
clear communication across cross-functional teams
RESTful APIs
Relational databases and SQL
Distributed and event-driven patterns (queues, messaging)

## Description

OverviewIn this role, you will help define how AI transforms Fever's Product Engineering, starting from solid backend foundations to AI-powered tooling. You'll build scalable systems, harnesses for agents, evaluation infrastructure, and delivery rails that ship reliable outputs across the company. You'll work within the AI & DevEx team to raise the performance of squads through end-to-end ownership of tooling, CI/CD, observability, and infrastructure. This is a high-impact opportunity to shape AI-driven engineering at a global leader in live entertainment.Compensaciones / Beneficios base salary with potential significant bonusstock options40% discount on Fever eventshome office-friendlyhealth insurance and flexible remuneration via CobeeEnglish lessonsResponsabilidades Build agent harnesses, guardrails, and verification systems for high-quality, trustworthy agent outputDevelop shared knowledge substrate read/write by agents across FeverOwn cloud development environments, CI runtime, and autonomous-delivery railsIdentify AI-enabled improvements to squad planning, coordination, and daily workflowsDesign evaluation and metrics systems (baselines, before/after, DORA metrics, lead time) to ensure changes ship on signalOptimize AI workflows for speed and cost (routing, caching, self-hosted vs frontier models)Maintain production-grade software practices (testing, design patterns, CI/CD, observability)Requisitos principales 5+ years building and operating production software at meaningful scale with end-to-end ownershipStrong software design fundamentals: testing, design patterns, clean architectureBackend depth: RESTful APIs, relational DBs and SQL, distributed/event-driven patterns behind high-traffic servicesFull production ownership: CI/CD, observability, infrastructureProficient business English1-2+ years shipping LLM applications to production with hands-on context engineering, RAG, multi-agent orchestration, and evalsAuthored skills, sub-agents, evals, or verification harnesses and can walk through real workability to thrive in a fast-paced startup environmentmeasurement-minded approach to experiments and impactclear communication across cross-functional teamsRESTful APIsRelational databases and SQLDistributed and event-driven patterns (queues, messaging)


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