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# Full Stack Engineer

- **Company:** Trust In Soda
- **Location:** Madrid, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Databases, Continuous Integration, Custom Software, Database Design, Github, PostgreSQL, Performance Tuning, Ruby on Rails, SQL Databases, TypeScript, ReactJS, Rspec, Generative AI, Gitlab, Containerization, Kubernetes, Information Technology, React Testing Library, Api Design, Restful APIs, Docker
- **Published:** September 16, 2026
- **Apply:** https://www.buscojobs.com.es/full-stack-engineer-en-madrid-ID-370558802

## About the Role

Solid full?stack experience in startup or product?led teams
SQL Databases, ideally PostgreSQL
Ability to design, build, and deploy production?ready features end?to?end
Proficiency in database design, API development, and performance optimisation
Solid GitHub or code samples that show technical depth and curiosity
Series B funding and strong traction with enterprise, media, and government clients
Work directly on real?time generative AI systems at production scale
Collaborate with senior engineers in a small, high?impact team with no bureaucracy

## Description

Fullstack Engineer - Series B AI Startup | Spain (100% Remote) I'm partnered with a fast?scaling AI startup, fresh off a Series B raise, looking for an early hire Developer to shape the next generation of their platform.You'll build the GenAI behind some of the products that you use every single day.This is a role for hands?on builders who enjoy owning systems end?to?end, from backend architecture to clean, functional UI.You'll work on production?scale APIs, and tooling that powers real?time generative AI applications.You'll work withRuby on Rails, React, TypeScriptRESTful APIs and PostgreSQL (Prisma)Containerisation and orchestration (Docker, Kubernetes)CI/CD (GitLab, GitHub Actions), AWS/GCPTesting (RSpec, Jest, React Testing Library)You bringSolid full?stack experience in startup or product?led teamsSQL Databases, ideally PostgreSQLAbility to design, build, and deploy production?ready features end?to?endProficiency in database design, API development, and performance optimisationSolid GitHub or code samples that show technical depth and curiositySeries B funding and strong traction with enterprise, media, and government clientsWork directly on real?time generative AI systems at production scaleCollaborate with senior engineers in a small, high?impact team with no bureaucracyOwn architecture decisions, ship fast, and see your work go live in weeks100% remote across Europe | Flexible hours | Equity includedIf you want to build the infrastructure and interfaces that make AI talk, get in touch.Seniority level Mid?Senior levelEmployment type Full?timeJob functionEngineering, Information Technology, and DesignIndustriesSoftware DevelopmentIT System Custom Software DevelopmentBroadcast Media Production and Distribution#J-*****-Ljbffr


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