Position: Software Engineer - Freelance
Hiring Location: Madrid
Department or business unit: Development
Employment type: Part time - Freelance
Minimum experience required: More than 4 years. Senior Developer.
Remote/Onsite: Hybrid
Why Loud Intelligence?
At Loud Intelligence, you will have the opportunity to work with the most advanced technologies and artificial intelligence solutions in a well-funded startup that fosters your professional growth. Your work will directly impact the campaigns of renowned brands, reaching millions of users through leading platforms, in a flexible and rapidly growing environment.
This role is especially well-suited for senior engineers who enjoy autonomy, want to keep space for personal projects, and are looking to collaborate with a tech-driven, innovative team on the side.
Short Job Description:
We’re looking for a Full Stack Developer with solid experience in web technologies (React, Node.js, Next.js) to support us in the evolution of our platform.
This is a part-time role (10–20 hours/week), offering flexibility and ideal for someone looking to contribute meaningfully to a fast-moving startup without giving up other commitments.
You'll work closely with our tech and product team to deliver features in sprints, optimize existing components, and integrate new services—especially around AI and cloud tools.
Tasks:
* Collaborate on the development of product features using React, Next.js, Node.js, and FastAPI.
* Maintain and optimize existing codebase and UI components.
* Contribute to the design and architecture of lightweight scalable modules.
* Participate in integrations with AI tools, including LLMs, embeddings, and vector databases (guided by the core team).
* Attend occasional sprint meetings, demos or reviews (online).
* Work independently, delivering clean and tested code.
Requirements:
* Solid experience (3–5 years) in Full Stack Web Development.
* Strong knowledge of React, Next.js, and Node.js.
* Familiarity with FastAPI and modern RESTful API design.
* Experience using Git, working with branches and pull requests.
* Ability to work in cross-functional teams (tech/product/AI).
* Located in Spain or within EU-friendly time zones.
* Good communication in Spanish.
* Open to work 10–20 hours/week, with flexible availability.
Benefits:
* Growth Opportunity: If there's a strong mutual fit, you may have the chance to join our core team later on.
* Professional Development: Learn hands-on about intelligent agents (MCPs), LLMs, and scalable AI architectures.
* Cutting-edge Technologies: Work with technological innovations and AI solutions that are transforming the industry.
* Direct Impact: Contribute to campaigns for renowned brands, reaching millions of users through leading platforms.
* Office Benefits: Weekly perks at the office building ( free food, coffee & drink, events..).
About our company:
https://www.loudintelligence.com/