Miguel Gisbert, Full-Stack Software Engineer

Miguel GisbertSenior Full-Stack · Software Engineer

Available for new projects · Remote (CET)

I build web and mobile applications end-to-end, from idea to production. 10+ years helping startups and enterprises ship reliable software.

Services

How I can help your product

Web App Development

Full-stack web apps built to scale — from MVP to production. React, Next.js, Node.js and PostgreSQL, with clean, maintainable code.

Mobile Apps

Cross-platform iOS and Android apps built with React Native.

AI & LLM Integration

RAG pipelines, chatbots and automations connected to your product and your data.

App Rescue & Scaling

I take over, fix and scale existing codebases: performance, refactors, CI/CD and reliability.

Have a project in mind?

Tell me what you're building.

Book a call

Skills

Full-stack engineering with production-grade AI & LLM pipelines

Frontend & Mobile

ReactTypeScriptNext.jsReact NativeRedux / Context APICSS & Design Systems

Backend & Infrastructure

Node.jsPython (Django)PostgreSQL / MySQLDockerCI/CD (GitHub Actions)REST APIs

AI & ML Integration

RAG PipelinesLLM IntegrationVector DBs (Chroma, PGVector)Text Embeddings

How I work

A simple, low-risk process

01

Discovery call

A free 30-minute call to understand your goals, scope and constraints.

02

Proposal & plan

Clear scope, timeline and pricing — fixed price or weekly rate, no surprises.

03

Build in the open

Weekly demos and a shared board, so you always see progress and can give feedback early.

04

Launch & support

Deploy, handover and support. I reply within 24 hours on business days.

Reviews

What people say on LinkedIn

General Manager | Operations & major events | P&L, ×3.9 scaling and 28% EBITDA | UEFA · Vuelta España · Live Nation

Recommended the service: Custom software development

5.0 ·June 15, 2026

Working with Miguel on the development of LegalPyme has been a very positive experience. Beyond his technical skills, I would highlight his ability to understand business needs and turn them into practical, functional solutions. Throughout the project he showed commitment, flexibility and a strong results orientation. Thank you, Miguel, for your dedication and professionalism throughout this journey.

Industrial Design Engineer | FTTH network project design | Graphic design, UI, 3D | Illustration

Andrea worked with Miguel in the same team

5.0 ·August 9, 2026

I had the opportunity to work alongside Miguel on a project where he was responsible for the entire development of a web platform, including more complex features such as an interactive map, profile creation and management, registrations and a member directory, among others. He also does very good work on optimising and adapting the interface design, achieving a much more intuitive, fluid and efficient user experience. As part of the project, he was also responsible for developing the mobile apps for Android and iOS. Beyond his technical skills, I would also highlight the way he works: he is resourceful, ingenious, committed and very hard-working. He always looks for solutions to problems and is able to find practical alternatives in complex situations. The experience of working with him has been excellent and I would undoubtedly recommend him for any project that requires technical ability, initiative and commitment.

Emotional intelligence and empathetic communication specialist for wellbeing. Ontological coach. I support individuals, schools (students, teachers and families), companies and organisations.

Laia was a client of Miguel

5.0 ·June 27, 2026

I have had the privilege of working with Miguel on the creation of my professional website (www.laiabobe.com) and I could not be happier with the result. From the very first moment he understood the essence of my project and captured what I wanted to convey with my personal brand. It was very important to me that the website reflected who I am and the way I work, and Miguel achieved this beyond my expectations. Throughout the whole process he stood out for his professionalism, his ability to listen and his commitment. He didn't just build a website: he contributed ideas, took care of every detail and was very willing to make the necessary adjustments until the result fully matched what I had in mind. At all times I felt heard, supported and well advised. The final result is not only a well-designed and functional website, but one I feel fully represented by. I recommend Miguel to any person or company looking for a rigorous, creative, committed professional with great human quality. If I ever need to develop another web project, I will not hesitate to work with him again. It has been a real pleasure to work with him.

Frequently asked questions

Everything clients usually ask before we start

How much does a project cost?

It depends on scope. I offer fixed-price projects for well-defined work and a weekly rate for ongoing development. The free 30-minute call is where we agree scope, timeline and price, so there are no surprises afterwards.

Do you work with clients in the US and the UK?

Yes. I work remotely with teams in the US and the UK. I'm based in Spain (CET), which gives full-day overlap with the UK and about four hours of overlap with US Eastern time.

What is your availability?

I'm available for new projects and take on a limited number of clients at a time. You get a reply within 24 hours on business days.

How do we start working together?

Book a free 30-minute call or send a message through the contact form. We talk about your goals and constraints, and I come back with a proposal covering scope, timeline and price.

Can you take over an existing codebase?

Yes. App rescue and scaling is one of my services: performance work, refactors, CI/CD and reliability for products that already have users.

What does AI & LLM integration include?

RAG pipelines, chatbots, automations and speech features connected to your product and your data, using OpenAI or Anthropic APIs with vector databases such as PGVector or Chroma.

Which technologies do you work with?

React, Next.js, TypeScript, Node.js, React Native, PostgreSQL and Python, delivered with Docker and CI/CD.

Contact

Have a project in mind? Let's talk

or send a message