Freelancer profile translated to English.

Description

Do you need a solid backend for your product without wasting time on onboarding?

I work with product teams and startups that need to move fast: production-ready REST APIs, payment integrations with Stripe, or cloud infrastructure on AWS — without you having to explain how a startup works from scratch.

What sets me apart is that I don't just come from class projects. I have over a year of real-world production experience at WindowSight, an internationally distributed digital art platform on Smart TV and mobile. I have led legacy database migrations, resolved critical production incidents, and built integrations with Stripe, AWS MediaConvert, and EventBridge from scratch.

Types of projects I usually manage:

REST APIs with Java and Spring Boot

Payment and subscription integration with Stripe

CI/CD pipelines on AWS (ECS, Fargate, GitHub Actions)

PostgreSQL database migrations and optimization

Infrastructure configuration with Docker and Kubernetes

Stack: Java · Spring Boot · AWS · PostgreSQL · Docker · Kubernetes · Redis · GitHub Actions

Industry field of expertise

Languages

Spanish
Native or bilingual
Catalan
Native or bilingual
English
Conversational

Workplace preferences

Remote only

Primarily works remotely

WindowSight
Backend Developer
April 2025 - Today (1 year and 2 months)
Backend developer with real-world experience in a startup environment, currently at WindowSight, an internationally distributed digital art platform on Smart TV and mobile.
I specialize in the development and maintenance of REST APIs with Java and Spring Boot, payment gateway integration (Stripe), authentication and security, cloud video transcoding (AWS MediaConvert), and container deployment with Docker and Kubernetes.
I led the complete migration of a legacy database schema without versioning, developing internal tools for conflict resolution between tables. I act as a technical point of contact for the product alongside the Tech Lead, with direct involvement in critical production situations.
Available for occasional freelance projects: API integrations, AWS CI/CD pipeline configuration, backends with Spring Boot, or automations.
Stack: Java · Spring Boot · AWS (ECS, Fargate, MediaConvert, EventBridge, SQS) · PostgreSQL · Docker · Kubernetes · Redis · GitHub Actions
WITEKLAB
Internship
November 2024 - April 2025 (5 months)
Terrassa, CT, Spain
Full-stack development of a web application to simplify UniFi network management, deployed on embedded devices (Raspberry Pi, BeagleBone Industrial).

Backend with Python and FastAPI
Frontend with Angular
Deployment with Docker in Linux/Windows environments
Database with Redis
CI/CD with GitLab Runner
UI/UX design with Figma

I also contributed to electrochemical sensor projects, developing user interfaces and technical documentation for the KickStat system.

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Higher Vocational Training Cycle, Cross-platform application development
Institut Nicolau Copèrnic
2025
Ciclo Formativo de Grado Superior, desarrollo de aplicaciones multiplataforma
Intermediate Vocational Training Cycle, Computer Science, Communications and Assistance Services
Instituto Salesians Terrassa
2020
Ciclo Formativo de Grado Medio, Informática, comunicaciones y servicios de asistencia

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Raimon Velasco Carbonell

Backend Developer · APIs, Stripe & AWS · Java

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