Jesús Izquierdo - Senior Software Engineer

About

I'm a Senior Software Engineer with 8+ years building high-performance C++ systems and scalable Python backends for 3D-focused SaaS products. I specialize in performance-critical pipelines, distributed systems, and product development.

My experience spans from building HPC services, processing 3D workflows to architecting rendering pipelines for web-based applications.

I've spent the last 4 years working 100% remotely with international teams across Europe and the US.

I'm currently exploring contract engagements (>3 months) and full-time remote opportunities with companies building ambitious technical products where engineering excellence is valued.

Featured Project

MiniaturZ - 3D Platform for Online Therapy

MiniaturZ - Real-Time 3D Therapy Interface

MiniaturZ - Real-Time 3D Therapy Platform

Jan 2025 - Present

Engineered end-to-end SaaS from scratch: a real-time, multi-user 3D platformenabling therapists to replicate a specific clinical technique with their patients online.

Key Engineering Achievements:

• Solved critical 3D rendering performance bottlenecks with custom assetpreloading system and KTX2/Draco compression for efficient texture and mesh loading, ensuring smooth UX.
• Architected full infrastructure: containerized microservices, WebRTC for videocalls, Stripe for subscription payments, and CI/CD pipeline.
• Built real-time multiplayer 3D synchronization using custom protocol overWebSockets (Socket.IO).
• Designed scalable backend for video streaming (WebRTC), user management, and session persistence
• Drived 100% of the product / marketing strategy.

Tech Stack:

Next.js TypeScript Three.js WebRTC Socket.IO Docker Nginx Stripe

Status: Production-ready

MiniaturZ | Play Therapy with Miniatures

Interactive 3D Miniature Platform for Online Play Therapy. Conduct sessions remotely with real-time synchronization.

miniaturz.com

Experience

Senior Software Engineer - Contract

Omi · Paris, France (Remote)

Aug 2025 - Dec 2025

SaaS platform enabling brands to create photorealistic 3D models and generate product visuals for marketing and AR.

• Architected C++ asset processing pipelines for 3D model integration with external platforms
• Enhanced in-house artist tools, improving asset processing and scene-building workflows
• Spearheaded performance optimization across applications (C++, Qt), backend rendering pipelines, and real-time webviews (OpenGL)
• Contributed to a modular codebase, with build systems like CMake and QMake participating in peer code reviews for quality
• Integrated AI-generated pipelines into C++ asset processing system, enabling automated assets creation
• Automated artists workflows with Python scripts

Senior Software Engineer

SEDDI · New York, US (Remote)

May 2022 - Aug 2025

Fashion industry SaaS products for texture digitalization and 3D fabric simulation in real-time on the browser.

• Designed and implemented high-performance, scalable HPC services in C++ to support real-time 3D rendering and simulation workloads
• Delivered robust backend microservices and APIs using Python/Flask, enabling scalable and asynchronous jobs
• Built tools, libraries, and Docker-based CI/CD pipelines to streamline development workflows, improving developer productivity and system reliability
• Identified and resolved bottlenecks in distributed processing, enhancing system scalability and performance
• Led code quality initiatives, including refactorings, linting, and high test coverage (Google Test, Pytest), ensuring maintainable and reliable codebases.

Software Engineer

Grupo Epelsa · Madrid, Spain

• Developed multithreaded C++ application for distributed Linux embedded systems
• Designed communication protocols using TCP/IP sockets and Python services
• GUI design (GTK library), unit testing and MariaDB SQL administration
• Full lifecycle development of software: requirements, prototyping, implementation, and testing

View Full Resume (PDF)

Technical Expertise

Systems & Performance

C++17/20 · Python · High-Performance Computing (HPC) · Distributed Systems · Multithreading · CMake · QMake

3D & Graphics

OpenGL · Three.js · React Three Fiber · Blender · WebGL · KTX2 · Draco · Qt

Backend & Infrastructure

Flask · FastAPI · Docker · CI/CD · Microservices · WebRTC · Socket.IO · Linux · RabbitMQ · Google Cloud · SQL (PostgreSQL, MySQL) · MongoDB

Full-Stack (side projects)

Next.js · TypeScript · React · Tailwind CSS · Node.js · Stripe Integration

Software Engineering

Design Patterns · SOLID Principles · Agile · Code Reviews · Refactoring · Git

Education

MSc in Industrial Engineering

Universidad de Alcalá

2015 - 2017

BSc in Electronics and Industrial Automation Engineering

Universidad de Alcalá

2011 - 2015

Endorsements

"Jesus was hired for his depth of knowledge with C++ in high-performance environments. We find this type of engineer very hard to find and we appreciated the excellent technical skills Jesus brought to the business.

He is a polyglot engineer who was always open to working with different technologies... with a curious mindset to learn. We appreciated his openness... He was very easy to work with."

Engineering Manager

SEDDI (Former Employer)

Hire Me

I'm currently available for contract engagements and full-time remote roles. If you're looking for expertise in high-performance C++ systems, scalable Python backends, or 3D workflows, let's talk.

📧 [email protected]

💼 linkedin.com/in/jesus-izquierdo-cubas

💻 github.com/jesusizq

📍 Madrid, Spain (GMT+1) · EU Citizen · Available for remote work globally

I typically respond within 24 hours.