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Juan – Python, Typescript, AWS, experts in Lemon.io

Juan

From Spain (UTC-7)

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Tech lead
17 years of commercial experience
AI
Architecture
Communications
Data analytics
Disaster management
E-learning
Govtech
Human resources
Machine learning
Management
Tourism
Chatbots
Enterprise software
Geospatial software
GIS software
Mobile apps
NLP software
Web development
Software development
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Juan – Python, Typescript, AWS

Juan is a seasoned technical leader with a decade in the industry, currently overseeing multiple engineering teams as CTO. He specializes in system architecture, scaling strategies, and infrastructure designed for growth and reliability. His experience spans across startups, including an AI-driven platform, technical team expansion, and direct collaboration with stakeholders. Comfortable shifting between engineering and management, he adapts to what the team and business need most. In addition to his leadership roles, Juan has mentoring experience and previously served as an online instructor, guiding students in technical topics.

Main technologies
Python
5 years
Typescript
6 years
AWS
5 years
Additional skills
React
PostgreSQL
AI
DigitalOcean
Express.js
Next.js
Chat bots
Bitbucket
Redis
React Native
NLP
Sequelize ORM
ElasticSearch
Kibana
CloudWatch
JavaScript
Amazon RDS
DevOps
MongoDB
Ready to start
ASAP
Direct hire
Potentially possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

CTO
May 2023 - Ongoing1 year 11 months
Project Overview

It's a gamified platform for hiring, assessing, and upskilling tech talent.

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Responsibilities:
  • Aligned the product roadmap with business goals and led the execution of the new platform’s development;
  • Oversaw the product's architecture and guided the team through technical choices;
  • Created structured processes, technical guidelines, and clear documentation for architecture and deployment strategies;
  • Strengthened the team’s foundation to support growth, including the upcoming addition of a VP-level role;
  • Conducted interviews to evaluate technical proficiency and cultural alignment of potential team members.
Project Tech stack:
Next.js
PostgreSQL
Typescript
Python
Express.js
DigitalOcean
AI
Bitbucket
Bitbucket Pipelines
Sequelize ORM
MongoDB
VP of Engineering
May 2020 - Apr 20232 years 10 months
Project Overview

It's a platform that turns Salesforce into a smart assistant, letting sales and service teams input data in minutes via voice or text while automating workflows for better forecasting and insights.

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Responsibilities:
  • Maintained the platform’s overall architecture and served as the key technical reference, ensuring scalable and efficient system design;
  • Established AWS environments, resolved bugs, refactored code, and implemented streamlined SDLC processes;
  • Conducted interviews and expanded the team from 2 to 9 engineers;
  • Collaborated with the CEO and CPO to define and execute the platform's product and development strategy;
  • Coordinated and executed the migration from the old platform to the new one;
  • Provided guidance and coaching to both junior and senior developers.
Project Tech stack:
React
React Native
Typescript
Sequelize ORM
PostgreSQL
Redis
NLP
AI
Chat bots
Bitbucket
Bitbucket Pipelines
Tech Lead
Oct 2018 - Jun 20201 year 7 months
Project Overview

It's a software development company with nearshore teams. Here, I worked on a compliance platform automating political contribution data monitoring and contributed to several MVPs for the company's clients, including a U.S.-based financial company.

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Responsibilities:
  • Joined as the first engineer, identified areas for improvement, and helped scale the team to 4 engineers;
  • Led the migration from Docker-Swarm to AWS, setting up RDS, ECS, and other services, while supporting new development and infrastructure;
  • Collaborated with the sales team to write technical proposals for potential clients;
  • Guided new clients through the process of migrating from on-premise architectures to cloud-based solutions;
  • Guided team members to solve problems and improve workflows, while creating internal courses to help them enhance their skills.
Project Tech stack:
Python
React
JavaScript
DevOps
AWS
Amazon RDS
ElasticSearch
Kibana
CloudWatch
Typescript
AI
Sequelize ORM
Full-stack Professor
Mar 2017 - Oct 20181 year 7 months
Project Overview

It's a live, online education platform offering interactive courses in tech and business, focused on hands-on learning, mentorship, and career readiness.

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Responsibilities:
  • Led live classes and mentored students in the Full-stack course;
  • Supported students through hands-on projects, making complex topics accessible and engaging;
  • Received high feedback scores and helped numerous students transition into tech roles.
Project Tech stack:
React
JavaScript
MongoDB
PostgreSQL
Express.js
HTML
CSS
GitHub
Git
Tech Lead / Architect
Dec 2017 - Oct 201810 months
Project Overview

It's a custom bedbank that centralizes hotel inventory, pricing, and bookings for a cloud-native platform to modernize their tourism operations.

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Responsibilities:
  • Designed a scalable architecture aligned with business goals;
  • Led a cross-functional team to deliver solutions using React, Node.js, Docker, and AWS services like RDS;
  • Contributed to the modernization of UX by transitioning from a legacy interface to a modern React-based front end;
  • Supported team growth by providing guidance and sharing knowledge;
  • Acted as the link between stakeholders and engineers to ensure strategic alignment and smooth execution.
Project Tech stack:
Python
.NET
.NET Core
XML
React
JavaScript
MongoDB
PostgreSQL
GIS
Tech Lead / Architect
Sep 2016 - Nov 20171 year 2 months
Project Overview

It's a real-time election monitoring platform built for the Buenos Aires Superior Court to securely track and validate the electoral process across districts.

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Responsibilities:
  • Led the platform’s architecture and technical direction, ensuring it's reliable, scalable, and secure;
  • Established development standards and provided hands-on support to the team, helping resolve challenges and ensuring smooth collaboration;
  • Successfully launched the platform during the 2017 Buenos Aires legislative elections, delivering a stable system under tight deadlines and public scrutiny.
Project Tech stack:
React
Express.js
MySQL
Sequelize ORM
Docker
Docker Swarm
Tech Lead
Jun 2014 - Aug 20162 years 2 months
Project Overview

It's a web app for visualizing and analyzing satellite radar imagery, built for government, research, and agricultural use with advanced search and geospatial tools.

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Responsibilities:
  • Led the front-end architecture, set development standards, and ensured high code quality across the team;
  • Translated complex satellite data into clear, user-friendly interfaces for researchers and public users;
  • Mentored developers to support their growth and ensure the timely delivery of consistent, high-quality features;
  • Built the front end of the educational platform, making satellite imagery accessible to schools and universities;
  • Contributed as the leading developer to an open-source library under the Open Source Geospatial Foundation.
Project Tech stack:
Angular
Node.js
Express.js
Sequelize ORM
PostGIS
PostgreSQL
GIS
Leaflet
Lead Developer
Feb 2013 - Oct 20138 months
Project Overview

It's a civic tech platform for the Municipality of Tigre that enables field agents to report public space issues via a custom Android app, with real-time data sent to a central system for efficient resolution.

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Responsibilities:
  • Developed core system components, including the Android app, backend services, and web dashboard using Java and GWT;
  • Led the integration with Bigtable and optimized data workflows for performance and scalability;
  • Ensured seamless communication between field agents and municipal teams through reliable system features;
  • Built scalable, cross-device solutions to support consistent performance across user types.
Project Tech stack:
GWT
Java
Android
NoSQL

Languages

English
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