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Leonardo MejillonesLM
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Leonardo Mejillones

@leonardomejillones

Senior Software Engineer at TechInsights who modernized semiconductor analysis software and developed distributed processing services.

Bolivia
Message

At TechInsights, I modernized a legacy C++/MFC application for semiconductor analysis, improving image loading and zoom responsiveness by approximately 25%. I also developed Python microservices and REST APIs for distributed data processing in AWS environments.

Across my work, I’ve delivered distributed systems for financial trading, payments, healthcare, and SaaS products. I’m currently pursuing doctoral research in Science & Technology, where I built a machine-learning pipeline for cancer classification from histopathological images.

Experience

Work history, roles, and key accomplishments

TE

Senior Software Engineer

TechInsights

May 2024 - Mar 2026 (1 year 10 months)

Engineered a reverse engineering platform for semiconductor analysis, modernized a legacy C++/MFC application, and architected database migration strategies. Developed Python microservices and RESTful APIs on AWS with Docker.

RO

Senior Software Engineer

Rootstack

Sep 2022 - Feb 2024 (1 year 5 months)

Developed microservices in Java/Kotlin for a B2B nutritional platform, designed a centralized logging module, and refactored legacy code with SOLID principles. Extended Elasticsearch search and Terraform configurations.

UN

Senior Software Engineer

Unosquare

Sep 2021 - Sep 2022 (1 year)

Transitioned to C#/.NET to build Azure Functions and Power Apps for a real estate platform. Refactored microservices with SOLID and Clean Code, and contributed Angular frontend fixes.

WS

Senior Software Engineer

Waverley Software

May 2021 - Sep 2021 (4 months)

Engineered OS-level automation agents in Java, automated workflows for 500+ users, and deployed 50+ bots with 99.9% uptime. Developed backend microservices for configuration and scheduling.

AV

Senior Software Engineer

Avantica

Jul 2020 - May 2021 (10 months)

Developed microservices with Java and Vert.x for a content aggregation platform, achieving 40% throughput improvement and 35% latency reduction. Refactored notification system and integrated Node.js services.

MO

Senior Software Engineer

Mojix

May 2018 - Apr 2020 (1 year 11 months)

Designed features for a payment gateway, implemented state machines, and led Kafka-based inter-service communication. Implemented Redis caching and trained 25 engineers on design patterns.

AS

Senior Software Developer

AssureSoft

Jun 2015 - Nov 2017 (2 years 5 months)

Developed modules for an EMR platform and led security hardening, including CSRF protection and SQL injection remediation. Implemented password validation with real-time feedback.

Education

Degrees, certifications, and relevant coursework

PA

Public University of El Alto

Doctorate, Science & Technology

Doctoral research in Science & Technology with focus on AI applications in healthcare, currently in progress.

AB

Autonomous University of Beni

Master, Software Engineering

2018 - 2020

Master in Software Engineering from the Autonomous University of Beni, completed in 2020.

CB

Catholic University of Bolivia

Bachelor, Computer Science

1995 - 2002

Bachelor in Computer Science from the Catholic University of Bolivia, completed in 2002.

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