J
Juan Pablo Lassala
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Senior Back-End Web Developer
Buenos Aires, Argentina
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Résumé
Jobs
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AI EngineerG2i Inc.Feb 2026 - Current (9 months)Working with G2i on AI projects for a leading Frontier Lab, applying software engineering expertise to help shape the next generation of AI- Senior DeveloperkinemaMay 2025 - Sep 2025 (5 months)- Owned end-to-end delivery of multiple product features for a B2B2C streaming platform, that consists of on-demand video, live virtual screenings and events in person - Developed and shipped console and organization-management functionality used by internal teams to configure content, events and releases - Worked within a structured workflow where a Product Owner defined requirements, the Lead Developer handled final technical approvals and I maintained ownership over implementation details, quality and delivery - Submitted production-ready PRs that, once approved, were merged directly into production. This required a strong focus on correctness, maintainability and risk mitigation.
- Senior Backend DeveloperCocosOct 2024 - Apr 2025 (7 months)- Led the design and implementation of regulatory and tax reporting workflows for a new securities operations platform, ensuring data correctness, traceability and auditability for submissions to Argentina’s national tax authority. - Translated regulatory and fiscal requirements into backend domain logic and reporting pipelines, supporting historical consistency and reproducible reports over evolving data models. - Designed and maintained Node.js services backed by PostgreSQL to support financial operations, card transactions and compliance reporting under strict external deadlines. - Worked closely with founders and the lead developer during the platform’s prelaunch phase, adapting reporting logic and data access patterns as the core schem
- LIndependent Full-Stack EngineerLa despencitaJan 2024 - May 2026 (2 years 5 months)- Designed, built, and maintain a production full-stack rental and inventory management system used daily by a cinema props rental business. - Designed the domain model and data structures, implementing inventory state management and date-based rental workflows with availability constraints. - Built the application end-to-end using a React frontend and a NestJS backend backed by PostgreSQL, owning both client- and server-side implementation. - Implemented authentication using JWT and deployed the backend using Docker on Railway, ensuring production stability and maintainability. - Worked directly with the client to define operational flows and iteratively evolved the system over time based on real usage and feedback.
- Senior DeveloperBixlabsNov 2022 - Dec 2023 (1 year 2 months)- Developed a web-based collaborative whiteboard for Context, a California-based startup focused on concept and idea analysis, featuring OpenAI integration for diagram generation and automated content descriptions. - Built the front-end using Vue 3 and FabricJS, and implemented the back-end with NestJS and MongoDB. Integrated OpenAI through a private API, ensuring isolated LLM contexts per user. - Followed clean architecture principles, design patterns, and unit testing best practices, enabling a new developer to onboard and contribute effectively within a short timeframe. - The front-end was built with Vue 3 and FabricJS, while the back-end leveraged NestJS and MongoDB, with GitHub Actions used for CI/CD and deployment.
- Senior Software EngineerGlobalLogicSep 2021 - Nov 2022 (1 year 3 months)- Refactored billing and subscription services from legacy codebases to SOLID-based architectures, significantly improving maintainability and flexibility. Introduced comprehensive unit testing to enhance reliability and fault tolerance. - Automated chatbot operations for DirecTV using IBM Watson, a dialogue-tree based chatbot. Developed tooling to bulk-edit conversation nodes, reducing maintenance time from days to seconds. - Implemented two-factor authentication, enabling users to verify accounts through existing chat platforms (such as Web and WhatsApp). Coordinated closely with the Brazilian operations team responsible for regional email services.
- RReact / NodeJS Full Stack DeveloperMay 2020 - Sep 2021 (1 year 5 months)- Migrated a legacy ETL system to a microservices-based architecture for importing supermarket goods data from multiple external sources. - Replaced a monolithic application with a set of NestJS-based microservices communicating via Kafka, enabling safer deployments and faster iteration cycles. - Designed the system following SOLID principles and clean architecture to ensure long-term maintainability and scalability.
- FFull Stack PHP/Javascript Developer for Vi-Da Tec S.A.Jun 2019 - May 2020 (1 year)- Contributed to Bidi, an educational e-book and training platform built with Laravel, Symfony, and MySQL, used by institutions and enterprises. - Maintained Leamos, an online e-book store with a subscription model and reading platform, implemented using AngularJS and Symfony–Laravel microservices. - Worked within Scrum-based team workflows.
- Oracle Database and Pro-C DeveloperSofrecomJan 2018 - Feb 2019 (1 year 2 months)- Developed stored procedures for telecom traffic assessment systems. - Maintained a geo-localization platform for oil refineries, transportation, and extraction operations.
- PHP Web DeveloperTELUS InternationalJul 2015 - Feb 2017 (1 year 8 months)- Maintained and optimized a client loyalty management system for a bakery supplier. - Developed and maintained a course management platform for a local dental clinic.
- NodeJS Jr DeveloperEnvoneAug 2014 - Jul 2015 (1 year)Contributed to the development of an enterprise management system covering assets, staff, accounting, inventory, and internal social networking features.
- Junior DeveloperUniversidad de Buenos AiresOct 2012 - Jul 2013 (10 months)Contributed to the development and maintenance of undergraduate and postgraduate management subsystems, implemented in PHP and ASP.NET respectively.
Education
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- Ingeniería en electrónicaUniversity of Buenos AiresJan 2015 - Current (11 years 10 months)
- Grado en Ingeniería, Management Information Systems, GeneralUniversidad Tecnológica NacionalJan 2020