Jhon Casallas Bernal

Technical Lead

Pelmorex

Nov 2024 - Current (2 years)

Led the engineering direction of Pelmorex’s Data Web Platform team, focusing on scalable architecture, operational excellence, and developer enablement. Collaborated cross-functionally with product, UX, and data stakeholders to align technical decisions with business goals. Key Contributions:
• Designed and implemented a real-time monitoring solution using Datadog, improving system observability, reducing incident response time, and proactively identifying performance bottlenecks.
• Established a testing strategy across multiple projects, integrating unit, integration, and end-to-end testing to enhance code reliability and reduce regression issues in production.
• Introduced feature flag architecture, enabling safer deploymen

Chief Technology Officer

CREZES

Aug 2023 - Jan 2026 (2 years 6 months)

• Platform Architecture & Core Systems: Designed and led development of the company’s core technology platforms, including an AI-driven retail POS system and a large-scale geolocation intelligence platform processing tens of millions of mobility signals with sub-30s analytical queries.
• Data & Infrastructure: Built distributed data pipelines and analytics infrastructure capable of processing large-scale mobility datasets and operational retail data, enabling real-time insights for inventory optimization, supplier management, and location intelligence products.
• Engineering Leadership: Built and led a multidisciplinary engineering team across backend, data engineering, and platform infrastructure; established development standard

Technical Lead

Tech Mahindra

May 2022 - Aug 2024 (2 years 4 months)

Engineering Manager

Skydropx LATAM

Jun 2021 - Jun 2022 (1 year 1 month)

• Pioneered the design and implementation of a modular architecture using Domain-Driven Design (DDD) and Command Query Responsibility Segregation (CQRS), reducing carrier integration time from two months to one week and enhancing customer experience.
• Leveraged automation to expedite the integration of new carriers, significantly improving customer satisfaction and eliminating the need for manual intervention.
• Enhanced customer experience by ensuring seamless, real-time integration with multiple carriers. Implemented real-time monitoring using DataDog, proactively improving product performance and reliability.
• Streamlined the development process by implementing automated testing and a Continuous Integration/Continuous De

Back End Developer

Starbucks

Jan 2021 - Jul 2021 (7 months)

Working as outsourcing with S4N I got recruited to join as an outsourcing Developer at Starbucks with a team located in San Francisco. Being responsible for the upgrade, the backend platform implementing new technologies.
• Migrate from Microsoft SQL Server converting existing schemas, SPs and tables from several sources and target databases to PostgreSQL.
• Dead code elimination of source code, such as: I) Eliminate code difficult to reach. II) Eliminate variables whose values are not used. #.
• Implement Test containers.
• Executed bug and application troubleshooting each upgrade of code. Technologies Used: C#, PostgreSQL, dotnet, SQL server, AWS cloud services, Redis, Kafka.

Back End Developer

Lever

Mar 2020 - Dec 2020 (10 months)

Working as outsourcing with S4N, I had a role as a Developer at Lever Company with a team located in Toronto. Being responsible for building and maintaining their Recruiting software.
• Developed Systems Integration with partners and clients through Web Services, APIs and webhooks, and tested and implemented new software programs.
• Implement Technical Documents and specification guidelines for each PR or new feature released.
• Executed bug and application troubleshooting after analyzing customer feedback.
• Keep high-Performance Testing, maintain and recommend software improvements to ensure strong functionality and optimization. Technologies Used: JavaScript, Coffee Script, TypeScript, Derby, Node.js, NoSQL Database (

S

Senior Software Engineer

Jan 2020 - Jul 2021 (1 year 7 months)

Consultant

Everis

Aug 2018 - May 2019 (10 months)

Perform automation processes oriented to the use of software with the objective of reducing human intervention in the use of computer applications, especially in repetitive tasks that vary very little in each iteration and implement in the area manuals and technical specification guidelines for development on the Automation Anywhere platform.

Full Stack Trainer

Fedesoft Colombia

Jun 2018 - Dec 2018 (7 months)

Trainer in competitions to propose solutions and technological scenarios with the construction of applications for mobile platforms from Web components, taking advantage of the following tools and languages (Ruby on Rails, NodeJS, HTM5, JavaScript, Ionic, Angular, CSS3, Google Platform).

Software Development Engineer

Intexus

Feb 2015 - Aug 2018 (3 years 7 months)

Perform and implement manuals and technical specification guidelines for development in C #, VB.NET and Transact SQL languages in SQL Server databases. Support projects giving technical concepts and/or developing modules. Execute consultancies and developments in the banking field with the management of keys and certificates with PIN receiving devices.

Jhon Casallas Bernal

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Jhon Casallas Bernal

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