Andrés Alejandro Buelvas Vergara
About
Detail
Developer
Bogotá, Bogota, Colombia
Résumé
Jobs
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- NBackend EngineerNextFazeApr 2025 - May 2026 (1 year 2 months)- Designed and delivered the AR System, a middleware integration automating the full work order lifecycle
- Led the refactoring and maintenance of the Document Parser, enabling intelligent extraction and classification of 18+ document types
- Engineered integrations with AI and OCR providers to automate document extraction from images and PDFs
- Primary decision-maker for AI model selection, evaluating Claude, GPT, Mistral, and DeepSeek against cost and accuracy requirements 
Software Engineer IC5 / Junior Engineer Manager public Remote experienceSmartHopFeb 2021 - Jan 2025 (4 years)- Led a fintech engineering team scaling from 1 to 4 developers, delivering modules for invoicing, payroll, wallets, fuel, and billing
- Co-designed SmartPay, an ACH-based payment mechanism serving 30–50 active SaaS clients
- Architected a double-entry ledger system handling up to 70 records per carrier
- Led Payroll V2 redesign delivering the module within a single quarter
- Implemented 2FA enforcement for UNIT API compliance including bank account creation and ACH transfers- Software Engineer IC5 / Engineer ManagerSmartHopFeb 2021 - Jan 2025 (4 years)• Led a fintech engineering team that scaled from 1 to 4 developers, responsible for designing, implementing, and delivering modules for invoicing, payroll, wallets, fuel, and billing. • Co-designed and contributed to the implementation of SmartPay, an ACH-based payment mechanism serving 30–50 active SaaS clients. • Implemented 2FA enforcement as a security requirement for UNIT API compliance, including bank account creation, debit card generation, and ACH/internal fund transfers. • Architected a double-entry ledger system accurately recording income and expenses across client portfolios handling up to 70 records per carrier. • Led Payroll V2 redesign with the full team, delivering the module within a single quarter with on-demand income/ex
- Senior Full Stack EngineerSmartHopAug 2020 - Feb 2021 (7 months)• I have been appointed as the exclusive developer responsible for overseeing all products pertaining to e-commerce, fuel, and insurance within the company.
• Integration with the EFS/WEX API using SOAP for fuel card generation and visualization of transaction activities. The integration architecture followed the OOP model.
• Integration with PLAID, a powerful library that enables secure client authentication (OAuth) within banking institutions, ensuring the safe handling of sensitive banking information.
• Responsible for designing, implementing, and maintaining the Payroll module (V1) infrastructure. Additionally, I utilized TypeScript for enhanced type safety in my JavaScript code and consumed GraphQL APIs to streaml - Full Stack Engineer verified_user Verified experienceSmartHopApr 2019 - Aug 2020 (1 year 5 months)• Developing a dynamic dashboard using Chart.js and React to visually represent user profit through interactive charts.
• Integration of the Stripe API for payment plan subscriptions and secure management of customer payment methods in Node.js and Express.
• Create a password recovery feature that enables users to reset their password securely.
• Utilizing geolocation queries and set theory to efficiently retrieve resources in Redis.
• Developed email implementation and sending functionality using Mandrill and Mailchimp.
• Employed Node.js and Express in the project implementation, leveraging Agile methodologies, specifically Scrum, to enhance project management and team collaboration throughout the developmen - CBackend EngineerCIDITEL–VE Latinux IncJul 2018 - Apr 2019 (10 months)• Developed MECE system, introducing an alternative method responsible for enabling exam takers to gain admission to the Simon Bolivar University as students.
• Developed an online academic exam system that includes a time limit for each category (numerical and verbal ability).
• Developed the teacher's capability to initiate the online academic exam for all students once they are ready, and to promptly receive feedback on the results upon completion of the exams. - LBack End DeveloperLatinux IncJul 2018 - Apr 2019 (10 months)• Built the MECE system, an alternative admission pathway for students applying to Simon Bolivar University. • Implemented a timed online academic exam platform with separate categories for numerical and verbal ability. • Enabled real-time exam control for teachers, including session initiation and instant results feedback.
- Support AssistantSimón Bolívar UniversityApr 2018 - Jul 2018 (4 months)• Developed SisPIO system that empowered numerous students to enhance their skills for the university exams.
• Project utilized for administrative purposes, including control, student tracking and PIO program activities.
Education
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- Modern Software Architecture: DDD, Events, MicroservicesUdemyApr 2025
- Diploma in Software Architecture and Cloud ComputingPontificia Universidad JaverianaJan 2025
- EEF SET Certificate | Writing (C2), Reading (C1), Listening (B2), Speaking (B2)EFSET CertificaciónJan 2025
- AWS Cloud Technical EssentialsAmazon Web ServicesJan 2025
- PDiploma in Software Architecture and Cloud Computing, Software DevelopmentPontificiaUniversidadJaverianaJan 2025
- MProgramming in PythonMeta (Facebook)Apr 2024
- Clean CodeUdemyMar 2024
- MVersion ControlMeta (Facebook)Mar 2024
- MProgramming with JavaScriptMeta (Facebook)Feb 2024
- Introduction to Generative AIGoogleFeb 2024
- MIntroduction to Front-End DevelopmentMeta (Facebook)Feb 2024
- Bachelor in Technology (BTech)Universidad Simón Bolívar VenezuelaJan 2013 - Jan 2019 (6 years 1 month)
- bachelor, Bachelor of Technology - BTech, Computer EngineeringUniversidad Simón BolívarJan 2013 - Jan 2019 (6 years 1 month)
Projects (professional or personal)
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- DDocument Parser public Remote experienceApr 2025 - Current (1 year 7 months)• Developed a FastAPI system capable of classifying, processing, and storing document types from images or PDF files.
• Extracted information using libraries and tools like Tesseract OCR for reading PDFs and images.
• Designed and implemented a state machine to provide full traceability and control over the document processing lifecycle,
including analysis, classification, segmentation, extraction, validation, and final storage.
• Utilized Supabase for cloud database management and S3 buckets for file storage.
• Integrated LangChain, OpenAI and Mistral AI with prompt engineering to enhance the precision of document analysis,
classification, and data extraction. - AAccount Receivable (AR) System public Remote experienceApr 2025 - Dec 2025 (9 months)• Developed a middleware system for automated communication between FSG and Service Channel, handling work order lifecycle, notes, invoicing, and notifications.
• Designed a NestJS application with a Domain-Driven Design (DDD) and a 4-layer architecture for robust component, service, and data access separation.
• Utilized RabbitMQ to implement an asynchronous queue model for task management.
• Deployed a webhook mechanism to facilitate communication between providers and the AR system.
• Integrated state machines with the queuing system to provide full traceability, error handling, and logging for key events
like work orders and invoices, ensuring a flexible and monitored workflow. - PPhoto-Post APPApr 2025This is a microservices-based application with the following services:
- Auth Service: Handles user authentication and authorization
- Users Service: Manages user profiles and information
- Posts Service: Handles creation and retrieval of posts
- Likes Service: Manages likes on posts
- Gateway Service: API Gateway that routes requests to appropriate services - CQRS Blog ApplicationPontificia Universidad JaverianaMar 2025• Development of a Blog API utilizing a microservices-based architecture and the CQRS design pattern with Node.js and Express.js
• Implementation of an API gateway for request redirection, along with a command service for write operations on a MySQL database and a query service for read operations using MongoDB.
• Asynchronous communication between services using RabbitMQ, leveraging Node.js and Express to enhance the overall functionality and performance of the application. - SServerless ProjectFeb 2025Serverless Project and Lambda Functions
- PPortafolio 2024Mar 2024 - May 2024 (3 months)• I have developed a Next.js project to demonstrate my diverse range of academic, professional, and technical skills.
• The view was developed using Tailwind and Schadcn/UI to incorporate a dark-light mode, accordion cards for displaying projects, and enhancing the overall website layout. - CClueGardenClueGardenDec 2020 - Apr 2021 (5 months)• Developing, analyzing, and implementing the infrastructure for an e-commerce system platform that utilizes Stripe as a payment gateway to enable users to subscribe to various plans and services.
• Develop APIs and seamlessly integrate them with the application's user interface. Implemented Firebase communication as a Backend as a Service (BaaS) to leverage Cloud Firestore as the cloud database solution. - GPI SystemUniversidad Simón Bolívar VenezuelaJul 2020 - Sep 2020 (3 months)• University project that implemented academic exam management by monitoring students' knowledge and results.
• Implemented personalized exam complexity adjustments based on individual student levels to strengthen areas of weakness and reinforce previously acquired knowledge.
• Developed a real-time application for conducting academic exams, which showcases data through interactive charts. - SmartHopSmartHopApr 2019 - Jan 2025 (5 years 10 months)