Walter Castillo

Experience

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  Winix Devs

  Jul 2019 - Nov 2020

  DevOps Engineer | Backend Developer

  At Winix Devs, I worked as a DevOps Engineer and Backend Developer, focusing on building scalable backend systems and optimizing development workflows. My role involved designing, deploying, and maintaining cloud infrastructure, ensuring high availability and performance for enterprise applications.

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  Nathan Associates

  Nov 2020 - Aug 2024

  Software Developer Analyst Supervisor

  At Nathan Associates, I served as a Software Developer Analyst Supervisor, leading full-stack development and system architecture for USAID’s Regional Trade Facilitation and Border Management Project. My work focused on modernizing government systems across El Salvador, Guatemala, and Honduras, improving trade efficiency and compliance.Key Responsibilities:- Technical Leadership – Led the development of a Business Process Management (BPM) system, optimizing trade facilitation processes.- Full-Stack Development – Designed and implemented scalable solutions for government institutions.- Project Implementation & Integration – Oversaw system rollouts and ensured seamless adoption by stakeholders.- Collaboration & Stakeholder Management – Acted as a bridge between government tech teams and project management, aligning development efforts with strategic objectives.During my tenure, I played a critical role in enhancing cross-border trade systems, automating processes, and ensuring compliance with international trade standards, ultimately driving efficiency and transparency in government operations. Show less

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  Almacenes SIMAN

  Aug 2024 - now

  Senior Web Developer

  At Almacenes SIMAN, I lead User Experience (UX) Development and Web Development, ensuring high-quality digital experiences for our e-commerce platforms across Central America. My role involves collaborating with design teams and CMS to create intuitive, visually cohesive, and user-friendly web solutions.Key Responsibilities:- UX Strategy & Development – Enhance usability and maintain a consistent visual identity across digital channels.- Web Development – Implement and optimize web projects that drive engagement and performance.- Prototyping & UX Design – Create interactive prototypes and design solutions that align with business goals.- Content Quality Assurance – Ensure content accuracy, accessibility, and adherence to brand guidelines.- Design System Implementation – Apply and maintain the company’s design language for a seamless customer experience.My focus is on bridging UX best practices with technical excellence, ensuring that our digital platforms provide seamless and engaging shopping experiences for users. Show less

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  IESC - Improving Economies for Stronger Communities (formerly International Executive Service Corps)

  Feb 2025 - now

  Senior Software Engineer | Consultant

  As a Senior Software Developer Consultant, I provide specialized software development services for the Agricultural Trade and Climate Smart Innovations (ATraCSI) project. My primary focus is designing and implementing electronic payment functionalities within the Foreign Trade Facilitation System (SFCE) of CIEX to modernize and streamline the import process for regulated products.Key Responsibilities: • Develop and integrate electronic payment solutions for prior import inspections at the Ministry of Agriculture and Livestock (MAG). • Analyze existing manual payment processes and propose scalable, automated solutions. • Design system architecture, develop secure APIs, and ensure seamless integration with existing platforms. • Collaborate with CIEX analysts, QA specialists, and the Central Reserve Bank (BCR) to meet stakeholder requirements. • Conduct rigorous QA testing and user acceptance testing (UAT) to ensure high-quality deliverables. • Oversee implementation, provide knowledge transfer sessions, and support technical documentation.Key Achievements: • Led the transition from a manual, error-prone payment system to a fully digital and traceable solution, reducing processing times and administrative overhead. • Enhanced operational efficiency for MAG and CIEX, improving compliance with international trade standards. • Delivered a centralized payment system that ensures transaction traceability and revenue accounting for government institutions. Show less