Kevin Lain Sierra Software Developer

Software Developer

CI&T

Feb 2025 - Jan 2026 (1 year)

Senior Frontend Engineer | Next.js & CMS Architecture Architected and embedded high-performance Next.js applications, including dynamic cost calculators, directly into HubSpot CMS. Leveraged Server-Side Rendering (SSR) and Static Generation to ensure maximum SEO indexing and lightning-fast performance for interactive tools. Drove conversion rate optimization (CRO) through data-driven A/B testing on landing pages and core modules, balancing user engagement with SEO best practices to boost lead generation. Engineered rigorous testing protocols for the core logic of embedded applications within the Next.js ecosystem, ensuring high reliability and calculation accuracy across the HubSpot environment. Utilized Claude Code for writing automated

Sr Vue Frontend Developer - Freelance

Amaris Consulting

Oct 2024 - Current (1 year 9 months)

• Development of an MVP for the client Noatum, a leading maritime services company in Spain, using Vue 3 and .NET. Remote job. • Utilized extensive experience in React.js, a similar framework, with over 4 years of hands-on application and a solid understanding of core Frontend Developer principles, to inform and accelerate the development of robust Vue.js solutions.

Full-Stack Developer

Instaleap

Apr 2022 - Jul 2024 (2 years 4 months)

Senior Full-Stack Engineer | Real-Time Systems & Enterprise Solutions Architected a high-performance Segmenter Tool using Next.js and TypeScript, leveraging SSR and API Routes to process complex behavioral heuristics and automate hyper-targeted marketing campaigns. Engineered a real-time delivery tracking system with Vue 3 and NestJS, implementing an event-driven architecture to visualize live courier coordinates and order status updates with zero-latency. This system utilized the Google Maps API to enable real-time tracking and visualization of delivery driver locations, significantly enhancing logistical efficiency. Led the end-to-end development of a global NPS platform, tracking customer satisfaction for major supermarket chains acro

Software Developer

Ideaware

Oct 2021 - Apr 2022 (7 months)

Senior Full-Stack Developer | International Digital Solutions Architected and deployed high-performance digital platforms for US-based companies and local newspapers, utilizing Next.js and Strapi (Headless CMS) as a superior SEO and performance-focused alternative to traditional WordPress setups. • Engineered a comprehensive donation management system and financial dashboard for a pastoral mission, leveraging Next.js and TypeScript to provide real-time revenue tracking and data visualization. • Integrated secure payment gateways by implementing PayPal API, ensuring robust transaction processing and financial security for non-profit applications. • Developed a custom backend infrastructure using Node.js and Express.js to streamline operation

Frontend developer

Triario | Agencia de Inbound Marketing en Colombia

Feb 2021 - Sep 2021 (8 months)

Developed high-traffic landing pages and corporate sites for industry leaders such as Bancolombia and Grupo Éxito, utilizing Next.js and HubSpot CMS to deliver SEO-optimized, performance-driven web experiences. Engineered scalable frontend architectures by building reusable, type-safe components with React, TypeScript, and Tailwind CSS, ensuring strict adherence to complex design systems and client requirements. Optimized organic reach and Core Web Vitals for large-scale informational platforms through Next.js (SSR/SSG) and advanced SEO patterns, resulting in superior indexing and reduced bounce rates. Architected a robust medical software solution using Node.js and Express.js, automating critical billing and appointment scheduling workf

Web Developer

DIGISAP

Jul 2019 - Dec 2020 (1 year 6 months)

Senior Web Developer | Real Estate Projects • Architected and developed high-performance web applications and landing pages for the Real Estate sector using ReactJS and Next.js, ensuring pixel-perfect implementation of design prototypes and a mobile-first approach with Tailwind CSS or SASS. • Optimized organic search visibility and web performance by leveraging Gatsby for static site generation (SSG) and implementing advanced SEO techniques, resulting in improved Core Web Vitals and search rankings. • Engineered scalable backend services and RESTful APIs using Node.js and Express, facilitating seamless data integration between corporate platforms and frontend interfaces. • Integrated Google Analytics and tracking tools to monitor user behav

Kevin Lain Sierra

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Kevin Lain Sierra