@maxwellsr

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About @maxwellsr

I'm a Senior Software Engineer with 11+ years of proven leadership and technical expertise delivering high-performance and scalable web solutions.

I specialize in building responsive UIs (React / Flutter / Next.js), architecting robust cloud backends (Node.js / Python / AWS), and leveraging AI integration (Langchain / Langgraph / N8N / OpenAI) for optimized performance and workflow automatizations.

12+

Trusted by leading global tech companies including Fortune 500 firms and innovative startups such as Accenture, Cencosud S.A., and Idoo Group. Delivered scalable software solutions that drove measurable business outcomes.

7+

Years of international experience collaborating with cross-cultural teams across North America, Europe, and Latin America. Successfully navigated time zones and cultural differences to deliver exceptional results for clients in U.S.A, U.K., Spain, and emerging markets.

18+

High-impact software solutions delivered across multiple industries including Fintech (payment systems), E-commerce (platform architecture), Healthcare (data systems), and Government Digital Transformation.

let's build something awesome!.

My proven expertise in several Software Engineering areas ensures that I can tackle any challenge you face.

  • Building from Scratch - Creating fast, scalable, and future-proof Next.js applications.
  • AI-Powered Features - Automating workflows, integrating chatbots, and enhancing user engagement.
  • Fixing Bugs & Broken Code - Debugging, API issues, UI glitches that frustrate users.
  • Optimizing Performance - Speeding up apps, improving SEO, and delivering a smooth experience.
  • Scaling Web Apps - Making sure your app grows without downtime or technical limits.

Why work with me?

I bridge the gap between tech and business.

Beyond clean code, I deliver solutions that drive value. From streamlining workflows to boosting ROI, I align technology with your goals —because great software isn't just functional; it's transformative.

I don't just fix problems —I prevent them.

Whether optimizing an existing app or building from scratch, I architect solutions that are scalable, maintainable, and future-proof. My code doesn't just work today—it adapts for tomorrow.

I focus on real results, not just code.

Your web application will run flawlessly under pressure, scale seamlessly with demand, and evolve without costly rewrites. Performance and resilience are baked in from day one.

10+ years of battle-tested expertise.

I've survived every tech trend cycle—from jQuery to Web3—and learned what actually works. You get lean, proven solutions, not over-engineered hype.

I speak DevOps, UX, and CFO.

From infrastructure as code to user-centric design and cost optimization, I translate technical decisions into business outcomes. No jargon, just measurable impact.

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Recent Work

Delivering high-impact solutions that create value - from public-facing applications to enterprise recruitment systems, optimizing processes and saving time at scale.

Developed Mi Mall, a flagship mobile application serving 500K+ visitors at Costanera Center (Latin America's tallest skyscraper), integrating multi-industry services including retail POS systems, food ordering platforms, attraction ticketing (Mirador Observatory), and smart parking solutions (AutoPass/AutoScan).

Mi Mall

Senior FullStack Engineer @ Cencosud, S.A

Developed Mi Mall, a flagship mobile application serving 500K+ visitors at Costanera Center (Latin America's tallest skyscraper), integrating multi-industry services including retail POS systems, food ordering platforms, attraction ticketing (Mirador Observatory), and smart parking solutions (AutoPass/AutoScan).

Architected event-driven microservices infrastructure to synchronize 15+ backend systems, achieving 99.8% uptime while processing peak loads of 5K concurrent transactions during high-traffic events.

- Key achievements
  • Implemented new strategies to support large amounts of notifications to users, from 45K per day to 65K in the same amount of time without scaling up
  • Provided support and developed new modules like Stores Search for Mi Mall mobile app using Ionic (React). This module (backend/frontend) will not only allow full-text based searches but also semantic search using customer intentions. By the end this new feature was able to recommend products, services and food stores
The Agora Design System (AgoraDS) presents a set of rules and guidelines that must be followed in the design and development of public services of the Portuguese State, with accessibility being the central basis for the inclusion of all citizens.

AgoraDS

Tech Leader / Frontend Developer @ Zing Developers / Accenture

The Agora Design System (AgoraDS) presents a set of rules and guidelines that must be followed in the design and development of public services of the Portuguese State, with accessibility being the central basis for the inclusion of all citizens.

- Key achievements
  • Spearheaded adoption of Atomic Design methodology as core component architecture, enabling systematic UI development
  • Designed and developed 50+ foundational React components following WCAG accessibility standards
  • Packaged and published component library to NPM as @ama-pt/agora-design-system for cross-project reuse
  • Enforced Portuguese State Digital Service Guidelines across all components (Decree-Law 83/2018 compliance)
  • Reduced development time by 30% through reusable component ecosystem
  • Implemented Storybook documentation with usage examples for developer onboarding
CV Telecom's customer-facing portal enabling digital service management for 50,000+ users. Delivered core functionalities including mobile balance recharge, contract plan management, invoice payments, and real-time TV scheduling. Reduced customer service calls by 30%. Optimized UX flows to increase conversion rates by 25% for plan upgrades.

alou.cv

Senior FullStack Developer @ Zing Developers / CV Telecom

CV Telecom's customer-facing portal enabling digital service management for 50,000+ users. Delivered core functionalities including mobile balance recharge, contract plan management, invoice payments, and real-time TV scheduling. Reduced customer service calls by 30%. Optimized UX flows to increase conversion rates by 25% for plan upgrades.

- Key achievements
  • Reduced customer service calls by 30%
Portal Unico do Cidadão is a comprehensive digital platform designed to streamline access to government services in Cape Verde, enhancing citizen engagement and service delivery.

Portal Único do Cidadão

Technical Leader @ Opentec / NOSi E.P.E

Portal Unico do Cidadão is a comprehensive digital platform designed to streamline access to government services in Cape Verde, enhancing citizen engagement and service delivery.

As a Technical Leader, I played a pivotal role in the development and implementation of this platform, ensuring it meets the needs of citizens and government agencies alike.

- Key achievements
  • User-friendly interface for seamless navigation
  • Secure payment integration, Appointment scheduling, and document management
  • Secure and scalable API architecture

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