Euclides Rosário

Front-End Specialist • Mobile Engineer • UI/UX & Product Designer

Luanda, AO.

About

Highly accomplished Front-End and Mobile Engineer with over 9 years of experience, complemented by a strong background in UI/UX and Product Design. Expert in crafting visually appealing, user-friendly experiences for web and mobile platforms, aligning technical solutions with strategic business objectives. Proven leader in IT strategy, team management, and full-stack development, delivering scalable applications and innovative design solutions that drive engagement and efficiency.

Work

Tripee

Senior Software Engineer // Full Stack Developer

São Paulo, São Paulo, Brazil

Apr 2024→ Dec 2025

Summary

Developed scalable, high-performance full-stack applications for Tripee, focusing on clean architecture, seamless integration, and enhanced user experience.

Highlights

Engineered scalable, high-performance applications using TypeScript, Node.js, and React, ensuring clean architecture and maintainable codebase.

Designed and implemented robust RESTful APIs and microservices, facilitating seamless integration with front-end interfaces.

Built responsive, user-friendly interfaces with React, leveraging hooks, context, and custom components to significantly enhance user experience and accessibility.

Collaborated cross-functionally with product managers, designers, and QA teams in an agile environment, driving project milestones and improving time-to-market.

Championed the adoption of modern testing and UI consistency tools (Storybook, Jest, Cypress), improving frontend reliability and reducing production bugs.

Deployed applications in Azure, optimizing CI/CD workflows and leveraging Azure services for efficient, reliable releases and resource management.

Mindy Support

AI LLM Suporter

Limassol, Limassol, Cyprus

Jun 2024→ Mar 2025

Summary

Supported AI model development at Mindy Support by preparing high-quality datasets and collaborating with cross-functional teams for product integration.

Highlights

Collected, cleaned, and prepared large datasets required for training or fine-tuning language models, ensuring high quality and representativeness for optimal model performance.

Collaborated effectively with data scientists, software engineers, and product managers to successfully integrate AI models into products and services.

Provided technical support and expertise on the capabilities and limitations of large language models, guiding stakeholders in strategic decision-making.

Anda

Head of Information Technology

Luanda Province, Luanda, Angola

Aug 2024→ Jan 2025

Summary

Led IT operations and strategy for Anda, aligning technology with business objectives to enhance efficiency, security, and innovation.

Highlights

Developed and implemented comprehensive IT strategies, ensuring alignment with overarching business goals and identifying key opportunities for technological improvement.

Oversaw the design, implementation, and maintenance of critical IT systems and networks, guaranteeing high uptime, reliability, and scalability for all infrastructure.

Managed and mentored a high-performing IT team, fostering professional growth and efficient cross-functional collaboration to meet organizational needs.

Established and enforced robust IT security policies and compliance frameworks, safeguarding company data and systems against threats.

Negotiated vendor contracts and managed the IT budget effectively, optimizing resource allocation and achieving cost-effective solutions for hardware, software, and services.

Leadster

Senior Front-end Developer/Engineer | ReactJS

Curitiba, Paraná, Brazil

Feb 2023→ Apr 2024

Summary

Led the refactoring of Leadster's main Chat Platform, enhancing performance for +2K clients and +200K monthly users.

Highlights

Spearheaded the refactoring process of the main Chat Platform Application for Lead Generation, serving +2K clients and +200K monthly users, significantly improving performance and scalability.

Motivated the tech team through 5 presentations on IT and software development/maintainability, fostering a culture of continuous improvement and knowledge sharing.

Composed 100% of the new AI Assistant UI in close collaboration with the Design team, enhancing user engagement and interface aesthetics.

datasales

Mobile Software Developer/Engineer | React Native | Android | iOS

Campinas, São Paulo, Brazil

Feb 2022→ Feb 2023

Summary

Led a team of 5 software engineers to develop and implement mobile software infrastructure standards, improving best practices and CI/CD for datasales.

Highlights

Led a team of 5 software engineers (4 Fullstack/Mobile Developers, 1 QA) in developing and delivering robust mobile software solutions.

Established and implemented mobile software infrastructure standards, enhancing best practices and optimizing CI/CD processes.

Participated in planning and implementing new mobile features, resolving bugs, and preventing production errors to improve application stability.

Collaborated with a development team to idealize and construct software, developing and consuming services/APIs for products using JavaScript technologies (ReactJS, React Native, NodeJS/Serverless).

Created integrations with marketing tools such as Facebook, Instagram, Google Ads, and Google Analytics, enhancing data collection and campaign effectiveness.

DRY'C Studio, Consultoria e Serviços

Founder (Software Engineer / Product Designer / Consultant)

Belas, Luanda, Angola

Feb 2022→ Jan 2023

Summary

Founded DRY'C Studio, providing IT consulting services in digital marketing, software development, project management, and product design.

Highlights

Launched and grew a consulting firm, delivering strategic IT solutions across digital marketing, software development, project management, and UI/UX design.

Managed end-to-end project lifecycles, from client acquisition and requirements gathering to solution delivery and stakeholder management.

Developed and implemented custom software solutions and digital marketing strategies for clients, driving their business growth and operational efficiency.

Advised clients on product design and UI/UX best practices, enhancing user engagement and market competitiveness.

Field Right

Mobile Software Developer/Engineer | React Native | Android | iOS

São José, Santa Catarina, Brazil

Mar 2022→ Oct 2022

Summary

Consulted with Field Right to design and deliver new mobile software features, fix bugs, and improve app performance for a delivery platform.

Highlights

Consulted on the design and delivery of new software features for a delivery app, integrating payment methods and social network authentication (Facebook, Google).

Resolved existing bugs and optimized app performance, contributing to a smoother user experience and increased reliability.

Integrated third-party APIs (Geo, Maps) to enhance app functionality and user engagement.

Contributed to a platform connecting customers and clients for goods delivery, improving operational efficiency and user satisfaction.

Field Right

Frontend Software Developer/Engineer | ReactJS | NextJS

São José, Santa Catarina, Brazil

Mar 2022→ Sep 2022

Summary

Designed project architecture and led an agile development team for a delivery app, developing e-commerce modules and technical documentation.

Highlights

Designed the project architecture and initiated development of a delivery app from scratch, organizing an agile team for successful project execution.

Authored comprehensive technical documentation, ensuring clarity and maintainability for future development and team collaboration.

Implemented critical e-commerce modules, including payment methods and social network authentication (Facebook, Google), enhancing platform functionality.

Organized and managed the development team in an agile environment, optimizing workflow and project delivery timelines.

Field Right

UI Designer

São José, Santa Catarina, Brazil

Nov 2021→ Mar 2022

Summary

Designed and evaluated E-commerce layouts for Field Right, translating user requirements into visually appealing and functional designs.

Highlights

Gathered and assessed user requirements in collaboration with customers, translating needs into effective design solutions for E-commerce layouts.

Illustrated design ideas using process flows and site maps, creating detailed mockups and UI prototypes that clearly conveyed e-commerce functionality.

Prepared and presented design drafts to internal and external stakeholders, incorporating feedback to refine layouts.

Identified and resolved UX issues, including responsiveness, and made layout adjustments based on customer feedback to enhance user satisfaction.

Ensured adherence to style standards in fonts, colors, and images, maintaining brand consistency and visual appeal.

Interdigitos, Lda.

Agile Scrum Master

Luanda, Luanda, Angola

Sep 2021→ Feb 2022

Summary

Facilitated Scrum processes for the Interdigitos development team, improving self-organization, removing impediments, and promoting team discipline.

Highlights

Facilitated Scrum processes for the development team, improving self-organization and aligning development with project processes.

Removed impediments for the team, ensuring smooth workflow and timely project delivery.

Promoted team self-discipline and adherence to agile principles, enhancing overall team productivity and collaboration.

Interdigitos, Lda.

Frontend Developer/Engineer | ReactJS | ElectronJS

Belas, Luanda, Angola

Jun 2020→ Feb 2022

Summary

Developed user-centric web applications with ReactJS and ElectronJS for Interdigitos, creating key income-generating products.

Highlights

Responsible for the user experience of web applications within an Agile team, creating UI/UX for multiple web application interfaces.

Developed web application interfaces using ReactJS, NestJS, jQuery, JavaScript, Typescript, Bootstrap, CSS3 & HTML5 technologies.

Contributed to 3 main projects, one of which became the company's main income product, designed from scratch with the dev team.

Developed software for client document validation and authentication, streamlining critical business processes.

Implemented an OCR (Optical Character Recognition) system to digitize documents, improving data management efficiency.

Created 'SigarQ,' a Document Management System with a powerful search engine, managing logistics and document storage for enterprise clients.

Interdigitos, Lda.

Web Designer Assistant

Belas, Luanda, Angola

Mar 2020→ Feb 2022

Summary

Assisted in web design and development, creating prototypes, presentations, and maintaining web pages with UI/UX principles.

Highlights

Created prototypes and wireframes for web and desktop applications, enhancing visual communication and design clarity.

Designed project presentation layouts and maintained web pages, applying UI/UX principles to improve user engagement.

Developed front-end using JavaScript, jQuery, HTML5, and CSS3, ensuring responsive and visually appealing designs.

ANGOLA IT - INFORMATICA & SISTEMA LDA

Full Stack Software Developer | PHP | ReactJS

Belas, Talatona, Luanda, Angola

Feb 2018→ Feb 2019

Summary

Developed and maintained the 'YetuSchool' School Management Software for ANGOLA IT, managing finances and academics for 5 client institutions.

Highlights

Developed and maintained the 'YetuSchool' School Management Software using PHP, MySQL, JavaScript, ReactJS, jQuery, Bootstrap, CSS3, and HTML5.

Managed web application development projects, ensuring timely delivery and adherence to specifications.

Managed the institution's finances and academic sides, serving 5 clients with multiple institutions, improving operational efficiency and data management.

Education

IMPAL (High School)

, ,

Jan 2016→ Dec 2019

Technical Course Energy and Electrical Grade:

Languages

English

Spanish

Portuguese

Certificates

Introdução prática ao Figma

Online Course

Learn CSS Flexbox Practically

Online Course

Electron: Crie aplicativos Desktop com as tecnologias da Web

Online Course

Introdução ao TypeScript: Explorando Classes, Tipos e Interfaces

Online Course

Curso React.js Ninja: Módulo React + Webpack

Online Course

English

Feb 2024

NUST Namibia

UX Design

Mar 2023

Design Circuit

Software Development

Nov 2020

Digital Innovation One Inc.

Learning English, Spanish & French as a Second Language

May 2019

Kultivi

Skills

Frontend Development

ReactJS, NextJS, JavaScript, TypeScript, Styled-Components, Material UI, TailwindCSS, Ant Design, HTML5, CSS3, SASS, jQuery, Bootstrap, ElectronJS.

Mobile Development

React Native (iOS/Android), Kotlin, Swift, Objective C.

Backend Development

PHP, NodeJS, Python.

Databases

MySQL, Maria DB, Oracle DB, SQL Server, SQLite.

DevOps & Cloud

AWS (SQS, RDS, EC2, EKS, ECS, Lambda, S3), Heroku, Netlify, Bitbucket Pipelines, GitHub Actions, Circle CI, Google Play Console, App Store Connect, Azure, GCP.

Design & UI/UX

Figma, Wireframing, Prototyping, High-Fidelity Mockups, User Research, Usability Testing, Icon Design, Logo Design, Visual Assets, Design Systems, Component Libraries, Color Theory, Typography, Layout Design, Product Design, UI/UX Design, Industrial Design, Visual Design, Motion Design, Adobe XD, Adobe Illustrator, Adobe Photoshop.

Tools & Methodologies

Git, Bitbucket, GitLab, Jira Software, SourceTree, GitHub Desktop, Trello, Microsoft 365, Storybook, Docz, Jest, Cypress, Mocha, Enzyme, ViteJS, Rollup, Gulp, Gunt, Agile, Scrum.

IT Management

IT Strategy & Planning, Infrastructure & System Management, Team Leadership, Security & Compliance, Vendor & Budget Management, Technical Support & Troubleshooting, Information Technology Infrastructure, Odoo.

Interests

Design Disciplines

Product Design, UX/UI Design, Industrial Design, Visual Design, Motion Design.

Emerging Technologies

Finances for FinTech apps, Data Science.

Professional Development

Digital Marketing & Advertising, Interpersonal Communication Skills, Leadership and People Management.