Daniel Xavier
Florianópolis, Santa Catarina, Brazil
- dxdanielxavier@gmail.com
- +55 31 99732-5804
- linkedin.com/in/danieljxavier
- danielxavier.dev
Summary
Skills
- React
- Next.js
- Tailwind CSS
- HTML5
- CSS3
- Vue.js
- Nuxt.js
- Angular
- Responsive Design
- SEO
- SSR
- Sass
- Semantical HTML
- Webpack
- Redux
- jQuery
- Web Accessibility
- Core Web Vitals
- Web Performance
- Web Security
- Web Sockets
- Styled Components
- PWA
- Storybook
- Micro Frontends
- TypeScript
- JavaScript
- MERN stack
- MACH architecture
- Node.js
- Nest.js
- Express
- LoopBack
- Meteor
- Kong
- Python
- .NET
- Unit tests
- Jest
- Code Coverage
- React Testing Library
- Cypress
- Chromatic
- Playwright
- HTTP
- GraphQL
- REST
- Contentful
- PHP
- WordPress
- Magento
- Laravel
- Nginx
- Apache
- Linux Servers
- Windows Servers
- Stripe
- CI/CD
- GitHub Actions
- Bash
- Docker
- YML
- AWS
- GCP
- Amazon EC2 - Cloud Compute Capacity
- AWS RDS (Relational Database Service)
- Amazon S3 - Cloud Object Storage
- AWS Lambda
- Amazon CloudFront - Content Delivery Network
- Kubernets
- Terraform
- Vercel
- SQL
- MySQL
- SQL Server
- PostgreSQL
- Oracle
- NoSQL
- MongoDB
- Jira
- Confluence
- Slack Workflows
- Slack Apps
- BPMN
- Git
- A/B Testing
- Atomic Design
- Design Systems
- Semantic Versioning
- UI/UX
- Google Ad Manager
- Agile
- Scrum
- Kanban
- Native Android
- Java
- Kotlin
- Native iOS
- SwiftUI
- React Native
- Firebase
- Functional Programming
- OOP
- Regular Expressions
- MarkDown
- Elasticsearh
- Delphi
- Leadership
- Communication
- Problem Solving
- Decision Making
- Empathy
- Conflict Resolution
- Adaptability
- Time Management
- Organization
- Strategic Thinking
- Mentoring
- Negotiation
- Resilience
- Critical Thinking
- Creativity
- Active Listening
- Team Building
- Ethical Decision Making
- Customer Orientation
- Stakeholder Management
- Learning Agility
- Curiosity
- Patience
- Public Speaking
- Networking
- Multitasking
- Attention to Detail
- Motivation
- Persuasion
- Emotional Intelligence
Experience
Senior Front-End Engineer @ Lovevery (07-2024 to present)
- Reduced front-end build time by 95% (40s → 2s) through deep refactoring and dependency optimization, accelerating CI/CD pipelines and developer iteration speed;
- Built a new Stripe-powered checkout experience supporting 4 countries and 5 languages, resulting in a net gain of +7.3 checkouts/day and 20% higher test coverage;
- Launched the ERC product journey that reached 455K+ new customers in just a few months, helping scale Lovevery's ecommerce reach and conversion funnel.
Main stack: React | Next.js | Tailwind CSS | TypeScript | Jest | React Testing Library | Cypress | Playwright | Contentful | Stripe | Vercel
Engineering Manager @ OLX (08-2021 to 04-2024)
- Launched the new Ad Insertion experience, increasing ad posting conversions and simplifying the selling process for millions of users;
- Shipped a machine learning-powered LTR algorithm that boosted ad recommendation engagement by 10%;
- Delivered a brand new homepage in under 48 hours, supported by the Design System, to accelerate validation and rollout;
- Made some advertising improvements to the platform that generated revenue of R$80 million;
- Recruited new professionals to increase production capacity by 300%, and be able to focus on the functionalities of the mobile application.
Main stack: React | HTML5 | CSS3 | Storybook | JavaScript | Node.js | Python | AWS | Amazon S3 - Cloud Object Storage | PostgreSQL | Google Ad Manager | Native Android | Java | Kotlin | Native iOS | SwiftUI | React Native | Firebase | Elasticsearh
CTO & Partner @ Meaning (03-2022 to 05-2023)
- Defined the technical vision and product roadmap from scratch, translating the company's business goals into an executable engineering strategy;
- Collaborated directly with founders and product stakeholders to iterate rapidly and align technical direction with customer feedback;
- Built and launched the MVP platform, acquiring 4 clients within the first months and establishing scalable cloud infrastructure on GCP.
Main stack: HTML5 | CSS3 | JavaScript | GCP | BPMN
Team Leader @ Softplan (10-2020 to 07-2021)
- Directly led a multidisciplinary software development team of 28 people including Developers, Quality Assurance analysts, Product Owners, Business Analysts, and Agile Masters;
- Made bi-weekly 1:1s to help the devs with the technical challenges, to help the QAs integrate their tasks with the team process flows, avoid creating bottlenecks and develop new automation test approaches, and the PO/BAs to handle the customer's urgent needs;
- Also guided the agile masters to structure and continuously enhance the team's workflow using agile software development methodologies;
- Planned and executed deliveries for the most 2 critical modules of the core system;
- Created formulas and metrics to accurately gauge the team's capacity, and sprint velocity, thereby bringing predictability to deliveries.
Main stack: React | Micro Frontends | .NET | GraphQL | AWS | SQL Server | Delphi
Technical Lead @ Softplan (09-2019 to 10-2020)
- Developed some Front-End modules for the new core system, constructed using React and a Micro Frontend approach;
- Handled for the code reviews, deliveries, and deployment of 17 modules of the system;
- Formed the Delphi developers team up to work with HTML, CSS, JavaScript, React, GraphQL, and unit tests;
- Led a team of 10 Front-End developers, doing weekly 1:1s, and partnering with their coordinators to do career plans;
- Hired tons of new employees for the company and new contractor professionals aligned with our development culture.
Main stack: React | Micro Frontends | .NET | GraphQL | AWS | SQL Server
Senior Front-End Engineer @ Softplan (12-2018 to 08-2019)
- Successfully delivered the team's most critical and complex project in less than 6 months, helping the Product Owner improve some features;
- Developed new features for the public portal helping attorneys in their jobs;
- Created new features for the core system helping tons of law professionals in their work.
Main stack: React | Micro Frontends | .NET | GraphQL | AWS | SQL Server
Senior Full-Stack Engineer @ Hotmart (06-2018 to 11-2018)
- Designed and implemented a system to address the company's internal needs and automate tasks, using Vue.js/Nuxt.js for the user interface, Node.js/Express for the data requests, and MySQL for storing data, that brought more than 1000 new leads for the commercial team;
- Created a Proof of Concept (POC) interface, only using JavaScript and HTML, that introduced a very simplified method for product registration on the platform (our main bottleneck).
Main stack: HTML5 | CSS3 | Vue.js | Nuxt.js | JavaScript | Node.js | Express | AWS | MySQL
Mid Level Front-End Engineer @ Hotmart (06-2017 to 05-2018)
- Designed from scratch a system to generate blog post images using components and pre-defined templates, using Vue.js/Nuxt.js for the interface, and Node.js for the assets API, thereby enhancing the productivity of the design team by 1000%;
- Created a high-performance caching system for the "Hotmart blog" (WordPress), using only some Nginx configs and PHP hooks, which resulted in a 300% increase in performance;
- Implemented the Arabic version of the "Hotmart blog" using pure CSS.
Main stack: HTML5 | CSS3 | Vue.js | Nuxt.js | JavaScript | Node.js | Express | PHP | WordPress | Nginx | AWS | MySQL
Entry Level Front-End Engineer @ Hotmart (12-2016 to 05-2017)
- Developed a new WordPress theme for the "Hotmart blog" utilizing only HTML5, CSS Grid Layout, and Vanilla JS;
- Implemented the new layout for the "Hotmart blog";
- Created custom features within the WordPress admin interface.
Main stack: HTML5 | CSS3 | JavaScript | PHP | WordPress | Nginx | AWS | MySQL
Support Analyst @ Sydle (04-2014 to 11-2016)
- Led the development of new web projects with WordPress and Magento;
- Added new features to a plataform built in Angular, Express and MySQL;
- Updated the modeling and automation of the company's internal processes through BPMN;
- Provided comprehensive technical support to users of the company's systems;
- Oversaw the configuration and monitoring of both Linux and Windows servers.
Main stack: Angular | Node.js | Express | PHP | WordPress | Magento | MySQL | BPMN
Support Associate @ Sydle (04-2012 to 03-2014)
- Provided technical support to users of the company's systems;
- Configured and monitored infrastructure on Linux and Windows servers;
- Compiled team reports;
- Offered infrastructure support to the company's employees.
Main stack: JavaScript | Apache | Linux Servers | Windows Servers | AWS
- ... and other previous roles
Education
MBA, Strategic People Management (2021)
Estácio
Bachelor, Computer Science (2014)
Universidade FUMEC
Languages
Portuguese (Native)
English (C1)
Spanish (B1)