Daniel Xavier

Florianópolis, Santa Catarina, Brazil

dxdanielxavier@gmail.com
+55 31 99732-5804
linkedin.com/in/danieljxavier
danielxavier.dev

Summary

Skills

Experience

Senior Front-End Engineer | Tech Lead @ <DanielXavier /> (05-2024 to present)
A contractor role where I have been working on some independent client projects:
- Launched Lovevery's ERC to reach more than 455k customers;
- Built new Lovevery's checkout with a net gain of 7.3 checkouts per day, supporting 4 countries and 5 languages, and improving the code coverage by more than 20%;
- Led the Design System project at YES Technology (German-owned company), implementing components to support the whole company ecosystem, keeping a maintainable and scalable codebase, very well aligned with the company's brand and design principles;
- Main stack: React | Next.js | Tailwind CSS | HTML5 | CSS3 | TypeScript | JavaScript | Node.js | Jest | Cypress | Playwright | Contentful | Stripe | Docker | Vercel
Post-graduation professor @ PDSAcademy (06-2025 to 06-2025)
A short-term contract role where I teach Front-End development:
- Recorded more than 16 hours of Front-End Fundamentals with React classes;
- Did live sessions to support students with their doubts and share some tips to improve their learning;
- Created base projects and shared with students to practice the concepts learned;
- Main stack: React | Next.js | Tailwind CSS | HTML5 | CSS3 | JavaScript | Functional Programming
Technical Lead @ OLX (08-2021 to 04-2024)
A tech leader role where I was responsible for different core teams:
- Launched the new Ad Insertion journey in stages, giving users a fluid and easier experience to sell items in the classified platform;
- Published a new LTR ranking algorithm that brings 10% more conversion in the Ad Recommendation system;
- Led the new platform home page initiative, created in less than 48 hours, supported by the Design System;
- 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 | Amazon Web Services (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)
I held the position of CTO and co-founder at the startup:
- Defined the startup's technical vision and product strategy;
- Refined the product's technical specifications with the Product Team;
- Developed the solution from the ground up and delivered it to 4 new clients;
- Launched the MVP platform;
- Main stack: HTML5 | CSS3 | JavaScript | Google Cloud Platform (GCP) | BPMN
Team Leader @ Softplan (10-2020 to 07-2021)
A multidisciplinary team leader role where I was responsible for the team results:
- 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 | Amazon Web Services (AWS) | SQL Server | Delphi
Technical Lead @ Softplan (09-2019 to 10-2020)
A tech leader position (80% tech / 20% people) where I was responsible for the Front-End best practices:
- 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 | Amazon Web Services (AWS) | SQL Server
Senior Front-End Engineer @ Softplan (12-2018 to 08-2019)
A pure hands-on position where I was responsible for doing all of my team's Front-End deliveries:
- Successful 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 | Amazon Web Services (AWS) | SQL Server
Senior Full-Stack Engineer @ Hotmart (06-2018 to 11-2018)
A pure hands-on position where I was responsible for doing all of my team's full-stack deliveries:
- 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 | Amazon Web Services (AWS) | MySQL
Mid Level Front-End Engineer @ Hotmart (06-2017 to 05-2018)
A pure hands-on position where I was responsible for doing some of my team's full-stack deliveries:
- 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 | PHP | WordPress | Nginx | Amazon Web Services (AWS) | MySQL
Entry Level Front-End Engineer @ Hotmart (12-2016 to 05-2017)
I was an Entry Level Front-End developer on the "User Acquisition" team:
- 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 | Amazon Web Services (AWS) | MySQL
Support Analyst @ Sydle (04-2014 to 11-2016)
I was a Support Analyst on the "Suporte & Sustentação" team:
- Spearheaded the development of web projects utilizing WordPress and Magento;
- Facilitated 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: HTML5 | CSS3 | Angular | JavaScript | Node.js | Express | LoopBack | PHP | WordPress | Magento | Apache | Linux Servers | Windows Servers | Amazon Web Services (AWS) | MySQL | SQL Server | Oracle | BPMN
Support Associate @ Sydle (04-2012 to 03-2014)
I was a Support Associate on the "Suporte & Sustentação" team:
- 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 | Linux Servers | Windows Servers | Amazon Web Services (AWS) | SQL Server | Oracle | BPMN
... and other previous roles

Education

Master of Business Administration - MBA, Strategic People Management (2021)
Estácio
Bachelor, Computer Science (2014)
Universidade FUMEC