William Ferreira
Florianopolis, Brazil

Software developer by trade with 3+ years of professional experience, with strong focus in back-end development.

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CodersRank Rank
Top 3%
Highest experience points: 0 points,

0 activities in the last year

List your work history, including any contracts or internships
Jul 2022 - Oct 2022 (3 months)
Backend Developer
• Build and maintain RESTful APIs (both internal and public);
• Write automated tests and improve overall code quality;
• Work alongside the PO to determine priorities and deadlines;
• Volunteered to help the QA team by doing some of their tasks;
• Technologies used: Java 8, Spring Boot, AngularJS, MySQL 8, JUnit 4, Postman, Linux.
java 8 javascript mysql 8 postman rest api swagger AngularJS javascript spring boot junit nvim
Aug 2021 - Aug 2022 (1 year)
Backend Developer
• Worked alongside the CEO to implement new features, from analysis and design to execution and maintenance;
• Implemented novel calculations methods generically, anticipating production launch by several months, giving the company an edge
over their competitors;
• Implemented PIX (Brazilian electronic payment system) for the company’s in-house payment gateway, with the objective of com-
pletely replacing the traditional billing system;
• Built a PDF scraper, making heavy use of regex, to extract benefit data from the lawyers’ clients, to ease the registration process, as
well as building a data lake for future use;
• Quickly adapted to new responsibilities when the entire back-end team disbanded shortly after I joined the company;
• Technologies used: Java 11, Gradle, Google Guice, Docker, AWS (ECS, S3, RDS, Lambda, CW), Postman, JUnit 5, MySQL 5.7 and 8,
Docker, Redis, Linux.
aws docker java 11 gradle google guice postman junit mysql redis linux bash nvim javascript
2 years
Florianópolis, Brazil
Software Developer
Jan 2020 - Aug 2021 (1 year 7 months)
• Made significant contributions to almost all products in the department, from pension funds management systems, loans systems,
election systems, automation jobs, Docusign integrations, among other things;
• Mentored two Junior Developers to get them up to speed with the tech stack and business;
• Worked alongside actuaries to implement a complex registration fee technique for one of the clients;
• Considered a reference for my colleagues towards the end of my tenure there;
• Technologies used: Java 8, Spring Boot, Maven, Angular 9, JSP, JavaScript, Postman, MySQL.
typescript javascript java 8 jsp spring boot Angular postman mysql bash
Support Analyst
Aug 2019 - Jan 2020 (5 months)
• Diagnosed technical issues for 20 clients (private pension funds) by phone, email or chat;
• Fixed bugs, deployed smaller features;
• Ticket escalation to dev teams dropped significantly during my time there;
• Tracked down and fixed a major bug that went unnoticed for years for one of the clients, avoiding a possible lawsuit against the company.
bash sql javascript
Add some compelling projects here to demonstrate your experience
Reborn Fighters (3D fighting game)
Feb 2022 - Present
Joined the ongoing project to help set up the server doing an assortment of tasks, such as: web
scraping, automated translation, web development, configuring the database, automating backups,
configuring TCP BBR on the server to improve network performance.
java typescript mysql bash tmux nginx Angular NestJS nvim prisma railway.app gcp python selenium
This section lets you add any degrees or diplomas you have earned.
Udesc Esag
Bachelor's degree, Economics (Incomplete)
Jan 2018 - Jan 2022
Instituto Federal Catarinense - Campus Araquari
Trades, Information Technology
Jan 2011 - Jan 2014

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