O Efrain R

Senior Software Engineer

CoderPad

Oct 2025 - Current (1 year)

Backend Consultant

FamilySearch

Sep 2024 - Oct 2025 (1 year 2 months)

Full Stack Engineer

Fanatics

Nov 2023 - Jul 2025 (1 year 9 months)

Full Stack Engineer

Ballast Lane Applications, LLC

Sep 2022 - Nov 2023 (1 year 3 months)

Full Stack Engineer

[untitled]

Mar 2022 - Aug 2022 (6 months)

T

Full Stack Engineer

TeamStation AI Careers

Jul 2021 - Mar 2022 (9 months)

Worked as Full Stack Engineer for different clients with needs on Python (Django) & React.

Full Stack Engineer

NerdWallet

Dec 2020 - Jul 2021 (8 months)

Contractor focused to provide Software Solutions to NerdWallet, and more concrete to the Offer Comparison team. My responsibilities are from maintenance of existing applications, to create new solutions or improve methodologies, patterns, architecture, and collaboration with both Product and Design. Tech stack: React, TypeScript, Python, Flask, GraphQL, NGINX, Kibana, New Relic, Go.

S

Senior Software Engineering Consultant

May 2020 - Dec 2020 (8 months)

Focused on back-end development for the node platform using technologies like TypeScript, Apollo, GraphQL, Nest, React, React Native among others.

Full Stack Engineer

NextRoll

Nov 2019 - May 2020 (7 months)

Member of the WebApp team, designing and implementing solutions for different projects in the company related to customer-facing projects in both front and back ends. Also collaborate with some Core Components of the company, so other projects can benefit from them. Tech stack: - Python - Flask - PostgreSQL - React - Redux (with thunk, or sagas) - Sass - JavaScript - Typescript - Flow

Full Stack Engineer | Front End Team Responsible

NextRoll

Jan 2019 - Nov 2019 (11 months)

Proud member of the Attribution team. My main responsibility is the front-end part of the Attribution Team, but I'm not limited to work on other parts of the project like the API, Data Transferring, or even the back-end jobs. Working with a variety of technologies: - React - Redux - Flow - ES6 - Docker - Python - Flask - SQLAlchemy - Alembic - Redis - PostgreSQL - Bootstrap

Sr. Software Engineer

1A Auto

Nov 2013 - Jan 2019 (5 years 3 months)

Application analysis, design, and development responsible for internal customers using a variety of technologies such as Spring DI, Spring MVC, Spring JdbcTemplate, StringTemplate, Drools, PHP, MySQL, MS SQL Server, and others.

Project Leader

Grupo Empresarial EISEI

Apr 2013 - Nov 2013 (8 months)

Responsible for the technical management of the team, and the evaluation of the feasibility for the customer requirements in terms of time. I also need to keep my team motivated, so we can make our deliverables on time and pursuing a whole FTR project.

Software developer

Grupo Empresarial EISEI

Feb 2013 - Apr 2013 (3 months)

Responsible for the building and design of enterprise web applications for the Java platform. Technologies used BC4J, Struts 1, Servlets 2, JSP, Oracle along side others.

Java developer

Softtek

Aug 2012 - Feb 2013 (7 months)

For this job I used my skills to solve problems, often I used Java but I wasn't certainly limited to it. I also attended meetings with the customers to take requirements up and to confirm their user experience was just what they wanted.

R

Software analyst and developer

Rally Sin Fin

Nov 2010 - Aug 2012 (1 year 10 months)

In this company was needed to apply my problem solving skills for the creation of a web platform. The technologies for the projecs in this company were: Java, Play Framework, Python, Linux, MySQL, and Lighttpd.

B

Software developer

Bussiness & Quality Consulting

Jan 2010 - Nov 2010 (11 months)

When I worked for this company I was also in the middle of my university studies. I really learnt so much being here. In this company I helped testing and modifying a web application able to handle every process needed for quality standards such as ISO 9001:2008, just to mention the most common. The technologies required by this company and project are: Java, Struts 1.x, Hibernate, Spring, Subversion, Tomcat, PostgreSQL, and Linux.

S

Software developer

Sistemas de Control Electronico

Jan 2009 - Jan 2010 (1 year 1 month)

One of the best companies you can work in! After my 2 years college degree I had the opportunity to work for this great company. It was something very exciting and challenging. I worked developing different applications using the available technologies in the .NET platform, technologies like C#, .NET Compact Framework, and others. For those projects was also needed my skills using databases systems like MySQL and MS SQL Server 2005. I developed web-service consuming mobile applications for Windows Mobile 5 and 6, and I also developed desktop applications.

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O Efrain R

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