Alejandro Rey Juarez Hernandez

5.0

(3 reviews)

US$15.00

For every 15 mins

Sessions/Jobs

ABOUT ME

Senior Software Engineer | Full-Stack Developer

As a seasoned Senior Software Engineer, I bring a wealth of experience in full-stack development, with a strong focus on front-end technologies and quality assurance. I offer mentoring and consulting services in the following areas:

React.JS & Angular: Proficient in building dynamic, responsive web applications using React.JS and Angular. I can guide you through best practices, performance optimization, and advanced component design.

CSS: Expertise in CSS for crafting visually appealing and responsive user interfaces. I can help you master layout techniques, animations, and styling frameworks.

Unit Testing: Specializing in unit testing with Jasmine/Jest for JavaScript and JaCoCo for Java. I can assist you in setting up comprehensive test suites, writing effective test cases, and achieving high code coverage.

Playwright Automation Scripts: Experienced in writing robust automation scripts using Playwright. I can teach you how to automate end-to-end testing, ensuring your applications perform flawlessly across different browsers and devices.

With a commitment to high-quality code and efficient workflows, I aim to help you enhance your skills and achieve your project goals. Whether you're looking to improve your existing codebase or start a new project from scratch, I'm here to provide expert guidance and support.

Spanish, English

Tijuana (-08:00)

Joined June 2022

EXPERTISE

JavaScript

5 years experience

I began my professional career as a front-end developer, gaining a strong foundation in JavaScript. Over the years, I have honed my skill...

I began my professional career as a front-end developer, gaining a strong foundation in JavaScript. Over the years, I have honed my skills in building dynamic, responsive web applications and have deep expertise in modern JavaScript frameworks and libraries. My experience encompasses creating efficient, maintainable code and implementing best practices to ensure optimal performance and user experience.

TypeScript Node.js React Angular

Unit Testing

4 years experience

Mocking code and functionality is my passion. I've learned my way around TDD & unit testing as I consider of high importance to have well...

Mocking code and functionality is my passion. I've learned my way around TDD & unit testing as I consider of high importance to have well tested code and ensure every crazy scenario is covered in order to minimize all foreseeable bug scenario.

Karma jasmineJUnit Jest

Karma jasmineJUnit Jest React Java Kotlin TypeScript JavaScript

Web Development

5 years experience

5+ years of experience in Web Apps/APIs using AWS Lamba, S3, SQS, SNS, API Gateway, Secrets Manager, EC2 & EKS. Developed microservices ...

5+ years of experience in Web Apps/APIs using AWS Lamba, S3, SQS, SNS, API Gateway, Secrets Manager, EC2 & EKS. Developed microservices that serve resources to UI applications using REST APIs using frameworks like Sprint Boot as well with technologies such as Java, Kotlin & Express JS.

RESTful API Express.js Apache HTTP Server

RESTful API Express.js Apache HTTP Server AWS Kotlin Java Spring Boot Docker Kubernetes

Playwright for JavaScript

2 years experience

I have extensive experience using Playwright as an integral part of our QA process to ensure all features function correctly with every r...

I have extensive experience using Playwright as an integral part of our QA process to ensure all features function correctly with every release cycle and during scheduled sanity checks. My approach emphasizes writing clean and readable code to facilitate easy script maintainability and ensure long-term reliability of our automated testing framework.

REVIEWS FROM CLIENTS

5.0

(3 reviews)

Doug Jay

July 2022

Alejandro is very knowledgable and great to deal with, would recommend and use again

Doug Jay

June 2022

Alejandro was super helpful, would recommend and use again

SOCIAL PRESENCE

GitHub

md-blog

Personal MD Blog

JavaScript

Stack Overflow

11 Reputation

EMPLOYMENTS

Sr Software Engineer

Thermo Fisher Scientific

2021-11-01-Present

Support Customer Identity & Access Management initiative accross Thermo Fisher's B2B and B2C eCommerce and scientific platforms along wit...

Support Customer Identity & Access Management initiative accross Thermo Fisher's B2B and B2C eCommerce and scientific platforms along with Supply Chain.

Java

SQL

React

Java

SQL

React

Spring Boot

JavaScript

Splunk

Kubernetes

Software Engineer

ITJuana

2020-12-01-2021-10-01

Development of Web App/API which improved company's Tech Support department's review/monitoring process of customer's biometrics. Inform...

Development of Web App/API which improved company's Tech Support department's review/monitoring process of customer's biometrics. Information/record handling done through data tables & diagrams as part of an Angular based project. Data is served through a REST API with SpringBoot (Kotlin). UI & REST API hosted in GCP App Engine.

Angular

TypeScript

Google Cloud Platform

Angular

TypeScript

Google Cloud Platform

Kotlin

Kubernetes

Software Engineer II

Thermo Fisher Scientific

2018-05-01-2020-12-01

Develop and support functionality to meet needs for ThermoFisher.com Customer Identity Access Management (CIAM) platform. • Re-designed ...

Develop and support functionality to meet needs for ThermoFisher.com Customer Identity Access Management (CIAM) platform. • Re-designed UI for ThermoFisher.com B2C User Registration & Reset Password. • Developed new microservice based backend services for ThermoFisher.com B2C User Registration & Reset Password processes. • Support on Legacy B2C User Registration system

Java

SQL

Angular

Java

SQL

Angular

TypeScript

Spring Boot

Splunk