Personal details
Andrei S.
Based in: 🇷🇴 Romania
Timezone: Bucharest (UTC+3)
Summary
Andrei is a senior software developer and ex-Microsoft engineer with 10+ years of experience developing web, desktop, mobile, and blockchain apps using Ruby, C#, and Javascript. His products brought $100M+ in total revenue and are used by dozens of millions of users to this day. Being a startup founder himself, Andrei knows exactly what brands need to succeed and how to bridge the gap between business and technology. He is here to help companies grow using the right software and tools.
Work Experience
Freelance CTO and Lead Developer for Startups
DX SOFTWARE | May 2018 - Present
Ruby
HTML/CSS
PHP
Python
Android
Java
C#
C++
SQL
Ruby on Rails
Django
Node.js
MySQL
Angular
WordPress
HTML
JSON
Database
API
Google Maps
PostgreSQL
Azure
Laravel
Google Analytics
Automation
Migration
Android Studio
TypeScript
Jira
Payment gateway
Firebase
Stripe
Front-End
Algorithm
Landing pages
Docker
Python 3
React
Google Cloud Platform
Leadership
Management
CSS
JavaScript
Back-End
CQRS
Rust
Kubernetes
React Native
Blockchain
Ethereum
GraphQL
Cryptocurrency
CTO
Payment systems
AWS Lambda
.NET Core
Solidity
.NET
FinTech
Agile
Next.js
ASP.NET
ASP.NET Web Forms
Payment Processing
QR Code
Figma
UI
RESTful API
NestJS
OpenAI
Python 2
Vue.js
Marketing strategies
Ecommerce support.
AWS (Amazon Web Services)
- Spearheaded a team of highly skilled developers and designers. Worked closely with the CEOs of small and medium-sized enterprises to devise software solutions to drive their business growth and success.
- Created the central system for WHS, used by the US Golf Association to calculate millions of golfers' handicaps worldwide. Used technologies like Ruby on Rails, React, PostgreSQL, and AWS. More info at https:/www.randa.org/WorldHandicapSystem.
- Built a personalized access management system for a Fortune 500 German corporation. It used Java and microservices to coordinate employee permissions seamlessly across multiple tools while improving the company's security.
- Created a unique booking website designed as a social platform where guests can reserve accommodations and share their travel stories with friends. The website was developed using React and Ruby on Rails and is hosted on Heroku.
- Developed a customized food ordering application for a large office complex in Bucharest, which included several nearby restaurants. The system had a PHP back end, a React Native mobile app, a WordPress website, and integration with an ERP system.
- Created ArtekaLabs' blockchain-based NFT collections powered by Ethereum/Polygon solidity and React/Web3.js. Learn more at https://www.artekalabs.com/.
- Built a members section for a blockchain startup that enables users to make purchases using their crypto wallet. Our team then converted it into a white-label SaaS using top-of-the-line technologies such as React, Node.js, AWS, and Ethereum.
- Led the creation of a mobile app that transformed a mid-sized company's sales team interactions. Our use of React, Node.js, and AWS resulted in up to 20% performance improvement for employees and up to 3% sales increase for the company.
Team Lead and Senior Full-stack Developer
A2ZPort LLC | Apr 2023 - Nov 2023
Python
Server
MongoDB
JSON
Database
API
Unit Testing
Testing
Selenium
GitHub
Amazon EC2
Maps
Web Scraping
Cloud
TypeScript
CRM
Front-End
Twilio
Web Development
System Administration
Stripe Payments
Orchestration
React
Dashboards
Code Review
Leadership
System Design
Software Design
Containerization
Circleci
Microservices
CTO
Payment systems
AWS Lambda
Software Quality Assurance
MVP Architecture
FinTech
Next.js
EDI
Payment Processing
Web Application
UI
Documentation Process
SCSS
Vercel
OOP Large Scale
Source code scanning
Software Architecture
Express.js
macOS
AWS (Amazon Web Services)
Distributed Systems Design
- Took ownership of the product and fixed critical bugs within the existing project setup, making the user's experience smooth and enjoyable.
- Hired a remote team of developers for the client. Led the new and old team members into building the project steadily, quickly meeting deadlines.
- Improved the DevOps setup of the project, reducing costs by 50%. Implemented an efficient CI/CD process that reduced the development time by 30% and removed risks of errors slipping into production.
- Maintained clear communication and expectations with a large number of stakeholders, saving crucial time and increasing the team's performance.
Education
Universitatea Politehnica Timisoara - Timisoara, Romania
Master's degree・Computer Software Engineering
Sep 2018 - Jul 2020
Universitatea Politehnica Timisoara - Timisoara, Romania
Bachelor's degree・Computer Software Engineering
Sep 2013 - Jun 2017
Personal Projects
The Volunteer
2019
Android
An Android application that tracks the activity of the volunteers in an organization, by allowing them to register and confirm their presence at different activities. Admins would see an activity report for each volunteer.
Crypto Chat
2017
Android
Firebase
An Android app similar to Messenger that allows users to chat with each other directly, or build rooms with multiple users. Each message can be encrypted using a special password and the receiver would only be able to decrypt the message if they know the password. Used Firebase for the back end.