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Stavros – JavaScript, Node.js, React, experts in Lemon.io

Stavros

From Greece (GMT+3)

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Full-stack Web DeveloperMiddle
Hire developer
11 years of commercial experience
Accounting
Business intelligence
Cryptocurrency
Information services
Dev tools
Embedded software
Enterprise software
SaaS
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Stavros – JavaScript, Node.js, React

Stavros has over 9 years of development experience, including a search engine rebuild and work in the IT department of Greece's Supreme College for National Defense. He also has a cybersecurity background, which was the focus of his master's degree. Stavros is an outgoing developer who would be a valuable addition to teams across various domains!

Main technologies
JavaScript
5 years
Node.js
3 years
React
1 year
Additional skills
Vue.js
C#
Python
HTML
SQL
Firebase
Stripe API
DevOps
CSS
Ready to start
ASAP
Direct hire
Potentially possible

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Experience Highlights

Freelancer
Jan 2021 - Ongoing3 years 8 months
Project Overview

Building software for enterprise customers.

  • Foreclosure management
  • News crawler reporting - keeping the client informed on what is said about them
  • Boat renting - booking sailing trips online
  • Boilerplate SaaS
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Responsibilities:

The developer had a wide range of responsibilities: everything from communication with clients to designing and building the apps.

  • Designing the UI/UX of the app
  • The architecture of the app
  • Frontend implementation
  • Backend implementation
  • Testing the app
  • Deploying the app
  • Managing servers or server infrastructure depending on the project
Project Tech stack:
Vue.js
React
React Native
Python
Firebase
Strapi
Stripe API
Tailwind CSS
Jenkins
Cypress
GraphQL
SQL
NoSQL
Node.js
Express.js
PostgreSQL
Engineering Manager
Aug 2020 - Jan 20215 months
Project Overview

SaaS web application connecting companies' bookkeeping data with the Greek tax authorities.

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Responsibilities:

Managed a team of 10 software engineers on building a SaaS web application that connects bookkeeping data with the Greek tax authorities. This application is being used by Greece's largest companies like Deloitte, the national water supply company (EYDAP), major insurance companies, and others.

Project Tech stack:
Jira
Full-stack developer
Jan 2019 - Aug 20201 year 6 months
Project Overview

Worked as part of IBM's Chief Information Office where his team was responsible for redesigning and rebuilding a search engine used by 210k Business Partners. The initial search engine was 500k lines of Java with millions of database rows constituting tens of services. The team rearchitected the whole system design, rethought the user experience, and implemented the search engine from scratch using modern technologies and Agile practices.

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Responsibilities:
  • Designed the architecture
  • Wrote many frontend components
  • Wrote a lot of business logic javascript in the backend
  • Wrote many backend API endpoints and setup graphql
  • Wrote many tests
  • DevOps tasks and IBM cloud server management
  • most security-related tasks
  • Code reviews
  • Mentored junior developers
  • Pushed code to IBM's Carbon design system
Project Tech stack:
Vue.js
Express.js
Java
JavaScript
Node.js
SQL
Express.js
Java
JavaScript
GraphQL
Cypress
Jenkins
Node.js
SQL
Software Engineer
May 2017 - Jan 20191 year 8 months
Project Overview

The company built hardware modules that wanted their firmware to be signed in the production line as well as a company generic API for doing crypto operations

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Responsibilities:

Developed the company's cryptographic API that is used for signing the firmware of thousands of hardware modules for Secure Boot at the manufacturing stage, as well as for any cryptographic operation by the company's software engineers.

• Cryptography (RSA, ECDSA, AES), encryption/decryption, signing

• Built the service: API design, database design, user & permission's system, tools to issue and distribute client certificates to users, server backup and replication mechanism, web UI for administrators

• Scaled the service to 300 requests/sec and protected it against attacks like SQL injections, XSS, and CSRF

Project Tech stack:
C#
SQL
PostgreSQL
SQLite
Docker
AWS
Jenkins
JavaScript
HTML
CSS
Perl
C

Education

2014
Computer Science
Bachelor's
2016
Information Security
Master’s

Languages

English
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