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Iustinian-David – Node.js, Typescript, Solidity, experts in Lemon.io

Iustinian-David

From Romania (GMT+3)

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Full-stack Web DeveloperSenior
Blockchain EngineerStrong senior
Hire developer
6 years of commercial experience
AI
Blockchain
E-learning
Edtech
Logistics
Networking
Platforms
Gaming software
Lemon.io stats
1
projects done
240
hours worked
Open
to new offers

Iustinian-David – Node.js, Typescript, Solidity

David possesses extensive experience in software development with diverse expertise across multiple programming languages and technologies, spanning from React to Node.js, with a strong proficiency in blockchain technology. His extensive experience and deep understanding of blockchain and computer science qualify him for Strong Senior Blockchain Developer roles. Moreover, as a co-founder of two startups, David has demonstrated his ability to shape projects from scratch, contributing at various levels and driving innovation to deliver impactful tech solutions.

Main technologies
Node.js
6 years
Typescript
6 years
Solidity
5 years
React
6 years
Additional skills
Next.js
Python
Django
Ethereum
Angular
AWS
OpenAI
Golang
GraphQL
Apache Kafka
Docker
Blockchain
C#
Java
C++
MongoDB
MySQL
Redis
Hasura
Nest.js
Vercel
PostgreSQL
Ready to start
To be verified
Direct hire
Potentially possible

Experience Highlights

Co-Founder, Senior Full-stack Developer
Nov 2020 - Ongoing3 years 6 months
Project Overview

It's an ambitious venture within the realm of blockchain-based MMORPGs. This project immerses players in a meticulously crafted, player-driven fantasy universe.

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Responsibilities:
  • Designed and developed the core Blockchain functionality;
  • Implemented security features in smart contracts and ensured secure off-chain interactions;
  • Designed intuitive UI and optimized the user experience to encourage adoption;
  • Optimized smart contracts and transaction processing to reduce gas consumption, making the system more cost-effective for users;
  • Conducted testing, code reviews, and quality checks.
Project Tech stack:
Solidity
Blockchain
Golang
C#
Unity
Python
Typescript
Angular
React
Nest.js
Java
Docker
Next.js
MySQL
MongoDB
Redis
Co-Founder, Senior Full-stack Developer
Mar 2020 - Ongoing4 years 2 months
Project Overview

It's an educational platform tailored for Romanian students preparing for the "baccalaureate" exam.

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Responsibilities:
  • Spearheaded the conceptualization and launch of the platform, including identification of the project's objectives, definition of its scope, and formulation of a strategy;
  • Coordinated the efforts of the development team members, being a Team Lead;
  • Integrated an AI-powered chatbot that enhanced user engagement and provided personalized academic assistance;
  • Designed, developed, and optimized the front-end and back-end architecture;
  • Created user-friendly interfaces and robust server-side components.
Project Tech stack:
Angular
Typescript
Nest.js
OpenAI
Docker
MongoDB
MySQL
Next.js
Senior Full-stack Developer
Mar 2023 - Jul 20234 months
Project Overview

It's a delivery management system designed for electric vehicle fleets managing high parcel volumes from many sources.

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Responsibilities:
  • Took charge of implementation of new functionality;
  • Refactored existing code to improve its efficiency and maintainability;
  • Introduced features, including a robust data handling system and an aggregation feature;
  • Integrated AI components that empowered the platform to make data-driven decisions, optimize routes, and enhance the overall efficiency of parcel handling;
  • Wrote unit tests;
  • Provided technical guidance to the team members.
Project Tech stack:
Typescript
Nest.js
React
GraphQL
Python
OpenAI
Apache Kafka
Docker
Golang
MySQL
Hasura
Next.js
MongoDB
Software Developer
Feb 2018 - Jun 20224 years 4 months
Project Overview

It's two projects for Lenovo. One provides a reliable, open, and programmable network infrastructure designed to scale for any business needs. Another one provides a single interface to monitor and manage resource managers and the devices that are managed through those resource managers.

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Responsibilities:
  • Wrote code that collected and processed telemetry data from networking devices;
  • Applied ML algorithms and approaches that helped identify anomalies and improve the overall efficiency and reliability of the networking system;
  • Worked with data streams and analyzed network performance metrics;
  • Designed user interfaces;
  • Implemented application logic;
  • Developed server-side components.
Project Tech stack:
Python
C
C++
Assembler
Typescript
Node.js
Angular
Bash
Java
Docker
Redis
MongoDB
MySQL

Education

2022
Computer Science
Master

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