Summary
Overview
Work History
Education
Skills
Job Reference
Certification
Timeline
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Sebastián Nielsen

Sebastián Nielsen

Blockchain And Backend Engineer
San Carlos De Bariloche -,Argentina

Summary

I have acquired excellent programming skills, knowledge of blockchain protocols, strong analytical abilities, and effective communication skills, knowledge how to develop and secure digital transactions by creating systems to record and store blockchain data in a way that prevents changes or hacks. My design capabilities allow for secure blockchain technologies. Further, I have been involved in developing application features and interfaces and maintain client and server-side applications.

Overview

6
6
years of professional experience
2
2
Certifications

Work History

Golang and Hyperledger Developer

United Airlines
10.2022 - 04.2023
  • Creation of Golang Core Gateway, Rule Engine for Egifts
  • Egift system with hyperledger interaction.

Blockchain Architect

Bosonic
11.2021 - 07.2022
  • Creation of Ethereum PowPeg system on RSK technology for USD bank interaction with BTC and ETH
  • Worked with Node.js, typescript and 2way-peg Rsk Native system.

Test machine creation on node.js techonolgy

4Logic
03.2022 - 06.2022
  • Development of a testing tool to detect security vulnerabilities on Smart Contracts and automated test creation tool, using ethereum security tools.

CTO and Blockchain Architect

Lothal
07.2021
  • NFT creation system on ERC721 Standards
  • Created NFT for the Inter-American Press Society
  • CRM system for NFT creation developed in Angular
  • Backend developed in Node.js and express
  • Blockchain developed with RSK with atomic swap system.

NFT Renting system on ERC721 and ERC1155 Standards

WeGotcha
07.2021 - 03.2022
  • Created NFT renting system with MultiSign Contracts
  • Created metatransactions systems to avoid final users to pay transaction fees
  • Backend developed in typescript
  • Developed in Ethereum Blockchain with private node.

Blockchain development

Paypertic
01.2019 - 07.2021
  • ERC20 Smart Contracts development on RSK Smart Bitcoins technology
  • Rewards payment System with StackHolding on ERC721 standard
  • Relay RIF for gas fees payments improvement
  • API development for Smart Contract connection with Web3.js and Node.js backend.

Freelance Blockchain development

Randlabs
10.2020 - 12.2020
  • Algorand blockchain development
  • Created a swap system for Ethereum and Algorand
  • Collaboration with TEAL (Transaction and Execution Approval Language) Vault system.

Blockchain and Mobile app development

Eurocoinpay
07.2017 - 12.2018
  • Entirely in Objective-C for shop payments with cryptocurrency
  • Created ERC20 Smart Contracts and Cryptonote fork for private network
  • We also created an IOTA instance for bridging private Cryptonote node and Solidity Smart contracts
  • IOS App includes geolocation for shops accepting Eurocoinpay crypto payment
  • We created a very user friendly and intuitive interface, paying in 2 simple steps
  • Also made devops maintenance on linux servers.

Education

Senior Programming Technician -

Technical University Argentina - UTN
Cordoba - Argentina
05.2001 -

Skills

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Job Reference

  • United Airlines, Carolina Cottonaro, carolina.cottonaro@blankfactor.com
  • Bosonic, Rosario Ingargiola, rosario@bosonic.digital, +1.415.347.8244
  • WeGotcha, Pablo Olivera, pablo.olivera@wegotcha.io, +54 9 11 7125-8808
  • Lothal, Tomas Spoturno, tommyspoturno@gmail.com, +54 9 2944 29-5306
  • Paypertic, Luis Bocchi, luisb@paypertic.com, (+549) 3516156325
  • Etips LTD, Libertad 299 - San Carlos de Bariloche, Sebastian Juarez, (+549) 294 154327252
  • Eurocoinpay - Spain, Leon de Castilla, www.eurocoinpay.io, Herminio Fernandez
  • Encrypto.art - Spain, Leon de Castilla, www.encrypto.art, Facundo Martin Arguello, (+34) 679895536
  • Tecno-Accion SA, Del Cormorán 6145 – Bo La Cascada, Guillermo Wiefling, (+549) 294 154924303

Certification

CCNA ( Cisco Certified Netwok Associate)

Timeline

Golang and Hyperledger Developer

United Airlines
10.2022 - 04.2023

Test machine creation on node.js techonolgy

4Logic
03.2022 - 06.2022

Blockchain Architect

Bosonic
11.2021 - 07.2022

CTO and Blockchain Architect

Lothal
07.2021

NFT Renting system on ERC721 and ERC1155 Standards

WeGotcha
07.2021 - 03.2022

Freelance Blockchain development

Randlabs
10.2020 - 12.2020

Blockchain development

Paypertic
01.2019 - 07.2021

Blockchain and Mobile app development

Eurocoinpay
07.2017 - 12.2018

CCNA ( Cisco Certified Netwok Associate)

12-2009

Senior Programming Technician -

Technical University Argentina - UTN
05.2001 -

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Sebastián NielsenBlockchain And Backend Engineer