Germán

From Portugal (UTC+1)

Blockchain Engineer|Senior

Full-stack Web Developer|Senior

Skills and seniority verified on Mar 5, 2026

Germán – React, Next.js, Typescript

Senior Software Engineer with 12+ years of experience building high-performance web platforms, developer SDKs, and Ethereum wallet infrastructure. Specialized in TypeScript, React, and Node.js, with expertise in scalable frontend architecture, real-time systems, and blockchain integrations.

10 years of commercial experience in

Blockchain

Cryptocurrency

Data analytics

Fintech

Healthtech

Maritime

Open source

Enterprise software

Web3

Web development

Software development

Financial asset management

Main technologies

React

8 years

Next.js

3 years

Typescript

8 years

Blockchain

8 years

Ethereum

8 years

Node.js

6 years

web3.js

8 years

Ethers.js

6 years

Additional skills

JavaScript

Material UI

React Hooks

CSS

React Hook Form

Redux

API

Unit testing

Integration Testing

Solidity

Jest

HardHat

React Query

Browser extension

GitHub Actions

GitHub

Git

CI/CD

Docker

Tailwind CSS

Wagmi

Claude LLM

Nest.js

Cursor

PostgreSQL

Zustand

HTML

.NET

Data analysis

D3.js

RPC

Distributed Systems

Google Analytics

ClickHouse

OAuth

Docker Compose

Design system

Cloudflare

Data Modeling

Direct hire

Possible

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Experience Highlights

Founding Frontend Engineer

Jun 2025 - Feb 20268 months

Project Overview

Perpetual futures trading platform

Responsibilities:

Architecting the frontend, component system, and data flow for a high-performance trading experience across thousands of markets, with WebSocket-driven updates, an in-house charting library, and integrations with smart contracts, Pyth, CoinGecko, and other market-data services.

Project Tech stack:

JavaScript

Typescript

Node.js

PostgreSQL

React

React Query

React Hooks

API

Zustand

Distributed Systems

Tailwind CSS

Design system

Git

GitHub

GitHub Actions

Docker

Docker Compose

Data Modeling

Ethereum

RPC

Blockchain

web3.js

D3.js

Senior Software Engineer

Apr 2022 - May 20253 years 1 month

Project Overview

Multisig security for onchain assets on the Ethereum ecosystem with $50B+ of total value locked and $1T+ of total volume processed.

Responsibilities:

Designed and launched the Safe{Core} Account Abstraction SDK integrating 100+ EVM chains and multiple partners.
Worked on the integration of the Safenet transaction processor network into the Safe{Wallet} web application.
Served as technical member for the Safe Grants Program committee. Performed initial due diligence and provided ongoing technical oversight via milestone reviews and consultations to ensure project delivery.
Sponsored global in-person and online hackathons, led workshops on Account Abstraction, and produced technical documentation, and demo applications while coordinating with SDK and API teams.
Supported external companies building on the Safe ecosystem.
Mentored and supported team members on the technology stack and business logic.
Participated in the hiring and selection processes.

Project Tech stack:

Typescript

JavaScript

React

React Hooks

React Hook Form

React Query

Tailwind CSS

Node.js

Solidity

Wagmi

Ethers.js

web3.js

Unit testing

Integration Testing

Jest

Docker

Git

GitHub

GitHub Actions

Claude LLM

Cursor

PostgreSQL

Nest.js

Senior Software Engineer, Frontend

Dec 2017 - Apr 20224 years 4 months

Project Overview

It's a Blockchain infrastructure provider focused on creating tools to help expand the utility of the Ethereum ecosystem, having incubated companies such as Safe and CoW Protocol.

Responsibilities:

Designed, architected, and implemented the Safe browser extension, integrating an EVM-compatible smart contract wallet into browsers.
Built the Contract Proxy Kit and Safe{Core} Account Abstraction SDK.
Contributed to the Safe{Wallet} web application implementation.
Participated in hiring and candidate selection processes.

Project Tech stack:

Browser extension

React

React Hook Form

React Query

JavaScript

Typescript

Ethers.js

web3.js

Solidity

HardHat

Redux

Material UI

Jest

Blockchain

Ethereum

HTML

CSS

API

Integration Testing

Unit testing

Node.js

React Hooks

Git

GitHub

Docker

GitHub Actions

Software Engineer

Aug 2016 - Dec 20171 year 4 months

Project Overview

Development and manufacture of electronic equipment adapted to the marine environment and focused on smart oceans and sustainable fishing.

Responsibilities:

Maintained and expanded the in-house airtime billing system and daily reporting for customers and the tuna fishing fleet.
Designed and migrated the airtime billing system to a desktop application.

Project Tech stack:

.NET

PostgreSQL

Keep in mind, the experience summary might exclude non-relevant projects

Languages

Galician

Advanced

Spanish

Advanced

English

Advanced

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