Shadrach – AWS, React, Typescript, experts in Lemon.io

Shadrach

From Canada (UTC-6)flag

Full-stack Web Developer|Strong senior

Shadrach – AWS, React, Typescript

Shadrach is a strong senior full-stack engineer with deep expertise in AWS, Node.js, React, Next.js, and TypeScript. He has architected scalable backend systems, implemented event-driven architectures, and delivered real-time collaborative platforms, particularly in Web3 and AI-powered domains. Screenings confirm a client-first mindset and advanced proficiency in backend and frontend development. Shadrach is experienced in startup environments and direct client interaction.

7 years of commercial experience in
AI
Architecture
Blockchain
Cloud computing
Cryptocurrency
Customer support
Fintech
Fundraising
Hospitality
Sales
Open source
Enterprise software
Software development
AI platform
Agentic automation
Main technologies
AWS
4 years
React
5.5 years
Typescript
5 years
Node.js
4.5 years
Next.js
4 years
Ethers.js
4 years
RAG
1 year
Additional skills
Vercel
Kubernetes
Terraform
Rust
React Native
Supabase
Docker
PostgreSQL
Amazon SQS
Serverless Computing
AWS SES
AWS CloudFormation
AWS Lambda
MongoDB
Amazon S3
Amazon SNS
Amazon RDS
JavaScript
Cursor
Claude Code
Redis
Direct hire
Possible
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Experience Highlights

Senior Full-stack Engineer
Jul 2022 - Mar 20263 years 8 months
Project Overview

An AI-powered research assistant platform built on indexed peer-reviewed literature, enabling real-time collaboration between researchers.

Responsibilities:
  • Developed a critical data ETL pipeline for Indexing 250M+ peer-reviewed research records from OpenAlex dataset on Elasticsearch node, giving the AI research assistant citation-backed coverage across the full scientific corpus rather than a narrow slice of it.
  • Built real-time collaboration infrastructure (Cloudflare Durable Objects, PartyKit, CRDT/Automerge, Postgres) supportingconflict-free concurrent editing of research artifacts, contributing to 200% user growth within weeks of release.
  • Owned Kubernetes deployment, monitoring, and production operations across AWS, reducing mean time to detect production issues through centralized observability with Prometheus and Grafana.
  • Shipped the research assistant's core API and multiple product features powering citation-backed search across 250M+ scientific records
  • Contributed core smart-contract work (Solidity, Foundry) to the Desci Codex protocol, underpinning the trust and provenanc guarantees behind every published research object.
  • Led UI engineering for Nodes protocol web app, architectural setup, blockchain integration (wallets, ethers.js, Wagmi, etc.), performance optimization and avoiding SSR pitfalls for modern web3 apps.
Project Tech stack:
Next.js
React
Typescript
Node.js
PostgreSQL
ElasticSearch
Kubernetes
AWS
Cloudflare Worker
Terraform
Docker
Monorepo
Prometheus
Apollo GraphQL
Amazon S3
Datadog
AI API integration
Full-stack Founding Engineer (part-time)
Jul 2021 - Jul 20221 year
Project Overview

A DeFi protocol and DAO ecosystem with staking, liquidity management, and analytics.

Responsibilities:
  • Designed and deployed multiple production Solidity smart contracts;
  • Architected serverless backend infrastructure using AWS Lambda + DynamoDB;
  • Built staking dashboards and analytics web apps with Next.js + TypeScript;
  • Implemented subgraph indexing for blockchain data querying;
  • Led end-to-end feature development across smart contracts, backend, and frontend.
Project Tech stack:
AWS
AWS Lambda
DynamoDB
Next.js
Typescript
Solidity
Wagmi
Ethers.js
AWS CloudFormation
AWS SES
Amazon SQS
Serverless Computing
Amazon SNS
Full-stack Web3 Engineer
Sep 2021 - Mar 20226 months
Project Overview

A multi-chain crypto donation platform enabling nonprofits to receive donations across Bitcoin, Etheruem, EVM-compatible L2 chains and alternative chain.

Responsibilities:
  • Led development of the multi-chain donation UI using React, TypeScript, ethers.js, wagmi;
  • Provided blockchain Integrations across multiple EVM-compatible chains;
  • Contributed to Cosmos Rust smart contracts;
  • Implemented unit, integration, and E2E tests;
  • Designed wallet connection and transaction UX flows.
  • Cross-chain event indexing on MongoDb and development of internal analytics dashboard
Project Tech stack:
React
Typescript
Solidity
Rust
Ethers.js
Wagmi
Jest
Ethereum
Cosmwasm
MongoDB
Back-end Developer
Dec 2019 - Feb 20202 months
Project Overview

Book-IT is a Hotel booking platform designed with clean layered architecture, role-based access control, and production-ready engineering practices. The system allows users to browse hotels, book rooms, and manage reservations, while admins manage inventory and operations.

  • Demonstrates end-to-end ownership of a SaaS-style booking system;
  • Production-ready authentication & access control system;
  • Automated testing integrated into development workflow.
Responsibilities:
  • Designed and implemented a layered REST API architecture;
  • Automated test suites using Jest + Supertest for service and domain layers;
  • Enforced code quality via Husky pre-commit and pre-push hooks.
Project Tech stack:
JavaScript
Node.js
Express.js
Apollo GraphQL
MongoDB
MongooseODM
Jest
Supertest
JWT

Education

2021
Computer Science
Bachelor's

Languages

German
Pre-intermediate
English
Advanced

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