Sheraz Haider — Senior Blockchain Engineer

/ 01 — ABOUT

Engineering for institutional-grade Web3.

Five-plus years writing full-stack JavaScript, three-plus deep in Web3. I specialize in the unglamorous parts of crypto that actually matter — secure transaction lifecycles, TEE signing boundaries, key-management models, and reconciliation services that keep on-chain and off-chain state honest.

Most recent work has been on policy-driven custody and Wallet-as-a-Service rails at Kresus, plus tokenization workflows on Canton — mint/burn, DvP-style settlement, participant integration. Before that, smart contracts and Web3 frontends across the Jadu AVA NFT collection and Cointelegraph's main product.

I'm comfortable in regulated environments and like working with product, compliance, and security folks at the same table. Less ape, more architect.

3+ Years in Web3

4337 EIP / AA Wallets

Canton · EVM · SOL Multi-chain

RWA · DvP Tokenization & settlement

MPC · HSM · KMS Key-management models

/ 02 — WORK

Selected experience.

01

KresusLabs

Senior Blockchain Developer

OCT 2023 — PRESENT

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// What I did

Led technical design of digital asset custody and WaaS — policy-driven transaction workflows, signing boundaries, multi-chain integration.
Designed custody and key-management models (HSM / KMS / MPC) for institutional security and operating-model decisions.
Delivered RWA / tokenization workflows on Canton — tokenized deposits, MMF-style assets, mint/burn, DvP-style settlement orchestration.
Architected and shipped an EIP-4337 Account Abstraction wallet stack — smart accounts, paymaster and bundler flows.
Built an in-house indexer for custom data needs and integrated Stripe, SendGrid, Twilio for payments and comms.

// Stack

Solidity EIP-4337 Canton Node.js AWS Postgres

// Location

Remote

02

Jadu

Frontend Web3 / Blockchain Developer

MAR 2022 — NOV 2023

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// What I did

Led web and blockchain product development for the Jadu AVA NFT collection.
Built Jadu.AR — the brand showcase — and Jadu Homebase, the portal for a successful AVA mint and asset management.
Developed Jadu Parts & Services — staking site for Jetpack and Hoverboard NFT holders to earn upgrades.
Wrote custom staking contracts and handled deployments to AWS EC2 and S3.

// Stack

Solidity Next.js Ethers.js AWS Hardhat

// Location

Remote

03

Cointelegraph

Frontend Developer

MAR 2021 — MAR 2022

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// What I did

Maintained and shipped features on cointelegraph.com — one of the largest crypto news properties.
Developed and maintained the in-house CMS and Ads management system.
Worked across distributed teams in multiple time zones.

// Stack

Nuxt.js Vue.js Laravel GraphQL

// Location

Remote

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/ 03 — PROJECTS

Things I've shipped.

KRESUSLABS 2025

Kresus Custody

Policy-driven digital asset custody and Wallet-as-a-Service. HSM/KMS/MPC key models, multi-chain signing boundaries, and reconciliation between on-chain and off-chain state.

Custody MPC Multi-chain Node.js

K

KRESUSLABS 2026

Canton RWA Rails

Tokenization workflows on Canton — tokenized deposits and MMF-style assets with mint/burn, DvP-style settlement orchestration, and participant integration patterns.

Canton RWA DvP Settlement

C

KRESUSLABS 2024

EIP-4337 Wallet

Account Abstraction wallet stack — smart accounts, paymaster and bundler flows, sponsored transactions, and a UX layer that doesn't make you think about gas.

EIP-4337 Solidity Bundler Paymaster

Λ

JADU 2022 → 23

Jadu AVA NFT

Web and blockchain product line for Jadu AVA — Jadu.AR brand site, Homebase mint/portal, and Parts & Services staking for Jetpack and Hoverboard NFT holders.

Solidity Staking Next.js AWS

J

/ 04 — STACK