Kyle Bryant
Builder · Crypto × AI

Senior Blockchain Data Engineer at Fidelity. I work where institutional finance meets Ethereum — building data infrastructure for on-chain analytics by day, accelerating personal projects with AI-assisted development and maintaining a home Ethereum validator by night.

Selected builds→$get in touch▌
Web3 since
2018
Based
Greater Boston
Currently
Fidelity Investments
LinkedIn
@kyle-c-bryant
01 /section

Currently Building

Most recent commits across my public and private repos — pulled live from GitHub at build time.

refreshed just now
Commits per day · last 30 days
293 total
  • resume
  • testamentum-bot
  • QuinfallCrafting
  • kin-quilt
03365Apr 16Apr 30May 15

resume

public

updated just now

↗

Resume Website

  • 8e6d5e8Real resume content, 3D flippable coin, and GitHub activity section1m ago
  • 4f46988Build resume site: Next.js static export with Crypto x AI design6h ago
  • d2feab0Initial commit from Create Next App7h ago
TypeScript

testamentum-bot

public

updated 7h ago

↗

Discord bot for and scraping tool for Marcionite Church of Christ Testamentum

  • 3ae0f16Drop attribution tag from Ephesians (no name collision)7h ago
  • c778816Rename "Ephesians (Ignatius)" to "Ephesians (Marcion)" across the board7h ago
  • 022c4e3chore: update verse of the day15h ago
  • b24b2ebchore: update verse of the day2d ago
Python

QuinfallCrafting

private

updated 3d ago

  • fb8704cMerge dev: hotfix for inventory data-loss on first sign-in3d ago
  • 69b004dCorrect the safety net — gate on prev→state transition, not cache4d ago
  • cfee42dHotfix: don't clobber non-empty inventory rows with empty items4d ago
  • 7ed6116Merge dev: auth + inventory sync + Workshop Premium4d ago
TypeScript

kin-quilt

private

updated 11d ago

Genealogy Research Web App

  • b3531ebbiographyDocx: strip stray control bytes that broke sentinel matcher11d ago
  • e1bcaf3biographyDocx: pre-strip ref tags so multi-line refs don't fragment11d ago
  • 32c8841BiographyPanel: download as Word (.docx) — also opens in Google Docs12d ago
  • 2f1b686findAGrave: pass linkedToName when target carries multiple lastNames13d ago
TypeScript
02 /section

Selected Builds

Personal projects and hackathon winners. The work that best represents how I think and what I ship.

4 highlighted
012021 — 2024
Lead Eng

Brink — Intent-Based DeFi

Signature-based DCA, stop-loss, and limit orders on Ethereum

Lead backend engineer for a suite of decentralized apps pioneering intent-based interactions. Users sign typed messages; an off-chain executor network competes to fulfill them on-chain across Ethereum and L2s.

  • Owned backend, SDK, and execution infrastructure end-to-end
  • Pioneered the intent-based pattern for trustless DCA, stop-loss, and limit orders
  • Shipped on Ethereum mainnet and multiple Layer 2s
TypeScriptSolidityEthereumL2sEIP-712Node.js
022018 — 2019
Open Source

Boomerang — Universal Login

EIP-1077 / EIP-1078 Web3 UX, three years before AA was cool

Lead Blockchain Architect on Skedaddle's Boomerang platform. Re-architected onboarding around the Universal Login Standard, contributed upstream to UniversalLoginSDK, and shipped the BoomerangSDK node library for integrators.

  • Caught a front-running vuln and rewrote the contracts from scratch — cheaper, safer, more flexible
  • Open-source contributions to UniversalLoginSDK
  • Best UX at ETHBerlin for the EIP-1077 integration
SolidityEIP-1077EIP-1078Node.js
03ongoing
Personal

Home Ethereum Validator

Solo-staking on my own hardware

Running a home validator keeps me close to the protocol-level realities of the network I engineer around — consensus dynamics, client diversity, MEV-Boost trade-offs, and slashing risk.

  • Solo-staked on residential hardware — no third-party operator in the loop
  • Hands-on with the full client stack (execution + consensus)
EthereumConsensus ClientsExecution ClientsMEV-Boost
042025 — present
Active

Claude Code Builds

AI-assisted prototyping for blockchain & developer tooling

Active experiments using Claude Code to compress the build cycle on smart-contract integrations, on-chain data tools, and developer-focused web apps. This site is one of them.

  • Tight iteration loop on greenfield ideas — ship the smallest credible version, then refine
  • Pattern-spotting: which problems benefit from AI-in-the-loop vs. hand-rolled
Claude CodeNext.jsTypeScriptAnthropic SDK
03 /section

Hackathons

A few weekends I'm proud of. Real teams, tight deadlines, deployed contracts.

3 events
Sep 2018Winner
ETHBerlin · Berlin, DE
Boomerang — EIP-1077 UX
↳Winner · Best UX
—Winner
ETHBuenosAires · Buenos Aires, AR
Hackathon Winner
↳Winner
—Finalist
ETHDenver · Denver, CO
Spirit of Build
↳Spirit of Build Award
04 /section

Work History

Where I've spent my full-time hours.

  1. Senior Blockchain Data Engineer @ Fidelity Investments

    Dec 2024 — Present · Boston, MA

    Building data infrastructure at the intersection of traditional finance and decentralized systems — bridging institutional rigor with on-chain analytics and Ethereum data.

    • On-chain data platform work supporting institutional analytics on Ethereum.
    • Bridging the gap between institutional infrastructure and decentralized data sources.
    EthereumData EngineeringAWS

  2. Lead Backend Engineer @ Brink

    May 2021 — Dec 2024 · Remote

    Backend, SDK, and execution infrastructure for multiple decentralized web apps pioneering intent-based interactions on Ethereum and L2s.

    • Pioneered intent-based applications enabling trustless DCA, stop-loss, and limit orders.
    • Designed signature-based execution flows across Ethereum and various Layer 2s.
    • Shipped both customer-facing SDKs and the executor infrastructure that fulfilled the intents.
    TypeScriptSolidityEthereumL2sNode.js

  3. Lead Software Engineer @ Reggora

    Oct 2019 — May 2021 · Greater Boston

    Promoted from Senior to Lead. Ran the technical integrations team (5 engineers) handling third-party business APIs and the event-driven backbone of the product.

    • Led architecture and quality for a team of 5 on partner API integrations.
    • Designed and shipped an event-sourcing rewrite — consumer nodes, SQS, SNS, event forks, DynamoDB — enabling horizontal scaling and recovery from a critical DB failure.
    • Shipped features end-to-end across React, Flask, and MongoDB.
    PythonFlaskReactAWSDynamoDBMongoDB

  4. Senior Smart Contract Engineer @ Skedaddle

    Aug 2018 — Oct 2019 · Boston, MA

    Lead Blockchain Architect on Boomerang. Built the platform around the Universal Login Standard (EIP-1077 / EIP-1078) — a then-novel Web3 UX paradigm.

    • Caught a front-running vuln in the original contracts and rewrote them from scratch — cheaper, more versatile, more secure.
    • Open-source contributions to UniversalLoginSDK to support Boomerang's requirements.
    • Designed and built the BoomerangSDK node library for third-party integrators.
    • Represented the project at ETHBerlin (Best UX winner), the Status Cryptolife Hackathon, and Devcon 4.
    SolidityEIP-1077EIP-1078Node.js

  5. Software Engineer @ Hitachi Vantara

    Jan 2017 — Aug 2018 · Waltham, MA

    Migrated and maintained internal projects; contributed to the design of worker nodes for Hitachi's ETL tool.

    • Updated internal projects from Ant to Maven.
    • Worked on high-level design of horizontally-scaling ETL worker nodes.
    • Contributed to an internal application platform.
    JavaMavenETL

  6. Software Development Engineer @ Amazon Robotics

    May 2015 — Jan 2017 · Westborough, MA

    Internal tooling for the Enterprise Data Warehousing team — comparative metrics, extraction/aggregation, and cross-shard SQL execution.

    • Built data-accuracy tooling that surfaced discrepancies across the EDW.
    • Designed a web UI + backend for executing SQL across all database shards with failure reporting.
    • Heavy AWS day-to-day.
    JavaAWSSQL
05 /section

Education

Where the foundations got built.

Worcester Polytechnic Institute

2011 — 2015

B.S. Interactive Media and Game Development · Minor in Computer Science

  • Best 3D Video Game
  • Honorable Mention — Best Major Qualifying Project (Video Game)
06 /section

Stack

What I reach for. Roughly grouped — strong opinions, loosely held.

01

Languages

  • TypeScript
  • Solidity
  • Python
  • Java
02

Blockchain

  • Ethereum
  • Layer 2s
  • EIP-1077
  • EIP-1078
  • EIP-712
  • Account Abstraction
  • Validator Operations
03

Backend

  • Node.js
  • Flask
  • Event Sourcing
  • SDK Design
04

Frontend

  • React
  • Next.js
05

Data

  • On-chain Analytics
  • Data Engineering
  • ETL
  • MongoDB
  • DynamoDB
06

Infra

  • AWS
  • SQS
  • SNS
  • MEV-Boost
  • Beacon Chain
07

AI / Tooling

  • Claude Code
  • Anthropic SDK
  • AI-Assisted Dev
TypeScript ◆Solidity ◆Python ◆Java ◆Ethereum ◆Layer 2s ◆EIP-1077 ◆EIP-1078 ◆EIP-712 ◆Account Abstraction ◆Validator Operations ◆Node.js ◆Flask ◆Event Sourcing ◆SDK Design ◆React ◆Next.js ◆On-chain Analytics ◆Data Engineering ◆ETL ◆MongoDB ◆DynamoDB ◆AWS ◆SQS ◆SNS ◆MEV-Boost ◆Beacon Chain ◆Claude Code ◆Anthropic SDK ◆AI-Assisted Dev ◆TypeScript ◆Solidity ◆Python ◆Java ◆Ethereum ◆Layer 2s ◆EIP-1077 ◆EIP-1078 ◆EIP-712 ◆Account Abstraction ◆Validator Operations ◆Node.js ◆Flask ◆Event Sourcing ◆SDK Design ◆React ◆Next.js ◆On-chain Analytics ◆Data Engineering ◆ETL ◆MongoDB ◆DynamoDB ◆AWS ◆SQS ◆SNS ◆MEV-Boost ◆Beacon Chain ◆Claude Code ◆Anthropic SDK ◆AI-Assisted Dev ◆
07 /section

Let's build something

I'm especially interested in agentic infra, novel cryptographic UX, and anything where the on-chain and AI sides actually need each other.

Coming soon
Send a message

Drop a note and I'll reply by email. Hookup pending.

LinkedIn
↗
in/kyle-c-bryant

Quickest way to reach me until the form is live.