Hi there, I'm

Susan Githaiga.

Software developer

I’m a software developer in Kenya building web applications, APIs, and open-source tools with Rust, TypeScript, and Python. My work brings together clear interfaces, dependable backend systems, and contributions to the Bitcoin and Lightning ecosystem.

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Nostrich
susan.js
const susan = {
  role: 'Software Developer',
  builds: ['Next.js', 'Rust'],
  designs: 'in Figma',
  contributes: 'Bitcoin ⚡',
  coffee: true,
};
Fullstack Developer
UI/UX Design
Open Source
  • TypeScript
  • JavaScript
  • React
  • Next.js
  • Node.js
  • Ruby on Rails
  • Rust
  • Python
  • PostgreSQL
  • Bitcoin
  • Lightning Network
  • Tailwind CSS
  • UI/UX Design
3+Years of Experience
30+Projects Shipped
15+BOSS Contributions

What I do

I build software from interface to infrastructure: responsive web applications, reliable APIs, and open-source tools for Bitcoin and Lightning. Each project is shaped around the people who use it and the systems it needs to work with.

Bitcoin & Lightning Development

I build open-source tools and services for the Bitcoin and Lightning Network ecosystem

Software Development

I work on both the front-end and back-end of software applications.

API Development

I design and build high-quality REST and Lightning APIs customized to meet your requirements.

UI/UX Design

I deliver UI/UX design services carefully crafted to align with your product goals and your users needs.

Featured Projects

SiriScore
1,200+ npm installs
PythonFastAPITypeScriptBitcoinpackage

SiriScore

An open-source Bitcoin transaction privacy analyzer that scores transactions before they are signed and broadcast, while privacy leaks can still be fixed. Paste a PSBT, raw transaction, or txid and get a 0-100 privacy score with actionable findings from chain-analysis heuristics. Published as a TypeScript npm package with 1,200+ cumulative installs.

CodenpmLive demoDocs

Design work

KenUcash
FigmaWeb App

KenUcash

A cash remittance website design for sending money to Kenya, with a clean onboarding flow and transaction experience.

Design filePrototype

Experience & Education

Work Experience

  1. February 2026 - Present

    Dada Devs

    Blockchain Developer Peer Lead · Nairobi, Kenya

    • Lead a Mastering Bitcoin study group, guiding students through keys & wallets, transactions, mining, networking, and the Lightning Network
    • Facilitate weekly sessions combining technical instruction with collaborative problem-solving
    • Support students with practical Git/GitHub workflows and version-control best practices

  2. December 2025 - April 2026

    Chaincode Labs - BOSS Program

    Bitcoin Open Source Contributor

    • Built a Lightning anchor-output fee-bumping service to help users confirm stuck transactions, featured among the top projects of the BOSS 2026 cohort
    • BTCPay Server: shipped plugin min/max version-compatibility checks and refactored the Builds and Owners tabs for visual consistency
    • Bitcoin Dev Project: added sitewide SEO metadata and cut ~10MB of client JS via lazy loading and dependency cleanup
    • Blockstream Esplora: replaced the explorer footer's static year with automated rendering

  3. January 2026 - February 2026

    Turing

    Business Analyst · Palo Alto, CA (Remote)

    • Evaluated AI-generated outputs side-by-side for quality and accuracy to support multimodal AI training
    • Delivered structured, evidence-backed justifications for evaluation decisions across all assessments

  4. November 2023 - January 2025

    GoAnotherLevel

    Software Developer · Tennessee, USA (Remote)

    • Developed and maintained the company website with React.js and WordPress, resolving broken links and form errors
    • Ran SEO/SEM strategy end-to-end and tracked growth through Google Analytics
    • Designed and executed email marketing campaigns via Mailchimp

  5. August 2023 - September 2023

    iTalanta

    Angular Programming Intern · Nairobi, Kenya

    • Built and enhanced web applications with Angular alongside a team of developers and mentors

  6. April 2022 - July 2022

    Dynic Fibre

    Network Engineering Intern · Nairobi, Kenya

    • Configured and maintained routers, switches, and firewalls for stable ISP connectivity
    • Troubleshot connectivity issues and monitored network activity for security and optimization

Education

  1. October 2025 - January 2026

    Dada Devs

    Blockchain Development

    • The Lightning Network, Cryptography & Security, Taproot, HTLC, Bitcoin networking and open source

  2. September 2023 - October 2023

    Social Media College

    Digital Marketing

  3. November 2022 - June 2023

    Moringa School

    Software Engineering

  4. September 2018 - October 2022

    South Eastern Kenya University

    Bachelor of Information Technology

  5. September 2021 - June 2022

    Kenyatta University CISCO Academy

    Cisco Certified Network Associate

    • ITE: IT Essentials
    • CCNA 1: Introduction to Networks
    • CCNA 2: Switching, Routing, and Wireless Essentials
    • CCNA 3: Enterprise Networking, Security, and Automation

Open Source

Merged pull requests across the Bitcoin ecosystem and beyond. Every card links to the contribution page.

GitHub All In Open Source ContributorView credentialChaincode Labs BOSS 2026 Featured ProjectView credentialHack4Freedom: Your First BOSS ContributionView slides

Bitcoin Dev Project

Merged

Made the homepage "Featured In" logos clickable with smooth hover animations, making partner recognition interactive and aligned with the Figma design.

PR #318

Bitcoin Dev Project

Merged

Rebuilt the sitemap and removed stale routes to improve search crawling.

PR #349

BTCPay Server Plugin Builder

Merged

Added min/max version compatibility info to the plugin directory, so users can tell whether a plugin works with their setup before installing.

PR #188

BTCPay Server Plugin Builder

Merged

Refactored the Builds and Owners tabs to match BTCPay Server's report tab style, bringing visual consistency across the platform.

PR #200

Bitcoin Dev Project

Merged

Added a hover stroke effect to Learn/Contribute resource cards, making it clearer which card users are interacting with.

PR #316

Bitcoin Dev Project

Merged

Reduced the client-side JavaScript bundle via lazy loading, tree-shaking, and dependency cleanup to speed up page loads.

Issue #339PR #355

OpenTelemetry

Merged

Fixed image and visualization backgrounds so they display correctly in both dark and light mode without changing the overall theme.

PR #5438

OpenTelemetry

Merged

Fixed image display for dark mode on the Instrumentation Scope page so content renders correctly without breaking the page theme.

PR #5440

Bitcoin Dev Project

Merged

Added a new "Explore" section to the homepage, giving users a clearer path to navigate Bitcoin dev resources.

PR #327

Bitcoin Dev Project

Merged

Made the MDX renderer load only page-specific components: a build-time regex scan filters the 25+ component map down to what each page actually uses, at zero runtime cost.

PR #361

BTCPay Server Plugin Builder

Merged

Fixed a UI bug where contributor names overlapped and text broke on plugin pages, making the layout cleaner and easier to read.

PR #190

BTCPay Server Plugin Builder

Merged

Added a version selector to the plugin details page, so users can view and download any available version, not just the latest.

PR #206

Bitcoin Dev Project

Merged

Added SEO metadata across all pages of the site to enable Google search indexing and improve discoverability.

PR #347

OpenTelemetry

Merged

Improved the registry UI's font sizes, colors, and borders to stay readable across light and dark modes on all screen sizes.

PR #5395

Blockstream(Esplora)

Merged

Replaced the explorer footer's static year with automated dynamic rendering, so the UI stays current without manual updates.

PR #612

Lighting Network Gallery(lngal)

Merged

Added the Zap website link to the community-maintained interactive visualization of the Lightning Network ecosystem by Bitdevs Nairobi.

PR #24

256foundation/mujina

Merged

Removed the crc_all dependency from a Bitcoin mining firmware project, replacing it with inline CRC-5-USB and CRC-16-CCITT-FALSE implementations to cut down transitive dependencies.

PR #103

Tando-BTCPay-Plugin

Merged

Added a complete local development setup guide for the Tando BTCPay plugin (Docker regtest, build steps, config generation, and a test Lightning payment walkthrough

PR #2

Tando-BTCPay-Plugin

In Progress

Implemented phone number verification at merchant signup via Safaricom's Daraja API, blocking store creation for unowned mobile numbers before payouts can get stuck.

PR #10

Saving Satoshi

Merged

Added minimize, maximize, and drag-resize controls to scripting challenge error and output panels, preventing them from blocking the code editor after script errors.

PR #1479

Mujina

In Progress

Replaced the bitvec dependency with native bitwise operations in the BM13xx mining driver, reducing dependencies and adding tests covering all 256 response byte values.

PR #118
View all contributions on GitHub

Writing

Notes from things I’m building and learning.

Read all posts on DEV.to

Let’s talk

Have a project in mind or just want to say hi? Drop a message and I'll get back to you.

Please review my Pricing & Rates before submitting a project request. If you’re hiring, let’s connect.