Henry L Lee
Portrait
I build software that feels calm — even when the systems behind it are not.
I'm a software engineer with 8+ years of experience designing and shipping web platforms, APIs and data-heavy services. I care about clear architecture, honest tests and interfaces people actually enjoy using.
Most of my work lives where product meets infrastructure: turning fuzzy requirements into reliable, observable systems that teams can grow with confidence.
Open to new collaborationsThe board palette
5 tonesSimple is not the absence of complexity. It's complexity that has been carefully put away.— a note to self
Backend & APIs
Service design, REST and GraphQL APIs, event-driven pipelines and the database work that keeps them fast.
TypeScriptGoPythonNode.jsPostgreSQLKafkaRedis
DepthExpert
Ledgerline
A real-time transaction monitoring platform that ingests millions of events per day and surfaces anomalies to operations teams within seconds.
GoKafkaClickHouseReact
4.2Mevents / day
−63%alert noise
Terracotta
#c65d3bSenior Software Engineer
Northwind Fintech · Remote
- Lead engineer on the payments platform team of six, owning architecture for core settlement services.
- Migrated a monolith to domain-based services, cutting deploy time from 40 to 6 minutes.
- Introduced tracing and SLOs across 30+ services; incident MTTR dropped by half.
- Mentor to four engineers, two promoted to mid-level.
8+
years turning ideas into production software
Frontend Craft
Accessible, fast interfaces with thoughtful state management and design-system thinking.
ReactNext.jsVueCSS / Motiona11y
Make it work, make it right, make it fast — and write down why.— working principle
Atelier UI
An open design-system toolkit with 60+ accessible components, design tokens and visual regression tests, adopted across four product teams.
ReactTypeScriptStorybookPlaywright
Olive
#6b705cLet's build something good.
Whether it's a role, a project or a hard problem you'd like a second pair of eyes on — I'd love to hear from you.
Cloud & DevOps
AWSGCPDockerKubernetesTerraformGitHub Actions
Infrastructure as codeAdvanced
ObservabilityAdvanced
Software Engineer
Brightloop Labs · Hybrid
- Built the customer-facing analytics dashboard used by 1,200+ B2B clients.
- Designed a caching layer that reduced database load by 70% at peak.
- Championed trunk-based development and feature flags.
- Understand the problem before the stack.
- Ship small, ship often, measure.
- Tests are documentation that runs.
- Leave the codebase kinder than I found it.
Meshwork Gateway
A lightweight API gateway with rate limiting, auth and request tracing built in — designed so small teams get production-grade edges without the ops overhead.
GogRPCOpenTelemetryRedis
18kreq / sec
99.98%uptime
Address
Henry L Lee
Polna 5
76792 Slupsk
Poland
76792 Slupsk
Poland
Sand
#ddbea9Engineering Practice
System design, testing strategy (unit → contract → e2e), code review culture, technical writing and pragmatic agile delivery.
System designTDDCI/CDMentoring
The best code I've written is the code I managed to delete.— Henry L Lee
Junior Software Developer
Copperleaf Studio
- Delivered web applications for retail and logistics clients.
- Wrote the studio's first automated test suite and CI pipeline.
Fieldnote
An offline-first mobile app for field inspectors, syncing safely over poor connections with conflict-free replicated data.
React NativeSQLiteCRDTsNode.js
B.Sc. Computer Science
Focus: distributed systems & HCI
Thesis on consistency trade-offs in eventually consistent data stores.
Blush
#ffe8d6Reply time is usually within a day. Coffee chats welcome.Write an email →
Warm White
#faf7f2Nothing pinned here yet.