AI apps · Scalable SaaS · Distributed systems · Blockchain apps · AI apps · Scalable SaaS · Distributed systems · Blockchain apps ·

Nish

Hands-on Lead Software Engineer with end-to-end product ownership, from early ideas through to fully delivered features.

Building AI apps, scalable SaaS, distributed systems & blockchain apps

See recent work ↓

13 playground apps

PythonTypeScriptGo

Visa · IBM · M&S

Node.js · FastAPI · AWS

WORKED WITH

BondexArena EntertainmentIBMVisaM&SVirginTelefonica

Recent work

Built recently.

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pushed 7 days ago

Bill Exception AI Agent

Row-level security under a tenant-scoped manager. One missing filter in code does not leak rows.

domain-driven-designevent-drivenfastapievalsgithub.com/nish1013/bill-exception-ai-agent ↗

pushed 7 days ago

Event Driven Risk Segmenter

Transactional outbox, not publish-after-commit. A crash between commit and publish cannot lose an event.

domain-driven-designevent-drivenfastapievalsgithub.com/nish1013/event-driven-risk-segmenter ↗

pushed 7 days ago

Camp Guest AI Agent

A code rule, not the LLM, catches life-safety words. An emergency reply never waits on a model verdict.

domain-driven-designevent-drivenfastapievalsgithub.com/nish1013/camp-guest-ai-agent ↗

Stack

PythonFastAPI · Pydantic · LangChain · data pipelines

TypeScriptNode.js · NestJS · React · Next.js

Goconcurrent, high-volume services

AI & data

LLMsLangChainLangSmithRAGMCPPrompt engineeringLLM data pipelinesMatching & rankingData enrichment

Distributed systems

High-volume transactionsConcurrencyEvent-drivenBackground workersFailure recovery

Cloud & infra

AWSKubernetesAWS Step FunctionsSQSSNSAzureRailwayGitHub ActionsCI/CD

Messaging & design

RabbitMQKafkaRedisMicroservicesCQRSDDDGraphQLREST

Data stores

PostgreSQLMySQLMongoDB

Also

Express.jsJava

AI-assisted dev

Claude CodeCursorGitHub Copilot

Writing

Crafting Better Code with TypeScript

read →

Why starting with ‘unknown’ might be better than ‘any’ in TypeScript

read →

Rethinking Union Types in TypeScript

read →

All posts →

Elsewhere

LinkedIn ↗GitHub ↗YouTube ↗

Playground

Playground. Click one to open it.

Actxio

Letters in, deadlines out

AI agentMCPTypeScriptNext.jsNode.jsLLM (OpenAI)Supabaseactxio.com ↗02

AI Signal

Engineering blogs and AI lab news, daily

RSSDaily cronTypeScriptNext.jsReactTailwind CSSVercelsignal.satharasinghe.com ↗03

Promptype

Touch typing for prompt writers

AI drillsTypeScriptNext.jsLLMPostgreSQLpromptype.satharasinghe.com ↗04

Risk Engine

Flags risky financial activity

PythonFastAPIPostgreSQLriskengine.satharasinghe.com ↗05

Ledger Match

Finds mismatched transactions

TypeScriptPythonNext.jsFastAPIledgermatch.satharasinghe.com ↗06

Claims API

Insurance claims processor

TypeScriptNestJSNode.jsMongoDBMicroservicesSwaggerclaims.satharasinghe.com ↗07

Cinema Booking

Holds your seats on a timer

TypeScriptPythonNext.jsFastAPIPostgreSQLcinemabooking.satharasinghe.com ↗08

Club Booking

School clubs with a waiting list

TypeScriptPythonNext.jsNode.jsFastAPIPostgreSQLcbooking.satharasinghe.com ↗09

Childminders Register

Signs children in and out in one tap

TypeScriptReactNode.jsExpressPGlitechildminders.satharasinghe.com ↗10

Web3 Wallet

Checks a blockchain wallet balance

TypeScriptWeb3NestJSNode.jsTatum SDKPreactwallet.satharasinghe.com ↗11

Package Pulse

Dependency health checks

TypeScriptPythonNext.jsNode.jsFastAPISSE streamingpackagepulse.satharasinghe.com ↗12

Interactive Python

Checks your Python as you learn

TypeScriptReactPyodidenishpy.satharasinghe.com ↗13

Python Playground

Learn by running examples inline

TypeScriptNext.jsPyodidepython.satharasinghe.com ↗

Built with TypeScript, React & Node.js · View Code ↗