Adarsh
Kumar

// Senior Staff Software Engineer

/**
 * Engineering financial infrastructure that serves
 * millions across Southeast Asia. From zero-to-one
 * startups to platforms processing $15B+ annually.
 */
Download ResumeLinkedIn
10+
years_of_experience
500K+
users_served
$15B+
transactions_processed
5
countries
01. about_me.tsx

//About Me

/* A decade of building high-stakes systems at scale */

Adarsh Kumar

I build systems that power financial infrastructure at scale. Over the past decade, I've designed and shipped platforms that process billions in transactions, serve hundreds of thousands of users, and operate across multiple countries in Southeast Asia.

From co-founding a venture-backed startup to leading platform modernization at regulated fintech companies, I've consistently taken ownership of complex technical challenges and turned them into reliable, scalable solutions.

I'm a strong individual contributor who thinks in systems. I care deeply about reliability, developer experience, and building teams that ship with confidence.

Led monolith-to-microservices migration for 500K+ users with zero downtime

Built real-time payment routing processing $15B+ annually across 3 countries

Co-founded and scaled a SaaS startup to $1.37M GMV with $480K in funding

Founding engineer of a top-3 regulated crypto exchange in the Philippines

02. experience.tsx

//Experience

/* 10 years of building at the intersection of engineering and product */

StashAway

@ Kuala Lumpur, Malaysia

$ senior_staff_engineerApr 2024 – Present
  • ▸Led decomposition of a monolithic platform serving 500K+ users across 5 markets into 12+ microservices with zero downtime migration
  • ▸Reduced release cycles by 40% and enabled the platform to handle 3x traffic spikes during market volatility
  • ▸Cut infrastructure costs by 30% (~$180K/year) through automated resource scheduling and Terraform-based governance
  • ▸Introduced MCP-based automated code review and test generation, boosting team shipping speed by 25%
  • ▸Defined API design standards across all services — versioned contracts, OpenAPI specs, consistent error handling
NestJSKafkaKubernetesTerraformPostgreSQLDatadogAWS

Xendit

YC S15

@ Philippines, Indonesia & Malaysia

$ technical_leadSep 2022 – Feb 2024
$ senior_software_engineerFeb 2021 – Aug 2022
  • ▸Built a real-time payment routing engine with automatic failover across 30+ channels — processing time from 8s to 2.4s, success rate from 88% to 97%
  • ▸Designed fault isolation layer achieving 99.99% platform availability at 10K+ QPS during peak hours
  • ▸Optimized storage for 500M+ transaction records — S3 costs down 65%, DB costs down 40%, p99 latency under 200ms
  • ▸Built unified notification service across WhatsApp, SMS, Viber, and email with 99.5% delivery rate for 10M+ monthly messages
  • ▸Led and mentored a 6-person engineering team, driving 35% increase in delivery velocity
Node.jsKafkaRedisPostgreSQLDynamoDBDatadogGrafanaAWS

On Demand Deals

@ Manila, Philippines

$ co-founder_&_ctoMay 2021 – Sep 2022
  • ▸Co-founded a SaaS platform for the F&B industry — owned all technical decisions, hiring, and product delivery end-to-end
  • ▸Built the entire platform solo initially, then hired and managed a team of 4 engineers
  • ▸Raised $480K pre-seed from Iterative (YC for SEA) and Accelerating Asia
  • ▸Scaled to 50+ shop locations across Manila, hitting $1.37M GMV with 200% month-over-month growth
ReactNode.jsPostgreSQLAWSCI/CD

PDAX

@ BGC, Philippines

$ senior_software_engineerNov 2019 – Feb 2021
$ software_engineerMar 2018 – Nov 2019
  • ▸Founding engineer — built the platform from scratch, grew PDAX into a top-3 regulated crypto exchange in the Philippines
  • ▸Built the core trade matching engine handling 5K+ concurrent orders with sub-100ms latency
  • ▸Integrated major Philippine banks and e-wallets for fiat on/off-ramps, reducing settlement from 3 days to real-time
  • ▸Designed and launched LOCQ — a first-of-its-kind fuel futures product on the blockchain
Node.jsRedisPostgreSQLReactWebSocketSolidity

Primus Software Corporation

@ Greater Noida, India

$ software_engineerSep 2017 – Mar 2018
  • ▸Built enterprise web and mobile applications for clients in healthcare, logistics, and education
  • ▸Led 3 proof-of-concept projects end-to-end for business development — all three helped win new client contracts
  • ▸Owned frontend architecture and API design on a logistics tracking platform with a team of 5
ReactAngularNode.jsPostgreSQL
03. work_highlights.tsx

//Work Highlights

/* Selected projects that demonstrate scale, ownership, and impact */

~/projects/real-time-payment-routing-engine.md
$15B+/year processed

Real-time Payment Routing Engine

@ Xendit

Intelligent payment routing system with automatic failover across 30+ bank and e-wallet integrations in 3 countries.

// challenge

Manual routing meant if a bank channel went down, someone had to notice and switch traffic. Processing was slow and unreliable.

// impact
  • ▸Processing time reduced from 8s to 2.4s
  • ▸Success rate improved from 88% to 97%
  • ▸99.99% platform availability achieved
Node.jsKafkaRedisPostgreSQLDatadog
~/projects/platform-modernization.md
500K+ users, 5 markets

Platform Modernization

@ StashAway

Decomposed a monolithic system into 12+ microservices with clear API contracts and Kafka-based event messaging.

// challenge

A monolith serving 500K+ users across 5 SEA markets where one team's changes regularly broke another's features.

// impact
  • ▸Zero downtime during entire migration
  • ▸Release cycles reduced by 40%
  • ▸Platform handles 3x traffic spikes seamlessly
NestJSKafkaKubernetesTerraformAWS
~/projects/on-demand-deals.md
$1.37M GMV

On Demand Deals

@ Co-founded

Full-stack SaaS platform for the F&B industry — restaurants, cloud kitchens, and QSR chains across Manila.

// challenge

The Philippine F&B industry lacked a unified digital platform for order management, analytics, and growth.

// impact
  • ▸$480K raised from Iterative & Accelerating Asia
  • ▸50+ shop locations onboarded in 6 months
  • ▸$1.37M GMV with 200% month-over-month growth
ReactNode.jsPostgreSQLAWS
~/projects/crypto-trade-matching-engine.md
5K+ concurrent orders

Crypto Trade Matching Engine

@ PDAX

Core trade matching engine for a regulated cryptocurrency exchange, designed for horizontal scaling during market volatility.

// challenge

Building a regulated crypto exchange from scratch in the Philippines with no existing infrastructure.

// impact
  • ▸Sub-100ms matching latency at 5K+ concurrent orders
  • ▸Grew to top-3 regulated exchange in the Philippines
  • ▸99.9% platform uptime during major market events
Node.jsRedisPostgreSQLWebSocketSolidity
~/projects/ai-powered-developer-tooling.md
25% faster shipping

AI-Powered Developer Tooling

@ StashAway

MCP-based automated code review and test generation pipeline to accelerate engineering output.

// challenge

Senior engineers spent 30% of their time on routine PR reviews, creating a bottleneck for the entire team.

// impact
  • ▸Review turnaround cut by 50%
  • ▸Team shipping speed increased by 25%
  • ▸Freed senior engineers for architecture work
MCPRAGVector DBsn8nNestJS
04. tech_stack.tsx

//Tech Stack

/* Tools and technologies I work with daily */

import * as Languages
from '@/languages';
JavaScriptTypeScriptPythonGolangJavaSolidity
import * as Backend
from '@/backend';
NestJSNode.jsTemporal Workflowsn8nREST APIsGraphQL
import * as AILLM
from '@/ai-and-llm';
MCPRAG PipelinesVector DBsPineconepgvectorPrompt EngineeringAgentic Workflows
import * as Databases
from '@/databases';
PostgreSQLMongoDBDynamoDBRedisClickHouse
import * as CloudInfrastructure
from '@/cloud-and-infrastructure';
AWSKubernetesTerraformHelmCI/CDDocker
import * as MessagingStreaming
from '@/messaging-and-streaming';
Apache KafkaRabbitMQAmazon SQS
import * as Observability
from '@/observability';
DatadogGrafanaPagerDutySentrySplunk
import * as Frontend
from '@/frontend';
ReactReact NativeNext.jsReduxAngularTailwind CSS
import * as DataAnalytics
from '@/data-and-analytics';
Apache SparkFlinkDatabricksRedashLooker
05. get_in_touch.tsx

//Get in Touch

/* Have a project in mind or want to connect? I'd love to hear from you. */

// contact_details

Email

adarshkumar2k@gmail.com

Phone

+91 9599401658

+60 135308971

Location

Kuala Lumpur, Malaysia

LinkedIn

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