Available for consulting & fractional CTO

Building systems
that scale.

Lead Software Architect · India & Singapore

8+ years at Apple & Carbyne building distributed systems that handle millions of requests daily. I help enterprises reduce cloud costs, modernise legacy architecture, and integrate GenAI — with results you can measure.

8+
Years building
70%
Cloud cost cut
1M+
Req / day handled
<50ms
Latency target
architect.profile
🎯
Focus
Distributed Systems at Scale
Core Stack
Scala Spark GenAI AWS
📍
Based in
India 🇮🇳 · Singapore 🇸🇬
Status
Open to opportunities
What I do

Three things I'm exceptionally good at

I don't just write code — I design systems that outlast the sprint and move the metrics that matter to the business.

01
🏗️

Enterprise Architecture

Designing fault-tolerant distributed systems from the ground up — built for reliability, horizontal scale, and the kind of traffic that wakes engineers up at 3am.

1M+ daily requests delivered
02
💰

Cloud Cost Optimisation

Transforming expensive monoliths into lean microservice architectures. I've cut cloud bills by 70% without sacrificing a millisecond of reliability — it's usually the first thing I find.

Up to 70% OpEx reduction
03
🤖

GenAI Integration

Building production-grade RAG pipelines and LLM integrations that actually work in the real world — with the observability, evaluation, and guardrails enterprises need.

40% data freshness improvement
Career

Where I've done the work

From public safety systems that handle 911 calls to Apple's geospatial infrastructure — the kind of work where failures aren't an option.

Apple (Vendor Contract)
2022 — Present
↑ 40% Data Freshness
Lead Software Engineer

Leading high-precision geospatial backend systems that power Apple Maps at scale. Drove the migration from batch to streaming pipelines — a change that had a measurable impact on real-time data quality for millions of users. Currently pioneering GenAI integration for intelligent data enrichment. My engineering standards were adopted across multiple cross-functional teams.

ScalaApache SparkStreamingGenAI / RAGGeospatial
Carbyne
2021 — 2022
1M+ Req/day
R&D Software Engineer

Designed mission-critical distributed systems for emergency response (911). When the system goes down, people die — so we built for five-nines reliability with ultra-low latency under sustained load. Built multiple core projects from scratch that became the backbone of Carbyne's public safety platform.

AWSMicroservicesReal-timePublic Safety
Apple India
2020 — 2021
↓ 70% OpEx
Senior Software Engineer

Fast-track promoted for results. Executed the strategic decoupling of a large monolith into microservices — cutting operational infrastructure costs by 70% while improving deployment velocity and system resilience. This is the work that showed me how much money sits hidden in architecture debt.

Akka / PekkoSparkSystem Design
Knoldus Inc.
2017 — 2020
"Above & Beyond" Award
Software Engineer

Consulted for global clients across Fintech, Edtech, and enterprise domains — delivering high-performance backend systems. Won the company's "Above and Beyond" award for excellence in reactive architecture and data engineering. This is where I built my foundation across industries.

BackendData EngineeringReactive Architecture
Skills

Technical Arsenal

The tools I reach for to solve hard problems at scale.

Core Languages
Scala
Java
Python
SQL
Distributed
Apache Spark
Akka / Pekko
Apache Kafka
Play Framework
GenAI & Data
RAG Pipelines
Vector Databases
LLM Integration
Cassandra
Cloud & DevOps
AWS Architecture
Kubernetes
Terraform
CI/CD
Proof of Work

Contributions & Credentials

Curriculum

The GenAI Engineer's Roadmap

Curated curriculum

From traditional engineering to LLM production — a clear path.

Most GenAI engineers skip the fundamentals. I built this roadmap to bridge the gap: from neural network intuition to shipping production RAG systems. Synthesised from Karpathy, Goodfellow, and my own production experience.

Explore the Roadmap
01
The Karpathy Foundation
Neural Networks & Backprop
02
The Transformer Revolution
Attention Mechanisms & GPT
03
Alignment & Fine-Tuning
RLHF, LoRA, InstructGPT
04
Production Engineering
RAG, Agents, Evaluation
Writing

Technical Insights

Deep-dives from 8 years in the trenches. No theory without production scars.

All Articles →
What people say

Endorsements from colleagues & managers

"

"I worked with Ayush as a direct manager; he built from scratch multiple projects crucial for Carbyne in the public safety domain. Ayush is a talent! He shares technical knowledge across R&D and shows real dedication to success."

Roy Shmuli
Team Lead @ Neema / Carbyne
"

"Ayush approaches every task with dedication and precision. He not only taught me new programming concepts but also helped me develop a deeper understanding of software architecture and design."

Chandan Singh Solanki
Data Engineer @ Rezatec (Ex-Apple)
"

"Ayush has demonstrated impressive growth over his tenure. He has proven capabilities to take ownership of modules at enterprise level. His technical expertise is impeccable, especially in Big Data and Scala."

Ayush Prashar
Software Engineer
"

"His energy, adaptability, and readiness to take ownership are truly impressive. On Carbyne, Ayush demonstrated innovative thinking and a strong sense of responsibility."

Harmeet Singh (Taara)
Senior Engineer

Let's build something great together.

Whether you need a fractional CTO, a distributed systems architect, or a GenAI strategy partner — I'd love to hear about the problem you're trying to solve.

mail@ayushtiwari.in +91-9560790485 · +65-84218018