Advisory openings from Oct 2026 · Mumbai / remote
AI Production Systems Architect.
I architect AI agent systems and FinTech platforms that survive production - the kind with p99 commitments, regulator audits, and quarterly cloud-cost reviews on the same desk.
Client SDK
REST · gRPC
API Gateway
auth · rate-limit
↓
Order Router
matching
Risk Service
rules engine
↓
Kafka
events
Position Svc
ledger
↓
Postgres
WAL · replicas
Redis
hot path
S3 / Cold
audit · ARC
fig.01 · trading platform / simplified
Where I've shipped
NeoSOFTMongoDBJosh SoftwareXunisonPrudent Experts
Outcomes · since 2014
Specific numbers on production systems.
11Y
In the field
engineer → architect → leader
50%+
Latency reduced
HFT trading engine - p99 commitment met
40%
Cloud cost saved
$20k → $12k/mo on Claims platform
51
Agents orchestrated
in production, daily
Selected work · 01 of 04
All four →
A trading engine, re-architected in nine months.
The bottleneck wasn't the matching algorithm - it was the JVM holding the matching thread on a heap shared with audit and reporting. We split them.
The board committed to sub-2s p99 next quarter. A full rewrite was off the table - 12 engineers, one quarter. We decomposed three hot services surgically. The fast path got radically simpler, and it stopped lying about its latency.
P99 LATENCY
6s→1.8s
INFRA COST
~40% lower
AUDIT LOSS
zero
Java 21 Kafka Redis Kubernetes Go AWS
The work
Six lenses I bring to every system.
0x01
↗
AI Agent Systems
Orchestrator → leads → specialists. Not a chatbot - a system with clear routing, failure modes, and production observability. I've built one. I operate it daily.
0x02
↗
FinTech Architecture
Latency commitments, audit trails, regulatory constraints. 11 years under real production pressure at p99 - not on a demo cluster.
0x03
↗
Cloud-Native Modernisation
A sequenced path off the legacy monolith that cuts the cloud bill without a risky big-bang rewrite. Measured, not hand-wavy.
0x04
↗
Engineering Leadership
Translating why into how and back again. Technical strategy, team alignment, and the delivery cadence that makes it stick.
0x05
↗
Technical Governance
SOC 2, GDPR, PCI-DSS. Compliance as a default - not a last-mile audit the week before the regulator lands.
0x06
↗
Performance Engineering
p99 commitments met. Cloud bills cut. Throughput improvements that survive the next quarter and the one after that.
What colleagues say
“Sagar impressed us with his passion for his work and dedication to achieving excellence. His meticulous approach to work and ability to handle complex challenges make him a go-to person for critical projects. His exceptional leadership skills inspire and motivate team members to achieve outstanding results.”
Ravi Kavaiya
SSE @ Qatar Airways · Ex-AVP & HOD Java, NeoSOFT
“I have worked with Sagar on a couple of projects and his dedication, approach to problem solving is great. He has a very good depth of knowledge on technology.”
Mayur Savaliya
Cloud & DevSecOps Leader · 4× AWS / 2× GCP / 1× Azure
Writing
Notes from the field.
Get in touch
Have a system that needs thinking through?
Architecture review, modernisation roadmap, or hands-on technical leadership for a quarter or two. One reply away.
Or write directly: connect@sagarthakkar.com