A-00 · General arrangement
I'm Mrinal Maheshwari, Lead Architect at IndiGo Airlines. I design systems, set engineering standards and lead a team of 10 developers, QA and BAs from solution design to release.
Fig. 01 · The shape of systems I design
Six-plus years across mobile and web taught me where systems crack. Now I design them so they don’t.
I'm Lead Architect at IndiGo Airlines. I design system architecture, set engineering standards, and lead a team of 10 (developers, QA and BAs) from solution design through delivery.
Before architecture I spent years shipping in React, React Native, iOS (Swift) and Android (Java), so my designs come from someone who has had to build them. These days the work is making systems hold under load: faster APIs, payments that don't drop captures, and security audits closed out, without letting delivery dates slip.
P1
Latency, runtime and cost numbers decide what gets re-architected, and they prove whether it worked.
P2
Webhooks over polling, caches in front of vendors, and audit findings closed instead of deferred.
P3
Architecture only matters once it ships. Keeping releases on schedule is part of the design.
Each one started as a problem in production. These are the change records, with the numbers that closed them.
Re-architected a critical API path, cutting response time by an order of magnitude.
Before
seconds
After
<200ms
Optimized a CRON pipeline handling 200+ transactions every 30 minutes, cutting runtime by two-thirds.
Before
15 min
After
5 min
CR-03 · Payments
100% reliable
Designed a stable payment capture system built on gateway webhooks.
CR-04 · Cost
Lower latency + cost
Put a caching layer in front of third-party vendor APIs.
CR-05 · Security
Findings closed
Resolved security-audit findings and strengthened compliance posture.
CR-06 · Platform
Built from zero
Designed a React Native super-app architecture from the ground up.
Five teams since 2020, from intern to architect. Each bar is the real length of the role.
2020
2021
2022
2023
2024
2025
2026
Lead Architect
Nov 2024 — Now
Writing solutions for new features and setting best practices across the system. Leading a team of 10.
Digital Consultant
Sep 2022 — Nov 2024
Developed features for multiple clients and handled their deliveries.
Software Engineer
Sep 2021 — Aug 2022
React Native frontend: features for Premium users and a stable build.
Software Engineer
Jul 2020 — Aug 2021
Foxy (React Native) and Foxy Live (Swift).
Intern
Jan 2020 — Jun 2020
Data-warehouse analysis with SAP Business Objects and Power BI.
System design, API architecture and team leadership now take most of my time. The layers below are where I have shipped code myself.
L1
Clients
L2
Edge & delivery
L3
Services
L4
Infrastructure
X · Cross-cutting
Languages
Tooling
Practice
Side projects where I teach the thing I do at work: how systems behave, and how to build them well.
Interactive system design you can play with. Pick a real system (Uber, Swiggy, a URL shortener or a web page load), press Play, and watch a request travel through it hop by hop. Push heavy traffic to see queues fill and requests get rejected, or import your own draw.io diagram and animate it.
4
Systems
17
Guided flows
Free
No account
System design / Simulation / draw.io / Next.js / TypeScript
Twenty-four expert agents that give Claude Code, Cursor, Windsurf and Copilot real React Native expertise instead of generic React advice: build failures, performance, security, accessibility, native modules, navigation, push, payments, offline and release. Ships with a deterministic bundle-size analyzer that needs no API key.
24
Agents
128
Reference docs
0
Dependencies
React Native / AI agents / MCP / GitHub Actions / Node.js
Recent writing on React Native, tooling and architecture, from blog.mrinalmaheshwari.com.
N-01
React Native 0.88 introduces web-based event dispatching, variable fonts, iOS SceneDelegate support, and React 19.3, with no user-facing…
N-02
Why Anthropic moved its monorepo away from Git, how Scion handles thousands of AI-generated changes, and what it means for developers.
N-03
Why general AI coding assistants still miss React Native-specific context, and how specialist agents can make debugging, reviews, upgrades…
N-04
Anthropic’s invisible text watermark raises bigger questions about AI detection, authorship, content provenance, and how we may identify…
Architecture reviews, collaborations, or a new idea worth building. Email is the fastest way to reach me.