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AqibChattha/README.md

Aqib Chattha

Software Engineer — payments and distributed systems

aqibchattha.com · LinkedIn · hello@aqibchattha.com

I build reliable systems for financial infrastructure at i2c Inc. — real-time payment rails, ISO 20022 message handling, distributed batch pipelines, caching architecture and database performance. Systems where correctness under concurrency is the hard part.

What I work on

FedNow / ISO 20022 — parsing and validation for US Federal Reserve instant-payment messages, plus a specification of 3,000+ parameters with their valid values and semantics.

Payment Hub — network integrations for financial institutions and FinTechs across Spring Boot microservices.

Credit Card Payment Distribution — took a batch cycle from 30–40 minutes to 6–8 minutes using range-based processing, card-hierarchy grouping and bounded parallelism.

Two-level caching — a local JCS cache in front of shared Redis, invalidated over Kafka.

Agentic AI in production — integrated Intello and IBM Watson for automated customer service and real-time event handling.

Written up as engineering case studies at aqibchattha.com/work.

Recognition

1st Position — Stars of the Month, Release 25.12 (Engineering), i2c Inc. Also placed in the Top Ten.

Outstanding Performance Award, i2c Inc. AGM 2025.

Stack

Java 8/11/21 · Spring Boot · Spring Batch · Spring Cloud · AOP · Kafka · Redis · JCS · Informix · MS SQL Server · Docker · Linux

Previously C# / .NET — ASP.NET, Entity Framework, MAUI Blazor, WPF.

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