Hari Krishnan
Polyglot Full Stack Developer and Architecture Consultant, Lean and XP Coach
Bengaluru, India
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Co-creator of Specmatic and Perfiz. I also advise organisations both large and small on their transformation journey. Apart from bringing ideas to life as working software products, I coach developers, project managers, product owners and engineering leaders.
I have spoken at several conferences including API Days (New York 2025, Paris 2024), Developer Week San Jose 2024, NorderAPIs Platform Summit 2024, GoTo Copenhagen 2024, AACoT (2024, 20223), API Specification Conference (#ASC2022), API World 2022, SeleniumConf, Agile2021, Agile India, TestingUY 2021, SREConf, PyCon Singapore, RubyConf India. My areas of interest include distributed systems, concurrency, high performance application architecture, coaching and training.
Area of Expertise
Topics
APIDays New York
Using GraphQL SDL Files as Executable API Contracts - https://speakerdeck.com/harikrishnan83/using-graphql-sdl-files-as-executable-api-contracts
Unifying OpenAPI & AsyncAPI: Designing JSON Schemas + Examples for Reuse - https://speakerdeck.com/harikrishnan83/unifying-openapi-and-asyncapi-designing-json-schemas-plus-examples-for-reuse
Agile India 2025
API Design Anti-patterns: How to identify & avoid them - https://www.youtube.com/watch?v=U1Di4RyyG4w
DeveloperWeek 2025 Sessionize Event
Functional Conf 2025
The Functional Fix: Kotlin Error Handling Made Elegant - https://www.youtube.com/watch?v=byIcRxtk6gA
APIDays Paris
Contract-Driven Development for Event-Driven Architectures (https://conference.asyncapi.com/venue/Paris)
Slides - https://speakerdeck.com/harikrishnan83/contract-driven-development-for-event-driven-architectures
AsyncAPI Online Conference Edition
Using API spec as an Executable Contract To Mock and Test Microservices
Video - https://www.youtube.com/watch?v=wiM20HTCerM
Slides - https://speakerdeck.com/harikrishnan83/asyncapi-as-executable-contracts
AsyncAPI Conf On Tour 2023
Kafka and JMS Mocking with AsyncAPI using Specmatic
Video - https://youtu.be/9yRf75p_kTU?si=iR4lV_HLaVlUKsrY
AsyncAPI allows us to articulate communication channels between services clearly. What if I told you that this AsyncAPI specification is all it takes for us to quickly spin up mock topics and queues to test our services in isolation?
That is exactly what Specmatic is able to achieve by leveraging AsyncAPI specifications to give us early feedback on our local machines and in our CI pipelines when our service implementations deviate from the API specifications.
In this talk, I will be going over below points in detail:
1. Ability to detect deviation in implementation at a protocol, schema and more during early stages of development to shift left the identification of potential integration issues.
2. Leveraging AsyncAPI specifications to collaborate between teams to develop and deploy microservices in parallel with confidence.
3. How this ability fits into the overall concept of Contract Driven Development.
API World 2022 Sessionize Event
API Specifications Conference 2022
Turn Your OpenAPI Specifications into Executable Contracts
Event - https://sched.co/15pVN
Video - https://youtu.be/U5Agz-mvYIU?si=IbXcmiqrhuYOSLcU
Selenium Conf 2022
Contract Driven Development - Deploying your MicroServices independently without integration testing
TestingUy 2021 Sessionize Event
Agile 2021
Abstract / Teaser - https://vimeo.com/551960536
Video - https://www.youtube.com/watch?v=LaKhBS-_4p4
Hari Krishnan
Polyglot Full Stack Developer and Architecture Consultant, Lean and XP Coach
Bengaluru, India
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