Building specmatic.io | AI enthusiast | Polyglot | github.com/joelrosario | Musician
Joined April 2009
- Tweets 631
- Following 1,319
- Followers 228
- Likes 6,491
5 Photos and videos
Joel Rosario retweeted
2 Sep 2025
Guardrails for API Development: Guiding Coding Agents with Specmatic MCP linkedin.com/pulse/guardrail… @specmatic @OpenApiSpec #API #CodingAgents #ClaudeCode #MCP
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Joel Rosario retweeted
5 Jun 2025
The video from talk about "Unifying @OpenApiSpec & @AsyncAPISpec: Designing JSON Schemas Examples for Reuse" that @nashjain and I presented at @APIdaysGlobal New York is now live!
🎥 youtube.com/watch?v=bLfsqj4O…
📑 speakerdeck.com/harikrishnan…
@specmatic
@jsonschema
#APIs #APIDesign
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Joel Rosario retweeted
4 Feb 2025
The slides and videos from the talk that @finalprefix and I delivered at AsyncAPI Paris 2024 is here speakerdeck.com/harikrishnan…
@AsyncAPISpec @APIdaysGlobal @specmatic #AsyncAPIParis2024 #EDA #API
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Joel Rosario retweeted
5 Dec 2024
Interested in migrating smoothly from #AsyncAPI 2.6.0 -> 3.0.0 while getting an in-depth understanding of the request/reply pattern for #ContractTesting & mocking?
Today @HariKrishnan83 & @finalprefix share their insights at #APIDaysParis.
#Specmatic #CDD @AsyncAPISpec
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Joel Rosario retweeted
4 Sep 2024
Hey folks! Here is your chance to meet the #Specmatic team at #IndiaFOSS2024 in Bengaluru this weekend! Swing by the Specmatic booth and explore the possibilities of Contract Driven Development. See you there!
More about FOSS India: fossunited.org/indiafoss/202…
@fossunited
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Drumrolls, please!🥁🥁
Announcing @specmatic as the partner for #TestMuConf 2024 🔗 bit.ly/testmuconf_2024
Visit Specmatic's virtual booth to chat with their experts on Contract-driven Development and more. Also, get your hands on some intriguing freebies.🎁
#Conference
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Joel Rosario retweeted
27 Jun 2024
.@nashjain, @HariKrishnan83 and @finalprefix from the #Specmatic team facilitated a 2-day #AsyncAPI #hackathon at #DTWIgnite in Copenhagen. They also announced the launch of the much awaited #TMForum AsyncAPI specs.
@AsyncAPISpec @tmforumorg
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Joel Rosario retweeted
21 May 2024
Having trouble with #ContractTesting and maintaining #APIcontracts? Did you know you can use @AsyncAPISpec and #OpenAPI specs as #ExecutableContracts to generate a free battery of tests?
@HariKrishnan83 will share the secret tomorrow.
Register here: events.geekle.us/qa24/
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Joel Rosario retweeted
22 Apr 2024
Adoption of OpenAPI schema was sponsored by the awesome folks from @specmatic, who are using my library to provide the best AsyncAPI experience for converting specifications into executable contracts.
Kudos to @HariKrishnan83, @finalprefix, @nashjain and Jaydeep Kulkarni
20 Apr 2024
First RC is here🚀
Now you can use @OpenApiSpec, @jsonschema and Avro schemas in your @AsyncAPISpec V3 specifications
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Joel Rosario retweeted
15 Apr 2024
First time in Japan. Super excited to be presenting my experience on "Feature Toggle Promotion via CI/CD Pipeline" at @DevOpsDaysTYO #DevOpsDays #Tokyo. If you are in Tokyo on April 16-17, let's catch up!
confengine.com/conferences/d…
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Joel Rosario retweeted
15 Apr 2024
Start with the API: Understand the importance of designing your #API before diving into the coding. A well-defined API serves as a stable foundation, regardless of how implementation details may evolve. - @v1bhormahajan
#APIdesign #Microservices #Specmatic #APItesting #CDD
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Joel Rosario retweeted
9 Apr 2024
Using #APIspecifications as an unambiguous mechanism of communication between team members - @v1bhormahajan shares his experience.
#specmatic #SoftwareArchitecture #ContractDrivenDevelopment #TeamCommunication #Specmatic #CDD #ContractTesting #APItesting
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Joel Rosario retweeted
25 Mar 2024
I could never quite wrap my head around how to test SSR applications (@nuxt_js, @nextjs, @laravelphp, etc.) that talk to HTTP APIs (e.g., microservices). But then I learned about Contract Testing with @specmatic.
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Joel Rosario retweeted
19 Mar 2024
We’re thrilled to share the recording of @nashjain’s #YOW23 talk: Turning your #API Specification into #ExecutableContracts.
It’s a privilege to be featured on the #GoTo channel!
#Specmatic #ContractDrivenDevelopment #APItesting #SoftwareDevelopment
youtube.com/watch?v=7OvTanLj…
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Joel Rosario retweeted
16 Mar 2024
[VIDEO] "Contract Driven Development - Deploy Your MicroServices Independently Without Integration Testing" by @harikrishnan83 & @finalprefix at #AgileIndia 2022.
youtube.com/watch?v=ZXE0QGyQ…
#ContractDrivenDevelopment #ContractTesting #OpenAPI #ShiftLeft #ServiceVirtualization
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Joel Rosario retweeted
22 Dec 2023
.@nashjain showcasing the cutting-edge features of #Specmatic, a tool for #ContractDrivenDevelopment that turns your API specification into #ExecutableContracts, stubs out dependencies, & even provides intelligent service virtualization in seconds. Watch: specmatic.in/updates/introdu…
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Joel Rosario retweeted
23 Nov 2023
Independent development & deployment (IDaD) is the holy grail of #microservices, but achieving it is a challenge! @nashjain outlines 5 key practices you need to achieve IDaD
Full video: confng.in/ddnVUk4u
#AutomatedTesting #CICD #FeatureToggles #TrunkBasedDevelopment #CDD
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Joel Rosario retweeted
22 Nov 2023
In most organizations, the state of #microservices development and deployment leaves a lot to be desired. But could there be a better way?
Full video: confng.in/GTEQif_f
@nashjain #Specmatic #CDD
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Joel Rosario retweeted
25 Nov 2023
Don't miss this opportunity to catch-up with @nashjain, our Founder at the #YOW23 conference in Australia and hear from him how #ContractDrivenDevelopment and @specmatic can help you reduce your time-to-market.
25 Nov 2023
At #YOW23 I’ll showcase how we use #ContractDrivenDevelopment to leverage our @OpenApiSpec or @AsyncAPISpec with our #nocode tool @specmatic, to enable us to independently develop and safely deploy #microservices quickly.
Save 15% with code: jain15
yowcon.com/sydney-2023
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Joel Rosario retweeted
25 Nov 2023
At #YOW23 I’ll showcase how we use #ContractDrivenDevelopment to leverage our @OpenApiSpec or @AsyncAPISpec with our #nocode tool @specmatic, to enable us to independently develop and safely deploy #microservices quickly.
Save 15% with code: jain15
yowcon.com/sydney-2023
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