Developer
Client copy
Josthin Ayón
Full stack software engineer
I build custom software for businesses and deliver it in production.
I design and build end-to-end systems, from cloud infrastructure and APIs to the frontend, with Java, Node.js and TypeScript on AWS and Azure. I use AI inside the development workflow: specifications first, and agent workflows adapted to each project.
Latest delivery
React framework for micro frontends
for Grupo Difare
Developer details
Main stack
- Java
- TypeScript
- Node.js
- Python
- Spring Boot
- NestJS
- React
- Next.js
- AWS
- Azure
Location
Guayaquil, Ecuador
Remote · UTC−5
Coding since
Jun 2022
4 years, 4 months
Delivered projects
Three delivered projects: what I built, what with, and where it stands today.
No.
01
Project
React framework for micro frontends
My own framework joining TanStack, React Router and React Hook Form. With it, Ronald Preciado builds an admin dashboard in under two hours. Grupo Difare acquired it for its technology migration.
Stack
- React
- TanStack
- React Router
- React Hook Form
Status:
AcquiredNo.
02
Project
Security layer for a GraphQL API
I redesigned the security of a Postgraphile API by combining controlled introspection with GraphShield, protecting the data end to end.
Stack
- GraphQL
- Postgraphile
- GraphShield
Status:
DeliveredNo.
03
Project
AI agent for everyday small spending
An agent that logs the small purchases of each day and gradually teaches people to keep them in check. It works without downloading any app. Angie, Magaly and Danna sign for it below.
Stack
- AI agent
- Spending analysis
Status:
In production
What I work with
Languages
- Java17 – 25
- TypeScript
- JavaScript
- Python
Backend
- Spring Boot
- Quarkus
- NestJS
- Node.js
- Express
Frontend
- React
- Next.js
- Angular
- HTML5
- CSS
Cloud & infrastructure
- AWSLambda · CDK · Bedrock
- AzureDevOps · APIM
- Docker
- KubernetesEKS
- Traefik
Data
- PostgreSQL
- MongoDB
- Oracle DB
Security & quality
- JWT
- OAuth2
- Snyk
- StackHawk
- SonarQube
Continuous delivery
- Git
- GitHub Actions
- n8n
How I work
- Kanban
- Scrum
- DDD
- Microservices
- Multi-tenant
- BIAN
- SDD
- AI agents
Received in good order
Eight people who received the work or worked alongside me, and sign for it with their own names.
Project 01
React framework
“With the React library in place, building my admin dashboards took less than 2 hours. It's impressive.”
Signed byRonald PreciadoSoftware Engineer
Project 03
Spending agent
“With the spending app I was able to control my monthly expenses more consciously. It really makes you aware of what we do with our money.”
Signed byAngie ArgudoData Engineer“Being able to track my spending automatically saved me a lot of time, because I don't have to open an app to log anything. It's wonderful.”
Signed byMagaly CastilloUser“I really like the way I manage my expenses now. I didn't even have to download an app.”
Signed byDanna BailonUser
Team
Working together
“Working with Josthin was a privilege. He communicates clearly, is always willing to help the people around him, and shares what he knows in creative ways.”
Signed byKelvin VargasSoftware Project Lead“Having Josthin as a colleague means product quality comes before features. You will never get a half-finished solution or technical debt from him.”
Signed byGuillermo ZevallosSoftware Project Coordinator“Communication with Josthin is clear and friendly. Testing his components was never a headache: everything is well documented and meets quality and usability standards.”
Signed byFranklin CampoverdeQA Engineer“Having Josthin as a guide is a privilege. He always backs you with whatever you need to move forward.”
Signed byJaneor LoorDatabase Engineer
What I can build
Tick what you need and I'll carry it into your request. Nothing ticked yet
Request a project
Tell me what you need built. I'll reply soon, by email.