PianissimoFortissimo
Aron Eustaquio
Senior Full Stack Software Engineer with nearly six years crafting high-performance, serverless products on AWS — currently building applications for Changi Airport Group in Singapore. Quiet hands, loud code.
$ whoami
▍
$ cat location.txt
Marikina, Philippines 🇵🇭
$ npx play --dynamics pianissimo..fortissimo
~ play me ~
// 01 — skills
The Repertoire
AI Engineering
The loudest movement — building agentic systems on AWS.
- MCP
- Strands Agents
- Amazon Bedrock
- Bedrock Guardrails
- Amazon AgentCore
- Bedrock Knowledge Base
- Agents · Tools · Models
- Vector DBs (OpenSearch, S3)
- Embeddings & Chunking
- RAG tuning (top-k · top-p · temperature)
- Claude · Gemini · ChatGPT · Cursor
Frontend
Interfaces with rhythm — performant, typed, responsive.
- React.js
- Next.js
- TypeScript
- Redux Toolkit
- Zustand
- Vite
- Tailwind CSS
- SWR
- Zod
- Styled Components
Backend & Cloud
Serverless AWS architecture, composed with CDK.
- Python
- AWS Lambda
- AWS CDK
- Amazon Cognito
- DynamoDB
- API Gateway
- AppSync
- GraphQL
- S3
Quality & Workflow
The steady tempo underneath every release.
- Vitest
- MSW
- Biome
- Git
- CI/CD
- Agile
pp — the early movements, circa 2021
// 02 — experience
The Performances
2025 — present
Changi Airport Group
Senior Full Stack Software Engineer · Singapore
Senior full-stack engineering for high-availability airport operations systems.
- Lead delivery of new features across React.js, Next.js, and AWS serverless infrastructure, with scalability and reliability built in.
- Drive technical design decisions, architecture discussions, and code reviews that lift system performance and maintainability.
- Partner with business stakeholders, operations teams, and product owners to translate operational needs into shipped solutions.
- Own production support — troubleshooting and root-cause analysis for live systems where uptime is critical.
- Sharpen testing strategy, CI/CD pipelines, and coding standards to raise both stability and developer velocity.
- React.js
- Next.js
- AWS
- TypeScript
- CI/CD
2022 — 2025
Accenture
Software Engineer Senior Analyst · Taguig, Philippines
Cross-platform product engineering across web, mobile, and serverless cloud.
- Built and maintained scalable serverless backends with Python, JavaScript, and AWS Lambda.
- Crafted dynamic interfaces with React.js, Next.js, Redux, and Styled Components.
- Implemented secure authentication and authorization flows with Amazon Cognito across devices.
- Designed and consumed REST and GraphQL APIs via API Gateway and AppSync over DynamoDB and S3.
- Safeguarded releases with Vitest unit and integration coverage in an Agile, DevOps-driven workflow.
- React.js
- Next.js
- Python
- AWS
- GraphQL
- Vitest
2021 — 2022
ADEC Innovations
Full Stack Developer · Remote
Full-stack product features from Django APIs to responsive frontends.
- Shipped full-stack features with Django, Django REST Framework, and React.js.
- Built responsive UIs with Chakra UI and Bootstrap for desktop and mobile.
- Ran real-time communication channels with Django Channels and Firebase.
- Integrated Twilio SMS and SendGrid email services.
- Supported manual testing and production deployment to keep features stable and usable.
- Django
- React.js
- Firebase
- Twilio
- SendGrid
// 03 — achievements