OPERATIONAL - 7 TENANTS · AWS · REMOTE (ITALY)
I build the platformother engineers ship on.
The Terraform that provisions a multi-tenant utility SaaS, the API it runs on, and the product customers use - built and operated end to end.
Open to Staff / Lead platform roles · Remote from Italy (CET), async-first · US and EU teams
Selected work
7 case studies · 7 portals · 15 moreMore case studies
Three AI tools built and measured: a Claude reviewer kept where it earned its place, a Bedrock auto-fix shelved on evidence, and a ticket-to-PR pipeline designed with human gates and not yet run live.
Biopharma Strategy Platform →A DMMF-driven clone engine and a dependency-aware archive/restore system on an ISO 27001-certified strategy SaaS in private beta with enterprise pharma.
Observability & Accountability →Universal capture with redacted payloads, tiered audit retention, account-to-IP anomaly views, and a takeover alert - so a five-engineer team can answer who did what.
Identity & Access →Closed an account-takeover path at registration, took identity-provider credentials out of the browser, and moved route permissions into one declarative guard.
Fleet portals
7 tenant portals in production on the core API and control-plane.
▸ also shipped (4)
Multi-channel notifications - Twilio SMS + IVR voice and AWS SES email with CSV lists and templated messaging.
Batch pipeline syncing multi-account customers in 5K-record batches - idempotent, tracked, self-reporting.
Pipeline converting Oracle CCS reference docs into LLM training data - validated JSONL to S3/Bedrock.
Primary engineer on four tenant launches; core contributor on two.
▸ earlier work (11)
Wholesale food and beverage ordering and payments platform (contract).
Content authoring for the enterprise digital-experience platform - product features and test automation at scale.
Page and layout design tooling for the enterprise digital-experience platform - product features and test automation at scale.
GIS mapping and hunting platform.
Click-and-collect AGV system - IoT mobile app driving a robotic arm to fetch shop supplies, with a web tracker for job completion (React, React Native, Python).
Web application for buying and selling metal scrap (React, Express).
Photography, franchise and services web platform - portrait studio site and booking (React, Express).
Talent recruitment and management portal.
Package delivery mobile and web app for customers and riders, published on Google Play (Ionic, Adonis, AWS, Socket.io).
E-commerce marketplace app with raffles, messaging and a wallet on Android and iOS, published on Google Play (Ionic, Adonis, Socket.io).
Offline truck-delivery report mobile app (Ionic, SQLite).
Experience
2017 - presentStaff Software Engineer, Platform & Product
- Staff Software Engineer, Platform & Product · Sep 2025 - Present
- Senior Full-Stack Engineer (Cloud) · May 2023 - Aug 2025
- De-facto technical lead of a 5-engineer team, reporting to the COO/CEO: set the standards the fleet adopts, specify the CCS-side (IWS) changes the vendor team implements, own the team's AWS access as Terraform.
- Own ~$110K/yr of AWS across the production and test fleet - CI/CD, Datadog/CloudWatch observability, and FinOps tooling driving right-sizing and Fargate-Spot savings.
- Owned production go-live readiness for 6 client launches.
- Primary author of both generations of the fleet's core API - 58% of v1, serving all seven launched tenants; 78% of v2, in production for the first ahead of its cutover - and the auth and Oracle CCS patterns both share.
- Primary author (93%) of the internal developer platform: a Terraform control-plane (9 stacks, ~60 AWS resource types) with a Fastify/React dashboard, onto which the fleet's provisioning is migrating tenant by tenant.
- Rolled blocking Snyk gates across the portal pipelines, then keyless OIDC deploys - pilot, test envs, prod on 4 repositories - taking long-lived AWS credentials out of the deploy path.
- Shipped the fix for an SSN identity-verification gap enabling account takeover - wrong-person matches on ~2.4% of one tenant's accounts - as attempt lockout plus ZIP disambiguation, flag-gated for per-tenant rollout.
- Built a fleet-wide customer-interaction audit trail: tenant-scoped, IDOR-safe admin history API with CSV export and rate limiting, 90-day retention, later extended to admin reads and impersonated sessions.
- Built and measured the team's AI tooling: kept the Claude PR reviewer on the core API and backend, shelved the Bedrock auto-fix on evidence, shipped the knowledge-base agent.
- Designed and shipped a multi-account usage-extract feature (backend API + frontend modal) letting multi-account customers export combined billed usage as one CSV, closing an admin-bypass IDOR gap found in review.
Senior Full Stack Engineer
- One of 3 core engineers on an ISO 27001-certified biopharma strategy SaaS in private beta with enterprise pharma clients.
- Originated two subsystems from scratch: a DMMF-driven strategy clone engine and the Edge archive/restore isolation system.
- Contributed to real-time collaboration (GraphQL subscriptions), OpenAI-backed generation features, and platform security (OWASP/IDOR, JWT sessions).
- Originated a data-dependency subsystem - GraphQL contract, resolver, registry-driven modal - that warns before archiving or deleting finalised entities with dependents, then cascades the archive/restore across them.
- Built out the Edge brand-strategy module - Belief Shift, Narrative, and competitive-landscape recap tabs with per-group finalise - and instrumented its LLM-backed prompt generation with llm_event telemetry.
▸ earlier roles (6)
Operating principles
how the work gets doneBoring, proven tech.
Clever is what someone decodes at 3am. Standard library before a dependency, a dependency before a framework.
Root cause, not symptom.
Bugs get reproduced end to end before they get fixed. One guard in the shared path beats a patch in every caller.
Security is the default.
Every endpoint ships with authorization checks. IDOR is assumed possible until proven otherwise.
Smallest change that works.
Tight scope, flagged adjacencies, verified before commit. The best code is the code never written.
Capabilities
cloud → frontendCloud & Infra
- AWS - ECS Fargate, CloudFront, Cognito, RDS, ElastiCache, KMS, Secrets Manager, WAFv2, SES, S3, Route 53, VPC, ALB, Elastic Beanstalk
- Terraform
- Docker · Kubernetes
- Linux · OpenSearch
Platform & DevOps
- Internal Developer Platform
- Multi-tenant provisioning
- Bitbucket Pipelines · GitHub Actions
- FinOps - Cost Explorer
AI on the Platform
- AWS Bedrock (Claude)
- AIOps auto-remediation
- Agentic SDLC pipelines
- AI code review · LLM knowledge bases
Backend & Data
- Node.js - Fastify, Express
- TypeScript · Python
- REST APIs · GraphQL · Prisma
- PostgreSQL · MongoDB · Redis/BullMQ
- Oracle Utilities CCS · Invoice Cloud
Observability & Security
- Datadog RUM/APM · CloudWatch · Sentry
- Structured logging
- OWASP/IDOR · JWT · WAFv2 · Snyk
Frontend
- React · Redux
- TypeScript
- Styled Components · Tailwind
- Next.js
Contact
async-first · CETACCEPTING- STAFF/LEAD PLATFORM ROLES · CONSULTING · AWS / TERRAFORM / MULTI-TENANT
jajapabatao@gmail.com