Christian Dave Montalban logo
About

Christian Dave
Montalban

Full-stack platform engineer connecting product-facing web and mobile experiences with the backend, cloud, and AI systems that make them reliable.

Senior Full-Stack Platform EngineerPhilippines (UTC+8)
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Christian Dave Montalban
Senior Full-Stack Platform Engineer
Philippines (UTC+8)
Background

I'm Christian, a full-stack platform engineer based in the Philippines. My strongest work sits across the whole delivery path: product surfaces, mobile apps, APIs, backend services, cloud infrastructure, and the release systems that keep teams moving.

I have led backend architecture for education platforms, modernized React Native and Expo apps through major SDK upgrades, supported Shopify and Tapcart transitions, and decomposed monoliths into AWS serverless services with Terraform, queues, retries, idempotency, and observability.

That range matters because product problems rarely stay in one layer. A slow checkout, broken mobile flow, fragile API, missing metric, or risky release all need someone who can trace the system end to end and make the smallest safe change.

Right now I'm focused on full-stack AI-assisted platforms: clean service boundaries, practical web and mobile workflows, secure identity, production AI evaluation, and engineering habits that make teams faster without making systems brittle.

60%

faster releases through CI/CD guardrails

40%

runtime performance gain in production apps

2.7 -> 4.7

mobile store rating recovery

14x

increase in review submissions

Full-stack impact

Product-facing full stack

I work across React, React Native, Expo, APIs, and product workflows so user-facing changes stay connected to real backend constraints.

Backend and cloud architecture

I design service boundaries, data models, queues, auth, and cloud infrastructure for systems that need to scale without becoming opaque.

Modernization without drama

I have handled SDK upgrades, platform migrations, and monolith decomposition with staged changes, tests, rollback paths, and visible progress.

AI-assisted delivery

I use AI where it helps engineering teams: QA generation, triage, feasibility planning, retrieval workflows, evaluations, and safer automation.

How I work
  • 1Start from the product workflow, then choose the right boundary across UI, API, data, and infrastructure.
  • 2Prefer small, reversible migrations over big-bang rewrites when users and teams are already depending on the system.
  • 3Make releases observable: logs, traces, Sentry, metrics, tests, and CI/CD checks should explain what changed.
  • 4Use AI as a delivery multiplier, not a black box: keep reviews, evaluations, and human ownership in the loop.
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Experience
Experience Timeline

Career built through platform migrations, product delivery, and AI systems

MySchoolSuite logo
01Platform + AI Systems

Backend Tech Lead

MySchoolSuite · Iloilo, Philippines

Jan 2026 - Present

Leading backend architecture for a multi-product education platform, shaping the service boundaries, identity layer, and production AI workflows behind school operations software.

Multi-product platform deliveryAzure OpenAI production workflowsAuth0 + Supabase identity
  • Led backend architecture for systems covering slip generation, uniforms, stores, and other operational workflows for schools and students.
  • Built scalable services with NestJS, Prisma, PostgreSQL, and Azure while defining service boundaries and data models for rapid product expansion.
  • Co-architected AI workflows on Azure OpenAI and Azure AI Foundry, with Azure AI Search, Content Safety, Prompt Shields, and the Azure AI Evaluation SDK.
NestJSPrismaPostgreSQLAzureAuth0SupabaseAzure OpenAI
Vitable logo
02Migration + Delivery Velocity

Senior Mobile Engineer (FullStack)

Vitable · Australia

Nov 2022 - Sep 2025

Owned high-risk modernization work across backend, mobile, platform, and release engineering, turning a legacy stack into a scalable microservices + Expo delivery system.

60% faster releases40% runtime gainStore ratings 2.7 to 4.714x more review submissions
  • Tech-led the monolith to AWS serverless microservices migration across TypeScript, Lambda, API Gateway, DynamoDB, SQS/SNS, and IAM, with retries, idempotency, and DLQ guardrails.
  • Re-architected backend integrations for the move from custom React and React Native apps to a unified Shopify + Tapcart ecosystem with versioned APIs and secure webhooks.
  • Modernized the mobile platform from a custom React Native setup to Expo SDK 36 through 50 with phased rollouts and zero downtime.
  • Built Bitbucket CI/CD with gated checks and trunk-based workflows, then proposed AI-assisted QA generation, test triage, and feasibility planning to accelerate delivery.
TypeScriptNode.jsAWS LambdaAPI GatewayDynamoDBTerraformExpoBitbucket Pipelines
VOLY Australia grocery delivery logo
03Federated Backend Systems

Senior Software Engineer

Voly · Australia

Jul 2022 - Nov 2022

Built and operated microservices on GCP while tightening GraphQL schema design, backend performance, and internal inventory tooling.

30% productivity increase40% faster response times50% fewer stock-outs
  • Led backend development for a microservices architecture on GCP Cloud Run and Postgres using NestJS, Apollo Federation, and TypeScript.
  • Owned and optimized a federated GraphQL API, improving schema design and query performance for faster product delivery.
  • Designed a real-time inventory management system on Appsmith backed by TypeScript and Postgres for more accurate operational data.
GCP Cloud RunPostgresNestJSApollo FederationTypeORMAppsmith
Code Disruptors logo
04API Quality + Team Delivery

Jr. Fullstack Developer

Code Disruptors Inc. · Philippines

Feb 2022 - Aug 2022

Worked across backend delivery, cross-functional collaboration, documentation, and test automation to make APIs easier to build, review, and ship.

30% faster onboardingBetter API contractsHigher backend test coverage
  • Aligned with product managers, stakeholders, frontend developers, and QA testers on backend requirements and delivery tradeoffs.
  • Implemented Swagger and OpenAPI documentation to reduce onboarding time and improve agreement on endpoints, types, and error responses.
  • Created Jest and Supertest unit and integration suites that prevented regressions across critical backend APIs.
Node.jsJestSupertestSwaggerOpenAPIAWS SES
05Community Leadership

CEO / Founder / Lead

Google Developer Student Club · Philippines

Jul 2021 - Jul 2022

Built a student tech community from the ground up, connecting learning paths, mentorship, industry access, and competition coaching.

112 active members340 event participants3 internship partner companies
  • Unified three tech courses at the University of San Agustin into one active developer community with 112 members.
  • Introduced five technologies and nine career pathways through talks, events, and community-led learning.
  • Mentored members in solution design and pitching, with one team reaching the top 10 in a national tech competition.
Community BuildingMentoringNotionGoogle WorkspaceEvent Leadership
PocketDevs logo
06Early Product Delivery

Associate Software Developer

PocketDevs · Philippines

Jul 2021 - Jan 2022

Contributed across frontend, backend, and internal delivery operations while learning how to ship production software with a team.

4 departments supportedCross-stack deliveryProduction launch experience
  • Developed a team management software solution used across four departments.
  • Maintained both frontend and backend areas of the web application stack.
  • Helped manage task distribution through Jira and shipped work that was integrated into the company's infrastructure.
FrontendBackendJiraTeam DeliveryWeb Apps