Senior Fullstack Engineer

Job Summary

We are looking for senior fullstack engineers who own

systems, not just features, and who set the technical bar for a team – across

web frontend, backend/API, and mobile – in an agentic engineering environment

where AI coding agents do much of the typing and senior engineers direct,

review, and verify. At The company, a senior fullstack engineer is expected to

move confidently across the entire stack: React/TypeScript on the web, Node or

.NET on the API, React Native on mobile, and the observability, data, and CI/CD

around it all. Over this band you grow from consistent multi-team-quality

delivery (L7) to being someone the team relies on for architecture and

mentoring (L9). We're not looking for a specialist who happens to know a bit of

everything else. We're looking for engineers who genuinely enjoy the whole stack

and can be the person the team leans on regardless of which layer the hard

problem lives in this week.

Key Responsibilities

1. Systems Ownership

Own significant systems across web, API, and mobile

end-to-end – including their architecture,quality bar, and evolution

Break down loosely-scoped problems into clear, buildable

work for the team; make the call on what to build first and why

Shepherd features through to store release, not just to the

merge, when mobile is in play

Take on the hardest / riskiest work in the team when it

matters, and finish it

 2. Agentic Engineering Leadership

Set the pattern for how the team uses AI agents effectively:

specifications, prompts, review discipline, evals, guardrails

Improve the team's agent workflow measurably – throughput,

defect rate, review cost – and share the wins

Own the parts of the agent workflow that are load-bearing

for quality: verification harnesses, test coverage strategy, and the

humans-in-the-loop where they matter

3. Architecture & Cross-Team Design

 Shape API contracts, data models, and shared platform

concerns so that web, mobile, and other product teams can build without

stepping on each other

Represent the team in architecture discussions; write and

review ADRs; challenge decisions with evidence

Keep an eye on the seams: auth, sync, observability, feature

flags, release orchestration across web + mobile

Care about performance and cost at runtime and at scale, in

browser, server, and device

4. Quality, Security, & Reliability

Own the team's quality bar: what "done" means,

what CI must catch, what makes a release safe

Champion secure-by-default patterns across the stack – OWASP

for web/API, platform-appropriate practices for mobile

Be part of the on-call rotation for the systems you own;

treat incidents as first-class learning material, not blame

5. Coaching & Talent Growth

Deliberately coach mid and junior engineers, code review is

a teaching moment first, a gate second

Grow the fullstack range of engineers around you; a senior

fullstack engineer who leaves the team broader than they found it is doing the

job

Contribute to hiring: technical interviews, take-home

reviews, calibration

6. Product & UX Partnership

Partner with Product and Design early – shape requirements,

push back on ambiguous scope, offer credible alternatives

Bring genuine user perspective to your work; senior

engineers here don't hide behind the ticket

Qualifications

6+ years of professional software development, including

shipped and maintained production systems across multiple stacks

Real fullstack depth: strong in web (React/TypeScript),

strong in a backend (Node or .NET), and hands-on shipped experience with React

Native or equivalent mobile – or a track record of picking up whichever of

these you're weakest in fast

You've led at least one significant piece of work from

problem to production, coordinating others' contributions

Serious agentic engineering practice: not just "I use

Copilot," but a considered opinion on how to make a team of engineers +

agents deliver reliably

Fluent with testing strategy, CI/CD, observability, and

secure coding across the stack

Clear written and spoken communication; you can carry a

technical proposal to non-engineers and to a room of engineers who disagree

Highly regarded: mobile release engineering experience (App

Store / Google Play), or UX depth strong enough to co-design product surfaces

A plus: experience with connected devices, BLE, or IoT

Based near Clark, Pampanga, or willing to relocate (this is

an on-site role)