JOIN THE TEAM

Build Responsible
Intelligence Infrastructure

Judgment does not scale. Execution does.
We are building the operating system that transforms organizational judgment into executable decision systems.

View Open Positions

13 engineering roles across 4 squads

ENGINEERING CULTURE

The MARIA Way

We are not building a powerful AI. We are building a responsible intelligence infrastructure. Strength is not the goal — resilience is. Autonomy is not the goal — controlled autonomy is.

01

We build systems that do not collapse.

02

Fail-Closed is our default.

03

Structure before speed.

04

Every decision must be replayable.

05

Tests define reality.

06

We do not unify contradictions. We surface them.

07

Observations may be automatic. Policies are not.

08

Boundaries are sacred.

09

We optimize for completion, not execution.

10

We design for the long horizon.

WHAT WE LOOK FOR

Not AI Enthusiasts.
Structural Engineers.

Understands abstract structures

You think in invariants, not implementations. You design boundaries before features.

Prioritizes invariants over specs

Specifications change. Invariants hold. You know which constraints must never break.

Reads logs without complaint

Logs are not noise — they are reconstruction material. You trace before you guess.

Chooses 'unbreakable' over 'fast'

Speed comes from structure. You build systems that do not collapse under pressure.

Can audit their own code

If you cannot explain every decision in your implementation, it does not belong in production.

Respects boundaries

Universe isolation, tenant separation, gate enforcement — you never bypass for convenience.

ORGANIZATION

Four Squads. One Mission.

13 engineers + 1 Product Owner across four specialized squads, each with clear ownership boundaries and shared engineering standards.

Platform Core

5 members

AI OS Core, Job Envelope, Harness, Memory I/F, Tool Router — the execution substrate every squad depends on.

Intelligence & Governance

4 members

Decision Pipeline, Approval System, Value Scanning, AI Reasoning — the brain of MARIA OS.

Reliability & Operations

3 members

Observable, Resilient, Compliant, Production-ready — scaling MARIA OS for enterprise.

Mobile & Distribution

1 members

React Native, Expo, EAS Build, Mobile approvals, Notifications — making MARIA OS usable from the field.

ENGINEERING STANDARDS

Non-Negotiable Rules

Type Safety

TypeScript strict mode. No `any`. No `as` casts without justification.

Quality Gate

bun run lint && bunx tsc --noEmit && bun run test && bun run build — all green or no PR.

API Contract First

OpenAPI spec -> types -> implementation. Never the reverse.

Fail Loud, Recover Gracefully

Structured errors with correlation IDs. Never swallow exceptions.

Tenant Isolation

Every query scoped by tenantId. Cross-tenant leak = Severity 0 incident.

Idempotency

All write operations must be safely retryable.

Immutable Audit

decision_transitions and evidence_bundles are INSERT-only. No UPDATE or DELETE.

TECH STACK

What We Build With

AI OS CORE

  • Bun
  • Next.js 16
  • TypeScript 5 (strict)
  • Job Envelope

STYLING & UI

  • Tailwind CSS v4
  • shadcn/ui
  • Framer Motion
  • Three.js

DATA & AUTH

  • Supabase (PostgreSQL)
  • Drizzle ORM
  • Supabase Auth
  • Redis

AI & TESTING

  • Vercel AI SDK
  • Google Gemini
  • Vitest
  • Playwright

OPEN POSITIONS

13 Roles. 4 Phases.

Hiring is phased. P0 roles start immediately. Each role has a unique MARIA coordinate — your address in the system you are building.

CODE REVIEW

Review Culture

  • PR SizeMax 400 lines. Stacked PRs for larger changes.
  • Turnaround< 4 hours during business hours.
  • Approval1 Peer + 1 Domain Lead for core engine changes.
  • No LGTMEvery review must include at least one substantive comment.
  • SecurityAuth / RBAC / Tenant changes require Owner sign-off.

TEAM RITUALS

How We Work

  • SprintBi-weekly planning (Mon, 60 min)
  • StandupDaily async written updates
  • Squad SyncWeekly, 30 min per squad
  • Arch ReviewWeekly (Fri), 45 min — all Leads + Owner
  • Demo DayBi-weekly (Fri), 60 min + stakeholders
  • SecurityMonthly review, 60 min
14-PERSON TEAM

Not a Flashy AI Startup.
A Structural Engineering Company.

MARIA OS is stronger when composed of people who guard invariants, respect boundaries, and write tests — rather than flashy AI researchers. If that is you, we want to talk.

Apply via Discord

owner: @bongin_max