Building Rapio from Zero
How the concept for a wedding vendor management platform evolved from a set of workflow frustrations into a working SaaS architecture.
SaaSProduct DesignNext.jsArchitecture
· 5 min readJATIMULYO / INDONESIA// OBSERVATORY 01
Building software,experimentingwith ideas.
JTM Labs is an independent software laboratory from Jatimulyo, Indonesia, building software, experiments, and digital products.
01 / SOFTWARE
02 / EXPERIMENTS
03 / PRODUCTS
OPERATIONAL
OBSERVATORY MANIFESTO // 001
“Anindependentsoftwarelaboratorywheresystemsareobserved,ideasaretestedrigorously,anddurabledigitalsoftwareisshippedtoproduction.”
JTM LABS / JATIMULYO, ID
01/Selected Projects
All Projects ArchiveSoftware built at JTM Labs
A curated catalog of applications and digital products engineered with craft and released to production.
01/SaaS · Web · AIIN DEVELOPMENT
Rapio
Vendor management platform for the wedding industry.
OBJECTIVE // Wedding vendors often juggle client details across messaging apps, spreadsheets, and calendar reminders. Disconnected communication leads to missed deadlines and disorganized scheduling during peak wedding seasons.
Next.jsTypeScriptTailwind CSSSupabasePostgreSQL
INSTRUMENT // RAPIOSPEC 01
COORD: JTM/01STATUS: IN DEVELOPMENT
Rapio Architectural Core
Next.js · TypeScript · Tailwind CSS
BUILD: 2026.08TARGET: PRODUCTION
02/Productivity · WebPROTOTYPE
Focus One
A productivity system built around focused, single-task work.
OBJECTIVE // Traditional productivity tools encourage complex backlog organization and multi-tasking rather than actual execution, creating cognitive overload and friction before getting into deep work.
ReactTypeScriptTailwind CSSIndexedDBWeb Audio API
INSTRUMENT // FOCUS-ONESPEC 02
COORD: JTM/02STATUS: PROTOTYPE
Focus One Architectural Core
React · TypeScript · Tailwind CSS
BUILD: 2026.08TARGET: PRODUCTION
03/Education · WebLIVE
German Flashcard
A lightweight German vocabulary learning experience.
OBJECTIVE // One of the most persistent hurdles in learning German is mastering grammatical gender (der, die, das) and case agreements. Existing apps often bury rapid drill practice beneath complex gamification.
Next.jsTypeScriptTailwind CSSWeb Speech API
INSTRUMENT // GERMAN-FLASHCARDSPEC 03
COORD: JTM/03STATUS: LIVE
German Flashcard Architectural Core
Next.js · TypeScript · Tailwind CSS
BUILD: 2026.08TARGET: PRODUCTION
02 / ACTIVE BUILD TELEMETRY
OBSERVATION DECK // ACTIVE BUILDTELEMETRY 01
CURRENTLY BUILDING // PRIMARY FOCUS
Rapio
Vendor management platform for the wedding industry.
A centralized platform designed to help wedding vendors manage bookings, schedules, client communications, and deliverables.
Next.jsTypeScriptTailwind CSSSupabasePostgreSQL
STATUSIN DEVELOPMENT
TIMELINE2026
DEPLOYMENTNEXT.JS + RLS
03/The Lab
Explore Lab ArchiveExperiments & Prototypes
Raw laboratory notes, proof-of-concepts, and explorations across AI agents, neural voice, and developer automation.
01/AI & Automation· 2026
AI Agent Workflow
An experiment testing structured JSON schema constraints and multi-turn verification loops for LLM-driven coding assistants.
OBSERVATION // Single focused agents with strong deterministic tooling and explicit rollback mechanisms outperform complex multi-agent setups for practical development tasks.
02/Voice & Speech· 2026
Multilingual Voice Lab
An experimental exploration into streaming WebSocket audio pipelines for real-time Indonesian and English voice synthesis.
OBSERVATION // Natural speech synthesis requires small semantic units rather than raw token streaming.
03/Developer Tools· 2025
Local Automation Pipeline
A lightweight set of Zsh and Node.js hooks designed to automate linting, bundle size checks, and snapshot generation on git pre-commit.
OBSERVATION // Tiered validation works best: instant type/lint on pre-commit, full static build check on pre-push.
04/Lab Notes
All PublicationsTechnical writings & observations
System design decisions, architecture reflections, and engineering lessons learned in the workshop.
What I Learned Building an Autonomous AI Agent
Key architectural observations on determinism, JSON schema enforcement, and tool verification loops in agentic software.
AIAgentsTypeScriptEngineering
· 4 min readWhy I Chose Supabase for Rapid Prototyping
Evaluating PostgreSQL, Row Level Security, and auth velocity when building independent software products as a solo developer.
DatabasePostgreSQLSupabaseArchitecture
· 4 min read05 / ROOTS & IDENTITY
BUILTFROMJATIMULYO.
JTM Labs is an independent software laboratory based in Jatimulyo, Indonesia. We explore software engineering, autonomous AI workflows, and digital products—building useful things and documenting lessons openly.
PERSONNEL // BUILDERID: 01
Nuari
DEVELOPER & BUILDER
Running JTM Labs as an independent space for product experiments and deep engineering craft.
LOCATIONJatimulyo / ID
AFFILIATIONJTM Labs