Fullstack Software Engineer for AI Startup

bitbybit Studio; Jakarta Pusat; On-site; IDR 334,800,000 - 669,600,000; Full time

Job summary

bitbybit Studio in Indonesia is seeking a full-time engineer to build and scale an AI-powered WhatsApp platform across the stack, including backend, frontend, and mobile with React Native. You will own features end-to-end, integrate AI workflows via APIs, and focus on scalability and reliability using PostgreSQL, Kubernetes, and cloud-native tools.

Join a high-ownership team that ships production-ready applications, collaborates with product and design, and embraces rapid iteration to push

Qualifications

• Track record of shipping production-ready applications.
• Willingness to work with React Native.
• Bias for action — build, test, and iterate quickly.
• Hunger to learn — AI, scalable systems, and product design.

Responsibilities

• Fullstack development across back end and front end.
• Mobile contributions with React Native.
• End-to-end ownership from design to deployment.
• AI integration via workflows/APIs for real messaging use cases.
• Scalability and reliability with PostgreSQL, Kubernetes, and cloud-native tools.
• Front-end engineering with React/Next.js and Typescript.
• Monitoring and performance improvements.
• Collaborate closely with product, design, and AI engineers.

Job description

From Indonesia to the world: Join our pioneering team as we build at the frontier of AI, creating one of the first Agentic AI platforms for WhatsApp.

We're pioneering the next wave of AI-powered interactions at the intersection of AI agents, messaging platforms, mobile apps, and scalable cloud systems — enabling real-world impact at speed and scale.

VALUES

• Gets Sh*t Done — execution over excuses
• Continuous Improvement — we learn, adapt, and grow every day
• Stays Humble — we win as a team and keep the "Ilmu Padi" spirit

ROLE OVERVIEW

• Full-time, high-ownership role
• Build and scale our AI-powered WhatsApp platform across the stack (backend, frontend, and mobile with React Native)

KEY RESPONSIBILITIES

• Fullstack development across back end and front end
• Mobile contributions with React Native
• End-to-end ownership from design to deployment
• AI integration via workflows/APIs for real messaging use cases
• Scalability and reliability with PostgreSQL, Kubernetes, and cloud-native tools
• Front-end engineering with React/Next.js and Typescript
• Monitoring and performance improvements
• Collaborate closely with product, design, and AI engineers

NON-NEGOTIABLES

• Track record of shipping production-ready applications
• Familiarity or willingness to work with React Native
• Bias for action — build, test, and iterate quickly
• Hunger to learn — AI, scalable systems, and product design
• Humility — grow by listening and collaborating

BONUS SKILLS

• WhatsApp Business APIs or other messaging platforms
• Grafana/Prometheus or similar observability tools
• UX/UI best practices for web and mobile

AI-RELATED (NICE TO HAVE)

• Prompt engineering for LLMs
• Running AI evaluations
• Embeddings and vector search (e.g., LangChain or similar)
• Data preparation and analysis for AI applications

WHY JOIN US

• Impact from day one — your code ships fast and reaches real users
• Work on the cutting edge — deploy AI agents at scale
• Startup energy — small, focused team with high ownership and learning
• Global reach — build from Indonesia, for the world