Senior Full Stack Developer

Halosis; Jakarta Barat; On-site; IDR 100.000.000 - 200.000.000; Full time

Job summary

An innovative AI solutions provider in Jakarta seeks a Senior Full Stack Developer to design AI-powered applications and APIs. The role emphasizes hands-on leadership and involves integrating technologies like LLMs and Generative AI frameworks. Candidates should have significant experience in full stack development, especially in PHP, Node.js, or Python. This position offers the chance to drive impactful AI innovations in a growing startup environment.

Qualifications

• Minimum 5 years of professional experience as a Full Stack Developer.
• Strong proficiency in PHP Laravel, Node.js, or Python.
• Proven experience in AI or Generative AI development.

Responsibilities

• Design and develop full stack applications integrating LLMs, NLP, and Generative AI frameworks.
• Build scalable APIs and backend services.
• Implement intelligent front-end interfaces using React, Next.js, or Vue.js.

Skills

Full Stack Development

Generative AI Development

PHP Laravel

Node.js

Python

RESTful APIs

Cloud Platforms

Containerization

AI Chatbots

Tools

Docker

Kubernetes

OpenAI API

Hugging Face

LangChain

Job description

We’re looking for an experienced Senior Full Stack Developer with a strong background in Generative AI development to join our product engineering team.

You will help with the design and development of AI-powered applications and APIs, integrating them into Halosis’s core platform and helping shape the next generation of conversational and automation technologies.

This is a hands‑on technical leadership role — perfect for someone who thrives at the intersection of AI innovation, scalable architecture, and real‑world impact.

Responsibilities

• Design and develop full stack applications integrating LLMs, NLP, and Generative AI frameworks
• Build scalable APIs and backend services using PHP Laravel, Node.js, or Python (FastAPI/Flask)
• Implement intelligent front‑end interfaces using React, Next.js, or Vue.js
• Collaborate with data and product teams to design, train, and deploy AI models for automation, chat, and content generation
• Optimize performance, scalability, and security across the stack
• Lead code reviews, provide technical mentorship, and uphold engineering best practices
• Explore and adopt new Gen AI tools and frameworks (OpenAI, Anthropic, LangChain, Hugging Face, etc.)

Requirements

• Minimum 5 years of professional experience as a Full Stack Developer
• Strong proficiency in PHP Laravel, Node.js, or Python
• Proven experience in AI or Generative AI development (OpenAI API, Hugging Face, LangChain, or similar frameworks)
• Strong knowledge of RESTful APIs, microservices architecture, and database design
• Experience with cloud platforms (AWS, GCP, Azure) and containerization (Docker/Kubernetes)
• Excellent problem‑solving, analytical, and architectural skills
• Strong collaboration and communication abilities
• Experience developing AI chatbots, virtual assistants, or automation systems
• Knowledge of vector databases (Pinecone, Chroma, Weaviate)
• Familiarity with prompt engineering and fine‑tuning LLMs
• Contributions to open‑source AI projects

Halosis is an award‑winning startup that creates conversational commerce solutions with AI. If you want to be a part of the AI revolution, come and join us!