👨‍💻
BigJar Studio
Multimedia Tool Developer · AI Engineer · Australia

Yesith Abeysinghe

Building intelligent tools for creative industries — spanning media production, graphic design, games development, and music creation. 8+ years of engineering rigour paired with hands-on AI fluency, shipping products that real creatives use.

Multimedia Tool Developer AI Engineer Games Developer AI Solutions Architect LLM Developer Systems Analyst DevOps / Cloud
Get in Touch ← Back to Studio
Professional Summary

About Yesith

Yesith designs and builds intelligent tools for creative professionals — spanning media & graphic design, games development, and music production. Through BigJar Studio, he ships software that fits naturally into creative workflows rather than forcing generic solutions onto specialist industries.


With 8+ years as an Analyst Programmer and Systems Analyst — most recently at Nissan Financial Services Australia — every tool is engineered to production standards with genuine software discipline. Creative-industry insight is paired with hands-on AI fluency across Claude 4, GPT-5, Grok 4, Llama 4, and Gemini 3.


Specialising in full-stack product development, LLM API integration, games development in Unity, and workflow automation — across a cloud engineering foundation in Next.js, Node.js, Microsoft Azure, and AWS. From a live AI astrology platform to Unity game projects, the through-line is building things that actually ship and work for real users.

Built & Shipped

Projects & Products

Live in Production Flagship Product

🔮 Cosmic Oracle

Live production AI astrology platform with 4 reading modes and 37+ language support. Built on Next.js with multi-model LLM API integration, serving real users globally. Demonstrates the complete AI-to-production pipeline — prompt engineering, API integration, full-stack architecture, and global deployment.

Next.js LLM API 37+ Languages Full-Stack Multi-Model Production
Visit cosmicoracle.space →
Live

📊 AI SEO Audit & Management Tool

Full-stack web application that automates SEO health analysis and generates AI-driven recommendations via a live interactive dashboard.

Full-Stack AI Analysis Dashboard Automation
In Development

💬 AI Customer Support Agent

LLM-powered conversational support agent with RAG grounding, intent detection, context memory, and human escalation logic.

RAG LLM Intent Detection Conversational AI
In Development

📚 RAG Knowledge Bot

Full RAG pipeline for natural language querying of internal documents and knowledge bases, with source attribution and context grounding.

RAG NLP Vector DB Knowledge Base
In Development

⚡ Workflow Automation System

AI-agent-driven automation engine that orchestrates multi-step business tasks via intelligent trigger-action pipelines, reducing manual overhead significantly.

AI Agents Automation Orchestration Pipelines
In Development

🕵️ Multi-Agent Research Tool

Collaborative multi-agent system with specialised Planner, Researcher, and Synthesiser agents producing structured intelligence reports.

Multi-Agent AI Orchestration Research Reports
In Development

🏢 Industry-Specific AI SaaS Platform

Multi-tenant SaaS product with domain-tuned LLM behaviour, onboarding flows, and subscription management for industry verticals.

SaaS Multi-Tenant Fine-tuning Subscriptions
In Development

📈 AI Analytics Dashboard

Natural language querying over business data with AI-generated charts, anomaly detection, and narrative commentary for non-technical users.

NLP Querying Data Viz Anomaly Detection BI
In Development

✍️ AI SEO Content Strategist

End-to-end content intelligence: keyword research, AI brief generation, content scoring, and editorial calendar planning.

SEO Content AI Keyword Research Strategy
In Development

🎮 Unity AI Games

Game projects developed collaboratively with Claude AI, exploring AI-assisted design, procedural content generation, and intelligent NPC behaviour.

Unity C# Procedural Gen AI-Assisted
Technical Stack

Tools & Platforms

🤖

LLMs & AI Platforms

Claude 4 (Anthropic) GPT-5 / ChatGPT Grok 4 (xAI) Llama 4 (Meta) Gemini 3 (Google) GitHub Copilot
🧠

AI Engineering

Prompt Design & Optimisation Multi-Model Orchestration AI Agent Configuration RAG Pipelines LLM API Integration Fine-tuning
💻

Full-Stack Development

Next.js Node.js JavaScript C# VB PowerShell SQL
☁️

Cloud & DevOps

Microsoft Azure AWS Azure DevOps CI/CD
📊

Data & Reporting

Power BI Crystal Reports SQL Server
🎨

Creative Industry Tools

Unity (Game Engine) C# (Unity Scripting) Ableton Live Adobe Creative Suite Procedural Generation AI NPC Logic DAW Integration
🎓

Specialisations

Multimedia Tool Development Games Development Cybersecurity Project Management Systems Analysis Enterprise Integration
Work History

Professional Experience

Most Recent

Analyst Programmer & Systems Analyst

Nissan Financial Services Australia

Senior software engineering role spanning analysis, development, and systems integration across enterprise finance systems. Responsible for full development lifecycle — from requirements and architecture through to deployment and support. Delivered reporting solutions, workflow automation, and data pipeline work across cloud and on-premises environments.

8+ Years Total

Analyst Programmer

Various Enterprise Roles

8+ years of professional software engineering across enterprise, finance, and technology sectors — spanning systems analysis, full-stack development, cloud platforms (Azure, AWS), reporting (Power BI, Crystal Reports), and database engineering (SQL Server). That rigour now drives AI engineering and LLM product development at BigJar Studio.

Now

Founder & AI Engineer

BigJar Studio

Designing, building, and launching AI-powered products independently — from live SaaS platforms to multi-agent research systems. Shipping solutions across the full stack: LLM integration, RAG pipelines, autonomous agents, cloud deployment, and front-to-back development. Actively open to freelance engagements and consulting while growing the BigJar product portfolio.

Education

Academic Background

🎓

Bachelor of Information Technology

Deakin University
Majors: Cybersecurity & Games Development
📋

Advanced Diploma of Project Management & Leadership

AllBright Institute
Project planning, delivery frameworks, leadership & stakeholder management
Visa & Availability

Work-authorised in Australia. Available immediately.

Currently holding a Subclass 482 (TSS) visa — work-authorised immediately. Actively seeking an employer to sponsor a 482 transfer or 186 (ENS) nomination. Open to roles anywhere in Australia — on-site, hybrid, or fully remote.

Prompt Engineer AI Officer AI Engineer AI Solutions Architect LLM Developer Systems Analyst DevOps / Cloud Engineer
482 VISA
HOLDER
AU

Let's work together

Whether you're looking to hire, collaborate, or explore a project together — get in touch.

yesith111@gmail.com LinkedIn →