NFNisal Fonseka
Colombo · Sri Lanka
AI Engineer · Full-Stack Developer

I build intelligent software products.

From LLM and RAG systems to complete full-stack products, I engineer the path from an ambitious idea to reliable software.

AI ENGINEERINGRAG SYSTEMSFULL-STACKPRODUCT ENGINEERING
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AI ENGINEERINGLLM / RAGFULL-STACK DEVELOPMENTPRODUCT ENGINEERINGSINHALA NLPAI ENGINEERINGLLM / RAGFULL-STACK DEVELOPMENTPRODUCT ENGINEERINGSINHALA NLP
300+students reached through an AI platform
Multi-LLMOpenAI · Anthropic · xAI
87.7%sentence-level grammar correction accuracy
End-to-endAI · backend · interface · deployment

Selected work

01

SLIIT AI Assistant

Enterprise AI platform supporting multiple assistants across departments.

Multi-LLMRAGVoice
300+students reached
02

SLIIT Academic AI

Module-aware learning support grounded in academic material.

RAGEducationFull-Stack
RAGgrounded learning
03

SinAI

Style-controlled language research for Sinhala newspaper writing.

Sinhala LLMLoRAUnsloth
87.7%sentence accuracy
04

SamadhiRice.lk

A complete digital commerce product for a Sri Lankan rice brand.

Next.jsE-commerceAI
01end-to-end product
05

Cravely

A food-delivery platform designed around independently deployable services.

MicroservicesDockerKubernetes
05service domains

What I build

01

AI Engineering

Reliable AI features designed as part of a complete software system.

02

RAG & AI Assistants

Domain-specific assistants grounded in your own knowledge.

03

AI Product Development

From an AI idea to a usable, production-oriented product.

04

Full-Stack Development

End-to-end web applications with strong product foundations.

Experience

Sep 2025 — Present

Software Engineer Intern

SLIIT Faculty of Computing

Building AI-powered software across multi-model orchestration, retrieval, voice, administration and full-stack product engineering.

Jan 2025 — Jul 2025

Software Engineer Intern

Sri Lanka Telecom

Contributed to software work in an enterprise telecommunications environment and gained experience with operational systems.

2023 — 2025

Full-Stack Developer

Independent

Designed and delivered web applications across frontend, backend and deployment for varied product needs.

Full experience

SinAI research

Style-controlled large language model research for diverse Sri Lankan newspaper writing, focused on Sinhala grammar correction and evaluation grounded in real editorial text.

Explore the research
87.7%Sentence accuracy
75.0%Real-news paragraphs
~700kSinhala news articles

Engineering notes

06 Oct 20266 min

Designing multi-LLM products without vendor lock-in

21 Sep 20267 min

Keeping RAG and product data together with PostgreSQL

11 Aug 20265 min

Evaluating Sinhala grammar correction beyond one score

Recognition

Abstract editorial graphic representing Sinhala language model research
Research milestone2026

Sinhala language research

Grammar-correction research for SinAI reached 87.7% sentence-level accuracy and 75.0% on real-news paragraphs.

Abstract grid graphic representing a growing community of students
Product milestone2025

300+ student reach

An AI platform moved beyond prototype status to support learning workflows for more than 300 students.

Abstract systems diagram representing AI engineering work
Professional milestone2025 — Present

AI engineering at SLIIT

Engineering production-oriented AI systems across retrieval, multiple models, voice and full-stack product development.

Engineering the whole product.

I work across the AI layer, backend, database, authentication, interface and deployment—because useful AI depends on the complete system around it.

About meVisit the lab