Open to opportunities

Sahan Nishshanka

@sahannishshanka

Message

I'm an AI architect and co-founder building scalable LLM platforms.

Germany

Message

What I'm looking for

I'm seeking a hands-on AI/ML architect role building production-grade LLM and agent platforms with ownership of product and infrastructure, in a collaborative company focused on scalability, efficiency, and measurable business impact.

I'm an AI architect and co-founder who builds production-ready LLM and AI agent platforms that reduce costs, improve efficiency, and scale to thousands of users. I combine backend and frontend expertise with DevOps practices to deliver end-to-end solutions.

At Coala AI I led the design and launch of a serverless AI agent platform, integrating LangChain, LangGraph, and RAG pipelines, and supported thousands of concurrent users while optimizing open-source LLMs for cost and performance. In research roles I developed advanced RAG models, fine-tuned multimodal models for edge deployment, and applied AI to manufacturing outcomes, cutting production costs by 10% and downtime by 20%.

I have a strong hands-on technical stack: Python, FastAPI, Node.js, React/Next.js, TensorFlow/PyTorch, LangChain, LlamaIndex, and vector DBs, plus cloud infrastructure on AWS and Azure with Terraform and CI/CD automation. My M.Sc. research focused on optimizing vision-language models for resource-constrained edge devices through quantization and parameter-efficient fine-tuning.

I'm results-oriented and experienced in product roadmapping, customer validation, and leading cross-functional teams. I enjoy solving hard infrastructure and ML engineering problems, shipping reliable products, and mentoring teams to achieve measurable business impact.

Experience

Work history, roles, and key accomplishments

Current

AI Architect and Co-Founder

Current

Coala AI GmbH

Jan 2025 - Present (9 months)

Led design and launch of Coala WebAssist, a serverless AI agent platform integrating LangChain, LangGraph and RAG pipelines, supporting thousands of concurrent users and enabling WordPress-based agent deployments for non-technical users. Applied predictive-maintenance AI to manufacturing, reducing production costs by 10% and equipment downtime by 20%.

Lang Chain LangGraph RAG AWS Lambda DynamoDB Terraform Next.js

Research Assistant

BIBA Bremer Institut für Produktion und Logistik GmbH

Feb 2023 - Mar 2025 (2 years 1 month)

Engineered high-performance GraphQL backends and conversation analytics to improve API scalability and enable data-driven KPI tracking. Developed RAG models and an LLM model manager to fine-tune open-source models and integrated LLMs into Rasa to improve NLU accuracy.

GraphQL Neo4j Python Docker LlamaIndex Tensorflow Lite Rasa

IT Officer

Ministry of Public Security

Dec 2020 - Mar 2022 (1 year 3 months)

Managed and maintained mission-critical IT infrastructure, enforcing IT policies to strengthen security, data protection, and regulatory compliance. Led IT modernization projects upgrading hardware and software to improve operational reliability and service delivery across departments.

Network Security System Administration IT Infrastructure Policies Windows Server Virtualization Disaster Recovery VPN Compliance

Founder / CEO / System Engineer

Keygen Security Pvt Ltd

Feb 2016 - Jan 2022 (5 years 11 months)

Founded and scaled a GPS tracking provider to serve 30,000+ vehicles by engineering IoT-based tracking systems with real-time MQTT data pipelines. Migrated services to AWS, led product development and supplier negotiations, and managed a cross-functional team to sustain growth and reliability.

MQTT GPS MongoDB PostgreSQL Flask Django AWS Docker

Education

Degrees, certifications, and relevant coursework

University of Bremen

Master of Science, Control, Microsystems and Microelectronics

2022 - 2025

Activities and societies: Thesis: Optimizing Vision-Language Models for Edge Devices; Selected projects: Smart Power Meter, Intelligent Power Socket, Mirror of Erised (social media filter-bubble analysis), Weather Forecasting System, Urban Mobile Air Quality Monitoring (GreenWheel).

M.Sc. in Control, Microsystems and Microelectronics with specialization in Artificial Intelligence, IoT, and Electronics. Master's thesis optimized vision-language models for edge devices using quantization and parameter-efficient fine-tuning to improve performance on resource-constrained hardware.

Sri Lanka Institute of Information Technology

Bachelor of Science (Special) Honours, Information Technology

2016 - 2020

Activities and societies: Implemented IoT Electrical Power Consumption Management System; Conference Management System; Intelligent Chess Game using machine learning; Thesis: RFID Based Theft Detection System for Automobile Parts.

B.Sc. Special (Hons) in Information Technology with specialization in Computer System and Network Engineering, completed project-based coursework and a thesis on an RFID-based theft detection system for automobile parts.