Resume

Senior Software Engineer for enterprise AI and deployed systems.

A recruiter-friendly view of experience, projects, technical scope, and target roles. The download button points to the PDF resume path in the public site.

Download Resume Contact

Chanaka De Silva

Senior Software Engineer / 11+ Years Experience

chanakadesilva31@gmail.com

https://github.com/devchan

https://www.linkedin.com/in/chanakakasun

Senior Software Engineer with 11+ years of experience building enterprise SaaS products, CRM platforms, workflow automation, cloud integrations, distributed applications, AI-powered solutions, and scalable backend architectures. Experienced in designing software that connects business workflows from lead generation to service delivery, including integrations with Microsoft Graph, Stripe, SendGrid, Google APIs, AI services, and enterprise cloud platforms.

Forward Deployed EngineerStaff Software EngineerSenior Software EngineerAI Solutions EngineerSolutions ArchitectTechnical Consultant

Experience

Professional history

Senior Software Engineer

Enterprise PropTech SaaS Company / Remote

2019 — Present

Led architecture and delivery of a multi-tenant field service management platform handling thousands of daily work orders across web and mobile clients.
Designed the Microsoft Graph email integration that replaced 15-minute IMAP polling with webhook-driven sync, cutting email-to-CRM latency to under 5 seconds.
Built an AI document processing pipeline (OCR, LLM extraction, RAG retrieval) that automated compliance document handling for 40k+ documents per month.
Introduced event-driven architecture with an outbox pattern across core services, eliminating a class of cross-service consistency bugs.

Software Engineer → Lead Engineer

Enterprise SaaS Consultancy / Colombo, Sri Lanka

2016 — 2019

Built an enterprise CRM platform (leads, pipelines, activities, reporting) adopted by 200+ sales users, integrating SendGrid, Google APIs, and telephony.
Designed a workflow automation engine with a visual builder, conditional branching, and queue-backed execution processing 1M+ actions per month.
Developed a lead analytics dashboard aggregating multi-channel attribution data with sub-second query performance via pre-aggregation and Redis caching.
Drove the migration of legacy monoliths to service-oriented architectures on AWS with Docker and CI/CD.

Software Engineer

Software Solutions Firm / Colombo, Sri Lanka

2014 — 2016

Shipped customer portals, booking systems, and payment integrations for a dozen client projects.
Built REST APIs and OAuth2-secured integrations connecting client systems to third-party platforms.
Progressed from junior to mid-level engineer while owning increasingly complex modules end to end.

Selected Work

Relevant case studies

Enterprise AI Invoice Processing Platform

A multi-tenant platform that ingests invoices, extracts structured data with AI, validates against business rules, auto-approves the confident cases and routes the rest to human reviewers — all behind a complete audit trail, similarity search, and an in-app AI assistant.

Enterprise Property Technology Platform

Multi-tenant SaaS platform powering property management for 200+ agencies across three markets, rebuilt from a monolith into domain-aligned services.

Field Service Management Platform

Event-driven job dispatch and scheduling platform coordinating 1,200 field technicians in near real time, with offline-tolerant mobile sync.

Compliance Matrix Engine

Rules-driven compliance evaluation engine assessing 1.4M entity checks nightly across jurisdiction-specific regulation sets, with full auditability.

Microsoft Graph Email Integration

Webhook-driven two-way email sync between a CRM and Microsoft 365 for 3,000+ mailboxes, replacing 15-minute polling with sub-5-second delivery.

AI Document Processing Pipeline

LLM-powered extraction pipeline turning ~40k unstructured property and legal documents per month into validated structured data with human review only on low confidence.

Technical Scope

Core competencies

AI Engineering

LLMs / Prompt Engineering / RAG / AI Agents / LangGraph / OpenAI Agents SDK / MCP / A2A / Tool Calling

Backend Engineering

Python / Go / Rust / PHP / Laravel / Node.js

API Engineering

REST / GraphQL / gRPC / Webhooks / API Versioning

Distributed Systems

Event-driven Architecture / Microservices / High Availability / Scalability / Message Queues / Idempotency

Cloud

AWS / Azure / GCP

Containers & IaC

Docker / Kubernetes / Terraform / GitHub Actions / CI/CD

Databases

PostgreSQL / MySQL / Redis / pgvector / Milvus / Qdrant

Observability

OpenTelemetry / Prometheus / Grafana / Structured Logging / SLOs

Infrastructure

Linux / Networking / Nginx / Debugging / Production Incident Response

Enterprise Engineering

OAuth2 / Authentication / Solution Architecture / Customer Discovery / Technical Documentation / Performance Optimization / Cost Optimization