Senior Full-Stack Engineer
I build production web applications with React and Java Spring Boot, IFS Cloud ERP solutions as a certified IFS developer, and increasingly AI-powered systems with Python and RAG pipelines, from banking platforms at scale to side projects in 3D and game dev.
StatusOpen to remote roles and freelance work, worldwide
01 · About
Senior Full-Stack Engineer with 6 years of production experience building React and Java Spring Boot applications across banking, ERP, and insurance domains, a certified IFS Cloud developer, and now building AI-powered document intelligence with Python and RAG pipelines.
I've led frontend architecture for a live banking platform, spent three years at IFS R&D building ERP modules used by 1,000,000+ users at 300 transactions per second, and hold IFS Certified Practitioner credentials in IFS Cloud web and business logic development and technical consulting. I also architected a FastAPI-based RAG add-on for AI-powered document search and summarization, and take on freelance work through Upwork and Fiverr alongside the case studies below.
STAT_01
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Years Experience
STAT_02
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Users Served
STAT_03
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Transactions / sec
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SLA Compliance
// Also explored
02 · Experience
Client: Commercial Bank of Ceylon · ~5,500 users · 250 TPS
Led the React.js frontend for the bank's enterprise document management platform, applied WCAG accessibility standards throughout, cut production bugs 20% with Jest and Cypress coverage, and architected a FastAPI-based RAG add-on for AI-powered document search, Q&A, and summarization.
Clients: North America (remote) · ~1,000,000 users · 300 TPS
Built React and Spring Boot ERP modules serving 1,000,000+ users at 300 transactions per second, maintained 95% SLA compliance, and code-reviewed across a 50-engineer team. Earned IFS Certified Practitioner credentials in IFS Cloud web development and technical consulting.
~3,500 users · insurance claims workflows
Built responsive React.js frontends integrated with Node.js and Java backends across insurance claims and management workflows.
// Certifications
// Education
Curtin University, Australia
Sep 2016 to 2019
03 · Selected Work
PRJ_01 // backend
Enterprise ERP modules for North American clients, at million-user scale.
Role
Software Engineer at IFS R&D International: full-stack and backend development, code review
PRJ_02 // frontend
A Formula 1 tracker covering every season since 1950, with no backend of its own.
Role
Solo build: data layer and caching, race analysis, charts, PWA, testing and deployment
PRJ_03 // desktop
A tiny 8-bit you that lives on your desktop: walks, naps, dances, and sulks when ignored.
Role
Solo build: pet behaviour, on-device photo pipeline, Rust backend, cross-platform release
PRJ_04 // backend
A quiz platform for O-Level ICT students, and the teacher who runs the room.
Role
Full-stack: backend architecture, auth, and the React frontend
PRJ_05 // design
A marketing site for a landscaping business, content-driven and CMS-free.
Role
Full build: design system, content architecture, deployment
PRJ_06 // 3d
An idle greenhouse game: grow, sell, expand, repeat.
Role
Solo build: game design, 3D scene, state architecture
PRJ_07 // frontend
A field-catalogue for plant species: fast search, zero backend.
Role
Solo build: data model, UI, search & filter
PRJ_08 // backend
A RAG pipeline that turns a document archive into an AI-queryable knowledge base.
Role
Backend & AI architecture: ingestion pipeline, retrieval, and response guardrails
04 · Contact
Open to remote full-time roles and freelance engagements with employers and clients worldwide.
01 // Email
dananjayapolwattage@
02 // GitHub
github.com/Dananjaya94
03 // LinkedIn
linkedin.com/in/dananjaya94
04 // Upwork
Work with me
05 // Fiverr
Book a gig
06 // CV
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© 2026 Dananjaya Polwattage
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