Sithum.

RÉSUMÉ

Sithum Imarsha

Senior Software Engineer — Full-Stack & AI Engineer

Colombo, Sri Lanka+94 77 2107 436sithum.imarshadev@gmail.comsithumimarsha.com
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SUMMARY

Dynamic Senior Full-Stack Engineer with 6+ years of experience building scalable web applications and SaaS products. Expert in Next.js, NestJS, and TypeScript, with a specialized focus on AI implementation and high-performance web animations. Proven track record of leading development teams, launching independent SaaS ventures, and architecting complex, high-traffic systems for both startups and enterprises.

TECHNICAL SKILLS

AI & SYSTEMS

LLM IntegrationLangChainRAGVector DBsPrompt Engineering

FRONTEND

Next.jsReactTypeScriptGSAPFramer MotionTailwind CSSShadcn UI

BACKEND & DATA

NestJSNode.jsStripeAuth.jsREST / GraphQLPostgreSQLDrizzle / PrismaRedisZustandTanStack QueryRedux

CLOUD & DEVOPS

AWS (S3, Lambda)DigitalOceanDockerCI/CDVercelFirebase
EXPERIENCE

Azbow (Pvt) Ltd

Jan 2024 – Present

Senior Software Engineer

  • ◆Lead development of international B2B/B2C projects (Germany/EU), architecting scalable REST APIs and full-stack interfaces using Next.js App Router, TypeScript, NestJS, and Tailwind CSS.
  • ◆Boosted engineering velocity via CI/CD pipelines and Agile adoption, while mentoring junior developers and establishing systematic code-review and documentation practices.
  • ◆Spearheaded AI feature delivery — RAG pipelines, LangChain integrations, and vector-search workflows — reducing manual workload for end-users by 40%.

Azbow (Pvt) Ltd

May 2019 – Jan 2024

Full-Stack Developer

  • ◆Built and maintained high-traffic web applications and SaaS platforms across the full stack (React, Node.js, NestJS, PostgreSQL) for clients in e-commerce, logistics, and professional services.
  • ◆Delivered performance-optimised frontends achieving consistent 90+ Lighthouse scores across Core Web Vitals for production deployments.
  • ◆Introduced TypeScript across multiple legacy JavaScript codebases, reducing runtime errors by over 60% within 3 months.
KEY PROJECTS

Finance Flow

financeflow.codexive.lk

SaaS · Founder & Lead Developer

Automated finance platform for freelancers, agencies, and SMBs. Features Polar-based subscription billing and Fia — a RAG-powered AI assistant with expense scanner and LangChain real-time financial insights.

Next.jsPrismaPGVectorPolarLangChainOpenAI APIGSAPShadcn UI

Code Class

www.codeclass.co.nz

Freelance Developer

1:1 online education platform for New Zealand learners. Achieved 100% SEO and 99% Performance Lighthouse scores in production.

Next.jsTailwind CSSFramer Motion
EDUCATION

B.Sc (Hons) Software Engineering

ICBT Campus

2021

HND Computer Software Engineering

ICBT Campus

2018