Senior Technical Lead with 8+ years owning full delivery cycles across enterprise SaaS, AI-integrated products, and production DevOps
I'm Suman Dey (online: imsumandey), a Senior Technical Lead at ROITech Consulting with 8+ years of experience across enterprise software, SaaS, and AI-integrated products. I own the full delivery cycle: database schema design, backend API architecture, frontend, and production infrastructure. I make architectural decisions before writing a line of code, and I lead teams that ship.
I am also the founder and owner of Monster Techno — my personal tech brand, YouTube channel (@MonsterTechno), and GitHub organisation (MonsterTechnoGits). Apps published on Google Play under the Monster Techno publisher name — including Raktamitra Ramnagar (com.monstertechno.raktamitra) and YesCozy (com.monstertechno.yescozy) — are built and owned by me.
My current focus is integrating LLMs into real products. I've built RAG pipelines, vector search systems using pgvector with HNSW indexing, AI assistants with tool calling and persistent memory, and background job systems for AI-assisted data processing — using BullMQ and Redis. This is production work, not experiments.
On the DevOps side, I design and run CI/CD pipelines with self-hosted GitHub Actions runners on Linux VPS, atomic deployments with automatic rollback, post-deploy health checks, automated DB migrations as a pipeline stage, and Cloudflare Tunnel routing — across four active production projects.
I've led cross-functional teams of 8 developers, conducted over 1700 code reviews, and introduced PR standards and mentoring practices that raised code quality across the board. I also use AI coding tools like Claude Code and GitHub Copilot as part of my daily workflow — with a disciplined approach where I own the architecture and constraints, and the AI helps with implementation speed.
Career progression showcasing continuous growth and technical leadership in full-stack development
ROITech Consulting Private Limited
Leading technical direction for client engagements and owning the complete architecture of a multi-tenant SaaS platform. Built RAG pipelines, vector search with pgvector, AI assistant with tool calling, and background job systems using BullMQ. Designed and operate production CI/CD pipelines across four live projects with atomic deployments and automatic rollback.
ROITech Consulting Private Limited
Led a cross-functional team of 8 developers across concurrent projects. Improved PostgreSQL query performance by 65% through indexing and schema optimisation. Conducted 1700+ code reviews. Set up multi-environment GitHub Actions CI/CD pipelines with self-hosted runners and per-environment secrets.
ROITech Consulting Private Limited
Delivered full stack features across enterprise client projects. Worked on backend systems handling 7000+ concurrent requests. Reduced deployment time by 83% with Jenkins and GitHub Actions. Delivered three production Next.js applications with 95+ Lighthouse scores.
ROITech Consulting Private Limited
Built enterprise web applications using React and Node.js. Worked on SAP platform development and learned the SAPUI5 and Fiori ecosystem. Progressed into owning features end to end within the first year.
Proven track record of delivering high-impact solutions that drive business growth and technical excellence
Improved query performance by 65% on a live 1M+ record platform through indexing strategy, query analysis, and schema optimisation. Sub-80ms search using trigram indexing.
Architected high-performance backend systems supporting 7000+ concurrent requests using Node.js worker threads and Redis queuing — with capacity planning and load testing.
Designed and operate CI/CD pipelines with self-hosted GitHub Actions runners, atomic deployments with automatic rollback, DB migrations as a pipeline stage, and Cloudflare Tunnel HTTPS routing.
Delivered three production Next.js applications using SSR, SSG, and ISR achieving 95+ Google Lighthouse scores, with a reusable component library that reduced frontend development time by 35%.
Established a development pipeline where the backend generates the full API spec on every change and the frontend consumes auto-generated TypeScript types and TanStack Query hooks — no hand-written API types anywhere.
Led a cross-functional team of 8 developers with 1700+ code reviews. Introduced PR standards, review checklists, and mentoring practices that raised code quality and reduced regressions.
Built CI/CD pipelines using Jenkins and GitHub Actions that reduced deployment time by 83%, cutting a multi-hour manual release process to under 20 minutes.
Led migration of multiple SAPUI5 projects from SAP Web IDE to Business Application Studio, improving development efficiency by 40%.
Mastering modern technologies to build scalable, performant applications
Core technologies I use to build exceptional digital experiences
I'm always interested in challenging projects and opportunities to create impactful software solutions. Let's discuss how we can work together to bring your ideas to life.
