Nayeemur Rahman
Founding Engineer—Building software that moves business — startup to enterprise.
Sole engineer on a multi-tenant B2B SaaS platform used by ImmoScout24, Mileway, and Formwerk. Specialize in Next.js, TypeScript, Unreal Engine, and real-time systems. Open to Senior, Staff, and Founding Engineer roles.
- ImmoScout24
- Mileway
- Formwerk
Featured project
Flat-Finder
Multi-tenant 3D B2B SaaS·QOOP GmbH
3D project explorer for German real estate. Multi-tenant Next.js platform with live 3D viewers, used by ImmoScout24, Mileway, and Formwerk.
- Next.js
- Unreal Engine
- TypeScript
- Multi-tenant
Selected projects
Work shipped in production — from multi-tenant SaaS to native macOS.
Banikh
Multi-tenant e-commerce SaaS for Bangladesh
Shopify-for-Bangladesh SaaS with 5 payment gateways, 3 couriers, SEO audits, RFM segmentation, A/B testing, and SMS cart recovery.
- Next.js
- Hono
- Multi-tenant SaaS
- Payments
Rebutly
AI-scored debate platform
Structured LLM output pipeline with Zod validation and schema-first prompts.
- Next.js
- LLM
- Zod
GreenCalc
Solar ROI calculator
Pulls NASA POWER, Open-Meteo, and NREL PVWatts data into a free solar payback estimator.
- Climate
- Next.js
- Open APIs
Mac Cleaner
Native macOS cleanup utility
Open-source native Swift app for cleaning system caches and stale files.
- Swift
- macOS
- Open Source
Experience
7+ years of full-time and contract engineering — independent to founding.
- Feb 2023 — Present
Founding Engineer
QOOP GmbH·Remote (CET overlap)
- Sole engineer on a multi-tenant B2B SaaS platform for the German real estate market.
- Built and operate Flat-Finder, a multi-tenant 3D project explorer for German real estate; dozens of customer projects live in production.
- Designed and shipped a pixel-streamed Unreal Engine pipeline; ran in production for over a year, sunset after cost and UX evaluation.
- Shipped an Unreal Engine SDK enabling non-engineers to author interactive 3D scenes.
- Designed a CMS to manage every aspect of Flat-Finder — content, project data, analytics, and lead lists.
- Delivered marketplace integrations and co-branded portals with ImmoScout24 and Mileway.
- Architected role-based access control across three tenant tiers.
- Dec 2018 — Feb 2023
Full-Stack Engineer
Independent / Upwork + Fiverr·Remote
- Top-rated full-stack contractor delivering SaaS MVPs, e-commerce platforms, and custom integrations.
- Stack: Next.js, React, Node.js, TypeScript, mobile.
- 5-star average across enterprise and startup engagements.
Skills
Tools and practices I reach for on production work.
Languages
- TypeScript
- JavaScript
- Rust
- Elixir
- Swift
- SQL
- C++
Frameworks
- Next.js
- React
- Node.js
- Phoenix
- Unreal Engine
Infrastructure
- Cloudflare
- Hetzner
- Coolify
- Docker
- PostgreSQL
- Redis
Practices
- Multi-tenant SaaS
- Real-time systems
- RBAC
- Observability
- CI/CD
Let's build something great.
Open to Senior, Staff, and Founding Engineer roles. Reply within 24 hours, CET timezone.