08/13/2026 updated
80 % partially available
Senior Full-Stack Developer - B2B SaaS
Izmir, Turkey
Only remote
Associate Degree in Information Systems, Pamukkale UniversityAbout me
Senior full-stack developer, 5+ years of B2B SaaS. Two products in production: a multi-tenant healthcare platform and an e-commerce platform running in 25 languages, built solo. TypeScript, NestJS, React, PostgreSQL, AI integrations.
SAP CloudApplication Programming Interfaces (APIs)Software as a ServiceDevOpsPostgreSQLNode.jsOpenStackRole-Based Access ControlNext.jsTypeScriptWorkflowsCloud Platform SystemReact.jsBackendB2b Software
Full-Stack Development with TypeScript
Expertise across the entire stack using TypeScript: NestJS and Node.js on the backend, React and Next.js on the frontend, with PostgreSQL as the database layer. Delivery of complete features end to end including schema, migrations, API, UI, and tests.
B2B SaaS Platform Architecture
Design and development of multi-tenant B2B SaaS products in production, including tenant isolation, role-based access control, transactional audit logging, realtime updates via SSE, and background job processing.
Database & Data Layer Engineering
Proficiency with PostgreSQL, Prisma, TypeORM, GraphQL, and Redis for building robust and scalable data layers in production environments.
AI & LLM Integration
Integration of OpenAI and Claude APIs, RAG pipelines, and LLM-powered features in production, including automated translation and content generation workflows.
Infrastructure & DevOps
Hands-on experience with Docker, AWS, Vercel, Cloudflare, Nginx, CI/CD pipelines, and Git for deploying and maintaining production applications.
Internationalization & Localization Systems
Building event-driven pipelines that automatically translate database content across 25 languages using Google Translate and OpenAI, including i18n and localization architecture.
E-Commerce Platform Development
Development of multi-channel B2B e-commerce platforms from scratch, covering product catalogs with variants and faceted search, company accounts with approval workflows, order management, and multi-warehouse inventory.
Web Scraping & Automation
Building web scraping tools and internal automation bots using Playwright for product data collection and business process automation.
Authentication & Authorization
Implementation of role-based access control and integration of identity management solutions such as Keycloak in production SaaS environments.
Expertise across the entire stack using TypeScript: NestJS and Node.js on the backend, React and Next.js on the frontend, with PostgreSQL as the database layer. Delivery of complete features end to end including schema, migrations, API, UI, and tests.
B2B SaaS Platform Architecture
Design and development of multi-tenant B2B SaaS products in production, including tenant isolation, role-based access control, transactional audit logging, realtime updates via SSE, and background job processing.
Database & Data Layer Engineering
Proficiency with PostgreSQL, Prisma, TypeORM, GraphQL, and Redis for building robust and scalable data layers in production environments.
AI & LLM Integration
Integration of OpenAI and Claude APIs, RAG pipelines, and LLM-powered features in production, including automated translation and content generation workflows.
Infrastructure & DevOps
Hands-on experience with Docker, AWS, Vercel, Cloudflare, Nginx, CI/CD pipelines, and Git for deploying and maintaining production applications.
Internationalization & Localization Systems
Building event-driven pipelines that automatically translate database content across 25 languages using Google Translate and OpenAI, including i18n and localization architecture.
E-Commerce Platform Development
Development of multi-channel B2B e-commerce platforms from scratch, covering product catalogs with variants and faceted search, company accounts with approval workflows, order management, and multi-warehouse inventory.
Web Scraping & Automation
Building web scraping tools and internal automation bots using Playwright for product data collection and business process automation.
Authentication & Authorization
Implementation of role-based access control and integration of identity management solutions such as Keycloak in production SaaS environments.
Experience
Professional experience5 - 10 years
Freelancer since2026
Languages
EnglishFluentTurkishNative speaker
Project history
Senior developer on a multi-tenant clinic-management SaaS in production covering appointment scheduling and analytics, patient records, treatment plans, payments and debt tracking, e-consent forms, surveys, and internal messaging. Responsible for tenant isolation, role-based access control, transactional audit logging, realtime updates (SSE), and background job processing. Ships full features end to end within a large existing codebase. Stack: NestJS, TypeScript, React, PostgreSQL, TypeORM, Redis, BullMQ, Nx monorepo.
Built the company's digital infrastructure from scratch as the sole developer. Designed and shipped a multi-channel B2B e-commerce platform with product catalog, faceted search, company accounts with approval workflow, order management, and multi-warehouse inventory. The platform runs in 25 languages via an event-driven translation pipeline using Google Translate and OpenAI. Also delivered the company website, web-scraping tools, and internal automation bots. Stack: NestJS (GraphQL), Next.js (3 apps), Prisma, PostgreSQL, Keycloak, MinIO, Docker.
Built custom business websites with React, Next.js, and Chakra UI under real client deadlines, including design implementation, CMS integration, and performance work.