Md. Tanjir

Senior Frontend Engineer at Omnistra (Private) Limited

Delivered React/Next.js and TypeScript features for an AI-focused web experience, including interactive dashboards, client-portal flows, and data-driven calculators. Built reusable components and improved responsiveness, rendering performance, and maintainability across complex codebases.

Senior Full-Stack Developer (Contract) at Scalebridger

Built end-to-end SaaS features with Next.js/TypeScript and NestJS, including secure authentication, CRM workflows, and automation. Designed reusable UI patterns and reliable API contracts while working with relational data and a performance-focused frontend/server architecture.

Senior Full-Stack Developer (Contract) at Scalebridger, Austin, TX, USA

Built end-to-end SaaS features with Next.js/TypeScript and NestJS, including secure authentication, CRM workflows, and automation. Designed reusable UI patterns and reliable API contracts while working with relational data and ensuring frontend/server performance-focused architecture.

Full-Stack Developer (Contract) at Wal Valencia

Delivered frontend and backend changes for a conversational automation supporting WhatsApp and Messenger workflows. Extended APIs, webhooks, third-party integrations, and automated error handling to improve reliability and production performance.

Full-Stack Developer (Contract) at WIsland Valencia, Spain

Delivered frontend and backend changes for a conversational AI assistant supporting WhatsApp and Messenger workflows. Extended APIs, built webhooks and third-party integrations, and improved error handling, reliability, and production performance.

Senior Software Engineer at Xperts

Led React/Next.js frontend architecture and built backend services using NestJS and PostgreSQL. Implemented RBAC and other access-control patterns for production systems.

Senior Full-Stack Engineer (Contract) at Get + B

Built a browser-based interactive iCanvas editor with manipulation and die-cut/vector/SVG workflows. Solved complexity and synchronization problems so that transformed editor elements remained consistent during scaling, rotation, flipping, and other interactive edits.

Senior Full-Stack Engineer (Contract) at Get B + B Sweden

Built a browser-based image/video manipulation and editor experience featuring interactive canvas editing, die-cut effects, and vector/SVG workflows. Solved collaboration/consistency and synchronization issues so the final output matches what users create during scaling, rotation, cutting, and other edits.

Senior Frontend Engineer at Sbd (Bangladesh)

Built enterprise dashboards and analytics interfaces using React, TypeScript, and React Query. Integrated FastAPI backend services and structured query/caching patterns for data-heavy screens.

Senior Frontend Engineer at S?d Bangladesh

Built enterprise dashboards and analytics interfaces with React, TypeScript, and React Query/TanStack Query. Integrated FastAPI backend services and applied query/caching patterns for data-heavy screens.

Freelance Full-Stack Developer at Upwork

Delivered 100+ production projects across React/Next.js, FastAPI, Node.js/NestJS, Laravel, Shopify, and WordPress. Built API integrations, custom solutions, and deployments supporting production requirements across varied client domains.