Mathematics · APIs · relational data
Berlin · open to relevant roles
Résumé2026
Bishwajit Karmaker
Junior Data Engineer / Backend Developer · Mathematics · Python · PostgreSQL · REST APIs
Deployments · logs · configuration
Multi-tenant SaaS in active development
Profile
Junior software and data professional with a Bachelor of Science in Mathematics and hands-on experience with Python, Django REST Framework, PostgreSQL, relational data modelling, REST APIs and production deployments. Experienced in designing structured backend domains, validating transactional data, debugging through logs and API responses, and maintaining database-backed applications. Seeking to develop further in data engineering, ETL, database systems and scalable data processing.
Technical Skills
Python · TypeScript · JavaScript
HTML · CSS
PostgreSQL · SQL fundamentals
relational data modelling · Django migrations · data validation
Django · Django REST Framework
REST API design · serializers · authentication/authorization · JWT
Git · GitHub · GitLab · Linux
Railway · Vercel · VS Code · environment configuration · log-based debugging
Selected Software Projects
OPSHUB — Multi-tenant Operations, Finance & POS SaaS
2025–Present · active V1 development- Designing a multi-tenant business platform with organization- and branch-scoped data models across POS, inventory and finance workflows.
- Implementing permission-controlled backend workflows, validation and transactional business logic with emphasis on data integrity and auditability.
- Working extensively with relational models, migrations, API contracts and structured production-style debugging.
Linda Art Gallery — Client Project
2025–2026 · Django · PostgreSQL · Next.js · Railway- Developed and deployed a production gallery platform for a real client, including media management, validated contact workflows and email integration.
- Maintained the deployed application and diagnosed production issues using logs, API responses and configuration analysis.
Portfolio Web Application
2025–Present · Django · PostgreSQL · Next.js · JWT- Built a full-stack application with CRUD APIs, relational data models, validation, JWT authentication and protected frontend areas.
Professional Experience
Sport Voswinkel GmbH (INTERSPORT), Berlin · Store Associate
2024–Present- Work with SAP-supported merchandise and operational processes in a high-volume retail environment.
- Execute structured workflows and documentation accurately under time pressure while coordinating with colleagues and customers.
Education
BRAC University, Dhaka
Bachelor of Science in Mathematics
Full-Stack Web Development Bootcamp (in-class)
HTML · CSS · JavaScript · Ruby · Ruby on Rails
Languages
EnglishFluent
GermanProfessional communication
BengaliNative