Backend & APIs
Production REST APIs and services with clear boundaries, dependable error handling, and maintainable Python.
PythonDjangoDRFFastAPI
Available for new opportunities
Hi, I'm Mustahid.
I build the systems behind the product.
Python Backend Engineer with 3+ years of experience building reliable APIs, data pipelines, automation, and cloud applications. I focus on code that stays dependable when the data gets messy and the traffic gets real.
pipeline.healthy
uptime 99.9%
- Years experience
- 3+
- Featured systems
- 4
- Springer publication
- 1
- CSE GPA
- 3.76
Python Django FastAPI PostgreSQL Celery Redis Pandas Docker AWS Next.js React TypeScript Selenium
About me
Engineering for the messy middle.
I'm a backend engineer who turns requirements, imperfect data, and operational constraints into systems teams can trust. Most of my work lives in Python — Django, DRF, and FastAPI on top of PostgreSQL, with Celery and Redis for the work that shouldn't block a request.
I've built data pipelines, scrapers, document processors, network monitoring tools, and AI retrieval systems — and I ship the frontend on top with Next.js, React, and TypeScript.
- Own features end to end — requirements, design, testing, deployment, support
- Comfortable with unreliable inputs and the edge cases they create
- Experienced collaborating with remote, international teams
- Published researcher with a strong CS foundation
What I do
Services I deliver
Backend depth plus modern Next.js and TypeScript frontends, so a feature can go from idea to production with one engineer.
Frontend with Next.js
Fast, responsive web apps and dashboards built with Next.js, React, and type-safe TypeScript on top of my APIs.
Next.jsReactTypeScriptTailwind CSS
Data pipelines
Ingestion, parsing, validation, transformation, and reporting pipelines built for imperfect real-world data.
PostgreSQLPandasSQLETL
AI & LLM integration
Retrieval-augmented generation, embeddings, and semantic search wired into real products with grounded answers.
RAGEmbeddingsVector DBLLM APIs
Automation
Browser automation, scheduled jobs, and third-party integrations with strong logging and easy troubleshooting.
SeleniumCeleryCronWebhooks
Async & cloud
Restartable background jobs, caching, retryable workflows, monitoring, and containerised cloud delivery.
RedisDockerAWSCI/CD
Selected work
Systems built to do the work.
AI · Retrieval01
RAG System
Document-processing pipeline covering ingestion, preprocessing, metadata extraction, embeddings, semantic retrieval, and grounded LLM responses.
FastAPIPostgreSQLRedisVector DBReact
Data · Automation02
Competitors Ads Analysis AI
Pipelines that collect, validate, clean, classify, and analyse competitor advertising data with batch reporting and duplicate handling.
DjangoPandasSeleniumPostgreSQLTypeScript
Infrastructure · Observability03
Network Management System
Ping, DNS, SNMP, and Traceroute checks with resilient parsing, failure handling, storage, CSV reporting, and dashboard APIs.
PythonPostgreSQLAWSDockerReact
Files · Processing04
Document Processor
Django backend for PDF upload, validation, splitting, merging, and bulk processing with structured logs and production-ready error handling.
PythonDjangoPostgreSQLDockerAWS
Experience
Building, shipping, improving.
Production backend work across product companies in Bangladesh and Japan.
- Jun 2025 — PresentCurrent
Software Engineer
Ninja Digital Innovations · Dhaka, Bangladesh
Developing backend services, REST APIs, and data-processing workflows while owning delivery from requirements through testing, deployment, and support.
- Python, Django, DRF, FastAPI, PostgreSQL, Celery, Redis, and Pandas in production
- Structured and unstructured data ingestion, validation, transformation, and reporting
- React and TypeScript dashboards for search, filtering, and data visualisation
- Apr 2023 — May 2025
Software Engineer
Brandcloud, Inc. · Tokyo, Japan · Remote
Built backend applications, internal automation, and data-intensive workflows with an international engineering team.
- Python and Django applications, REST APIs, and third-party integrations
- Pandas pipelines for parsing, validation, transformation, and reporting
- Selenium automation with improved logging, reliability, and troubleshooting
Toolkit
The right tools, used with intent.
Backend
PythonDjangoDRFFastAPIREST APIs
Data
PandasETLCSV / JSONParsingValidation
Storage
PostgreSQLSQLRedisIndexingTransactions
Quality
PytestUnit testsIntegration testsClean code
Frontend
Next.jsReactTypeScriptTailwind CSSDashboards
Async & DevOps
CeleryBackground jobsDockerAWSCI/CDCloudflare
Education
B.Sc. in Computer Science & Engineering
Daffodil International University · 2018 — 2022
3.76 / 4.00
Publication
An LSTM-Based Word Prediction in Bengali
Springer · 2023
Research on sequence modelling for next-word prediction in Bengali using LSTM networks.
Contact
Have a hard backend problem? Let's talk.
Whether it's a full-time role, a freelance project, or just a question — send a message and I'll get back to you.
- Emailmustahidhasan9@gmail.com
- LinkedInConnect on LinkedIn
- LocationDhaka, Bangladesh · Remote friendly