name : Abdullah Al Masud Tushar
role : Senior Software Engineer — Backend-Heavy Full-Stack & Data Engineering
location : Dhaka, Bangladesh 🇧🇩
experience : 7+ years remote collaboration with European business across green energy, recruitment & transportation
focus : Backend Architecture · Distributed Systems · Cloud Infrastructure · Data Engineering-
📉 Reduced cloud infrastructure costs by 75% through API optimisation, query tuning & caching
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🌳 Owned org-unit management, solving complex hierarchical data operation with MPTT — reducing query complexity O(N) → O(1)
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🔒 Secured exposed customer data in S3 buckets with proper ACL configuration & dynamic URL dispatcher, closing a critical vulnerability with minimal UX disruption
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🔄 Implemented & maintained 20+ Airflow DAGs orchestrating end-to-end data pipelines — scheduling, retries & dependency management across multiple data sources
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📈 Built Python pipelines to ingest, transform & publish 500+ time-series curves for internal teams & external customers
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🧠 Anthropic CCAR-F Certified — Score 770/1000 — architecting, building & reasoning about production-grade agentic systems with Claude: agentic loops, multi-agent orchestration, tool/MCP design, prompt engineering & context management
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☁️ AWS Certified — 15+ AWS services in production across multiple enterprise platforms
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👨🏫 Mentored 20+ junior engineers on backend systems, cloud & distributed design and 100+ university students in algorithms and data structures over multiple years
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🏆 Competitive programmer — HackerRank 2237 · CodeChef 2001 · Codeforces 1554
| Platform | Company | Scale | Domain |
|---|---|---|---|
| Volue Insight | Cefalo | $550M platform | Green energy market data & forecasting |
| Recruitment Platform | Cefalo | Early-stage startup | Full-stack job matching & applicant tracking |
| Trivia Backend | Brainstation 23 | 50M+ requests/day | High-traffic consumer engagement (Robi Telecom) |
| Ferdia ERP | Brainstation 23 | $2.33M funded startup | Coach & charter bus operations digitization |
🐍 break-the-ice-with-python — 100+ Python problems with detailed solutions. 3,100+ ⭐ · 1,500+ forks — helping thousands of developers learn Python fundamentals.
🤖 rag-app / Marginalia — Chat with your documents. Upload PDFs or markdown, get streamed answers with inline citations pinned to the source passage. Built with Next.js, Gemini embeddings & SQLite vector store.
Professional network & work experience |
For direct communication & project inquiries |
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