[ 03 ] — About
Engineer, thesis author, and reluctant trust-builder.
I work where backend reliability meets machine-learning rigor — and I care that the numbers you see are real.
I'm Sajidur Rahman Sajid, a Software Engineer in Dhaka currently building InvoicePilot at LedgerCross — an 11-stage AI invoice pipeline whose processing history is anchored on-chain. Before that I interned as a Software Engineer at BSS, where I shipped 18 responsive projects and worked through Bootstrap, JavaScript, and Figma-driven frontend work.
My thesis, NeuroScreen, trained a hybrid CatBoost + ANN ensemble on 2,237 student surveys to detect cognitive impairment — 95.20% accuracy and a 0.982 ROC-AUC, beating both standalone models. It taught me that the best ML systems combine complementary strengths, and that real datasets beat toy ones.
Across AIUB I earned the Dean's Award five times and an AIUB Merit Scholarship (70% tuition waiver). I've coordinated the Space Innovation Camp and represented WRO Bangladesh. Underlying all of it: an earned Duke of Edinburgh's Bronze Award — evidence that I finish what I start.
[ 02 ] — Values
How I work
Honesty over hype
Every project lists its real numbers — and its real limitations. Blending beats a single model 95.20% of the time; I also tell you where it can't.
Systems thinking
From Redis Streams consumer groups to RLS tenant isolation, I design for the whole pipeline — not just the happy path.
Ship, then polish
A working MVP with honest boundaries beats a perfect spec. CaseVault's Phase 1 shipped before Phase 2 was even started.
Engineering receipts
218 passing tests, 16 reference papers, 2,237 survey responses — I keep the evidence that a claim is true.
[ 03 ] — Timeline
Career & education
Software Developer Trainee
LedgerCross · Dhaka, Bangladesh · May 2026 — Present
- Shipping InvoicePilot — an 11-stage AI invoice pipeline with Redis Streams async workers and a Solidity seal registry (218 passing pytest cases).
- Designing CaseVault's GraphRAG phase: Qdrant vector search + Neo4j knowledge graph with community detection.
- Driving the SOC 2 readiness suite: security policies, trust center, and row-level-security migrations.
Software Engineer Intern
Bangladesh Software Solution (BSS) · Feb 2026 — Apr 2026
- Built 18 responsive projects across an HTML/CSS learning track, then advanced into Bootstrap, JavaScript, and Figma-driven frontend work.
- Shipped 6 assigned tasks including a bento grid gallery, an analog clock, a furniture storefront, and a Doc House Figma build.
BSc in Computer Science & Engineering
American International University-Bangladesh (AIUB) · Dhaka, Bangladesh · Sep 2022 — Apr 2026
- CGPA 3.92 / 4.00
- Thesis: NeuroScreen hybrid ensemble (95.20% accuracy, 0.982 ROC-AUC)
- 5× Dean's Award + AIUB Merit Scholar (70% tuition waiver)
Higher Secondary Certificate (HSC)
BAF Shaheen College · 2019 — 2021
- GPA 5.00 / 5.00 · Science
Secondary School Certificate (SSC)
Kurmitola High School · 2017 — 2019
- GPA 5.00 / 5.00 · Science
Student Activity Coordinator
Space Innovation Camp · 2022 — 2025
- Coordinated student activities and camps across three years.
Public Relations Representative
WRO Bangladesh · 2023 — 2024
- Represented the national robotics competition organizer publicly.
Duke of Edinburgh's Award
Bronze · 2026
- Achieved Bronze level of the international award program.