SSajidur Rahman Sajid

Software Engineer — Dhaka

Sajidur Rahman Sajid

I build high-throughput backend systems and production ML pipelines — engineered to be fast, reliable, and worth trusting.

View work Download CV

CGPA / 4.00

tests written

thesis dataset

5x

Dean's Award

zsh — portfolio
~/src

Terminal: pip install trust · 218 tests passed — 0 failed · Redis Streams -> seal -> verify · pipeline status: ACTIVE · ready for your hardest problems

PythonFastAPINode.jsExpressNestJSPostgreSQLSQLAlchemyRedis StreamsBullMQDockerRESTPyTorchCatBoostScikit-learnHugging FacePandasNumPyTransformersOpenCVSHAP / LIMEReactNext.jsTypeScriptTailwind CSSViteReduxFramer MotionMongoDBSQLiteSupabaseCloudflare R2QdrantNeo4jSolidityFoundryOpenZeppelinViemTurnkey KMSGitpytestCI / CDVercelLinuxNpm Workspaces

[ 02 ] — Selected Work

Systems that earn trust.

The flagship trio — an audited fintech pipeline, a deployed full-stack platform, and an AI legal-intelligence MVP.

All projects

[ 03 ] — Currently

At LedgerCross, I build systems meant to be audited.

Day-to-day, that means dependable async pipelines, privacy-preserving ledgers, and security posture you can point at an auditor.

InvoicePilot

Shipping an 11-stage AI invoice pipeline with Redis Streams async workers and a Solidity seal registry.

CaseVault GraphRAG

Designing the Phase-2 graph engine — Qdrant vector search plus a Neo4j knowledge graph with community detection.

SOC 2 readiness

Building the security policy suite, trust center, and row-level-security migrations ahead of audit.

Read the InvoicePilot case study

[ 04 ] — Research

Featured thesis

A hybrid ensemble trained on 2,237 student surveys detects cognitive impairment better than any single model.

Thesis · ML / Deep Learning

NeuroScreen

A hybrid CatBoost + ANN ensemble that detects cognitive impairment in insomniac university students — 95.20% accuracy, ROC-AUC 0.982.

Read the case study
95.20%
accuracy
94.40%
precision
96.10%
recall
95.24%
F1
0.982
ROC-AUC
2,237
survey responses

[ 05 ] — Experience

A path engineered, not walked.

From a 5.00 SSC to a shipped fintech pipeline — every step was deliberate.

May 2026 — Present

LedgerCross

Software Developer Trainee — InvoicePilot, Redis Streams, Solidity seals

NOW

Feb — Apr 2026

BSS Internship

Software Engineer Intern — shipped 18 responsive projects + 6 assigned tasks

2022 — 2026

5× Dean's Award

AIUB Merit Scholar (70% waiver) across the CSE program

Sep 2022 — Apr 2026

AIUB · BSc CSE

CGPA 3.92 / 4.00 — thesis: NeuroScreen hybrid ensemble (0.982 AUC)

[ 06 ] — Capabilities

Tools I reach for under pressure.

A backend-and-AI core, with the frontend and Web3 skills to ship end-to-end when it counts.

Backend

PythonFastAPINode.jsExpressNestJSPostgreSQLSQLAlchemyRedis StreamsBullMQDockerREST

AI / ML

PyTorchCatBoostScikit-learnHugging FacePandasNumPyTransformersOpenCVSHAP / LIME

Frontend

ReactNext.jsTypeScriptTailwind CSSViteReduxFramer Motion

Data & Databases

MongoDBSQLiteSupabaseCloudflare R2QdrantNeo4j

Web3

SolidityFoundryOpenZeppelinViemTurnkey KMS

Tooling & Practice

GitpytestCI / CDVercelLinuxNpm Workspaces

[ 07 ] — Let's talk

Let's build something trustworthy.

Backend pipelines, ML products, or an audit-ready system — I'm currently open to engineering work and collaborations.

Start a conversation sajidsajidurrahman99@gmail.com