14+ YEARS — ENTERPRISE SOFTWARE & DATA SYSTEMS
Fourteen years building the systems that keep enterprise transactions honest.
I lead full-stack delivery of financial reconciliation engines, OTA platforms and ERP systems on the .NET stack — and I'm extending that foundation into LLM-powered automation and modern data platforms: Airflow, Databricks, RAG and feature stores.
14+ Yrs Exp · Senior Full-Stack Engineer (.NET) · AI/LLM · Data Engineering · Azure/AWS
OTA · Fintech/DFS · Foodie · E-commerce · ERP (Garments, Rice, Textile, Denim, Spinning) · IoT
14+Years in production systems
25+Engineers & QA led
50K+Daily transactions reconciled
94%Anomaly-detection accuracy
5,000+B2B agents served
01 / ABOUT
From enterprise .NET to AI-assisted data platforms
Over 14 years I've led full-stack delivery for OTA booking platforms, fintech reconciliation engines, a food-delivery marketplace, and ERP systems spanning garments, rice, textile and spinning manufacturing — usually as the technical anchor coordinating engineering, QA and business stakeholders through teams of 25+, while also owning the SQL Server estate itself: performance tuning, replication, mirroring, log shipping and disaster-recovery configuration.
Since 2023 I've been extending that foundation into AI/LLM-assisted engineering and modern data platforms: shipping LLM-powered support chatbots and AI recommendation engines in production, and building out Medallion Lakehouse, orchestration (Airflow/Databricks) and RAG/feature-store skills through hands-on data engineering work with a remote consulting client.
What ties it together: systems that don't quietly lose money or data. Reconciliation, data quality and observability show up in nearly everything I've shipped.
02 / EXPERTISE
Where I operate
Backend & Architecture
C#.NET 6/8ASP.NET CoreASP.NET MVCWeb APIRESTful APIsEntity FrameworkDapperLINQMicroservicesClean ArchitectureCQRSMediator PatternDDDEvent-Driven ArchitectureGraphQLWebhooksSignalR
Frontend
Angular 13/16/18ReactTypeScriptJavaScriptHTML5/CSSBootstrapjQueryAjaxRazor ViewTelerik UI
Data Platforms & Orchestration
PythonETL / ELTApache AirflowDatabricksDelta LakeMedallion ArchitecturedbtDuckDBPySparkPandasPyArrowKafkaRabbitMQRedisHangfireSQL Agent JobsStreamlitFastAPIShell Scripting
AI / LLM Engineering
OpenAI / Claude AIGitHub CopilotRAG PipelinesLangChainFAISS / Vector StoresFeature Stores (Feast)MLflowPrompt Engineeringscikit-learnLightGBMAnomaly DetectionDemand ForecastingCredit ScoringAI Dynamic Pricing
Databases
MS SQL ServerAzure SQLAWS RDSPostgreSQLMongoDBOracle 19cMySQLMariaDBSnowflakeDuckDB
Database Administration & Reliability
Backup & RecoveryReplicationLog ShippingDatabase MirroringAlwaysOn HAClusteringDisaster RecoveryT-SQL / PL-SQLCTEsQuery StoreProfiler / Extended EventsWindow FunctionsPartitioningCapacity PlanningSSISSSRSSSASRoot Cause Analysis (RCA)
Cloud & DevOps
AzureMicrosoft FabricAzure Data FactorySynapse AnalyticsADLS Gen2AWSAWS S3AWS GlueEC2DockerTerraformGitGitLab CI/CDGitHub ActionsAzure DevOpsIIS
Data Quality & Governance
Great ExpectationsOpenLineageMarquezMicrosoft PresidioAzure PurviewRBACData ContractssqlglotText-to-SQL (NLQ)
Leadership & Delivery
Team Leadership (25+)Code Review & MentoringAgile / ScrumSprint PlanningRequirement GatheringRelease ManagementStakeholder CommsRAID Logs
Reporting, BI & Analytics
Power BITableauRDLCTelerik ReportsMixpanelGoogle Analytics
Domain & Industry Expertise
Fintech / DFSOTA / Travel TechE-commerceLoan ManagementERP (Garments, Rice, Textile, Denim, Spinning)HRMSPOSIoTGeneral LedgerAR / APBank ReconciliationTrial BalancePayment Gateways (bKash, Nagad, Rocket)
Collaboration & PM Tools
JiraConfluenceTrelloAsanaFigmaLucidchartMiro
03 / EXPERIENCE
Track record
Dec 2023 — Present
Senior Software Engineer / Tech Lead
Technonext Software Ltd (US-Bangla) · Dhaka
- Lead full-stack delivery of 6 OTA platforms (Booking, Ticketing, Price Engine, Fare Rules, AI-powered Search) on .NET Core Web API, Angular, Dapper and AWS RDS MSSQL.
- Administer the production AWS RDS MSSQL estate — Query Store, SQL Profiler and Execution Plan tuning, strategic indexing and Redis caching lifted database throughput 40%, eliminated deadlocks, and held search response under 2s for 10,000+ concurrent users.
- Tech-lead the OTA financial ecosystem for 5,000+ agents — automated bank reconciliation matching 10,000+ daily transactions in under 5 minutes at 94% anomaly-detection accuracy, zero revenue leakage across 50,000+ daily transactions.
- Shipped an LLM-powered support chatbot cutting response time from 2 hours to 2 minutes, with 70% of queries resolved without human intervention.
- Delivered the Foodie platform's AI recommendation engine (+23% AOV) and IoT delivery/temperature monitoring (-18% delivery failures).
Jan 2025 — Present
Concurrent
Senior Data Engineer (Freelance)
Freelance · Remote
- Designed and delivered scalable end-to-end ETL/ELT pipelines integrating SQL Server, PostgreSQL, REST APIs, and cloud storage using Airflow, ADF, and Databricks.
- Architected enterprise Lakehouse/DWH solutions (Medallion Architecture) with PySpark, SQL, and dbt — incremental loading, SCD Type-2, dimensional modeling, performance tuning.
- Built analytics-ready datasets and Power BI semantic models; implemented data quality, governance, lineage, and security (Great Expectations, OpenLineage, IAM, encryption).
- Automated infrastructure, deployments, and CI/CD orchestration via Terraform, Docker, Git, and Azure DevOps for scalable, reliable data platforms.
- Partnered with cross-functional stakeholders to design modern cloud data solutions across Fabric, Synapse, ADF, ADLS Gen2, and Databricks.
Jun 2023 — Present
Concurrent
Senior Full-Stack Engineer / Tech Lead (Remote)
Freelance · Japan Client
- Architected and tech-led a scalable e-commerce platform on .NET Core microservices with Clean Architecture, CQRS/Mediator, RabbitMQ and Azure SQL.
- Delivered multi-currency checkout, Japanese localization and automated cross-border reconciliation; React + TypeScript frontend with Redis caching (-50% page load).
- Pioneered a Claude AI-assisted delivery workflow — +40% coding velocity, -35% bug density, 98% client satisfaction.
Apr 2019 — Dec 2023
Senior Software Engineer / Tech Lead
Boishakhi Group · Dhaka
- Tech-led parallel delivery of three enterprise products — Garments ERP, Rice ERP and Manpower Management — driving a 30% operational-efficiency uplift across Group units.
- Demand forecasting cut overproduction waste 27% and improved inventory turnover 34%; workflow automation cut manual visa-processing by 60%.
- Owned SQL Server administration for the estate — job scheduling, query and indexing optimization cut report-generation time 50% across systems.
- Integrated Power BI and RDLC for real-time, plant-wise and buyer-wise profitability dashboards.
Feb 2017 — Apr 2019
Senior Software Engineer / Team Lead
Amber Software Solutions Ltd. (PARTEX GROUP)
- Led full-stack delivery of Denim ERP (15+ modules) and Spinning ERP covering the full textile manufacturing value chain.
- Cut stock-out incidents 35% and unplanned downtime 35% via production planning, quality control and preventive-maintenance tracking.
- Administered the SQL Server platform underneath — stored procedures, triggers, normalized schemas and data-integrity constraints across 15+ ERP modules.
- Secured HRMS for 5,000+ users with role-based access control.
Apr 2014 — Feb 2017
Software Engineer
Rahimafrooz
- Built a rule-based credit-assessment engine over customer demographics and payment history — cut default rate 28% and loan-processing time from 3 days to 4 hours.
- Delivered automated repayment reminders and a full financial reconciliation module (AR/AP, balance sheet, trial balance).
Jan 2012 — Apr 2014
Programmer
Unisoft Systems Ltd.
- Developed HRM and multi-kitchen POS systems with real-time kitchen communication, cutting order-preparation errors 25%.
- Automated HR payroll, leave and attendance — cutting monthly processing time by 15 hours.
- Designed and normalized SQL Server schemas for scalability — early groundwork for a database-administration specialization alongside application development.
04 / FEATURED PROJECTS
Selected work, by the numbers
Enterprise engineering is rarely open-source — these are real production systems I've built and led, summarized by the business problem solved and the outcome delivered.
✈️
Sub-2-Second OTA Search & Zero-Leakage Reconciliation
Six OTA platforms had to stay fast under peak load while 5,000+ partner agents needed error-free, near-real-time financial reconciliation.
.NET Core Web APIAngularDapperAWS RDS (MSSQL)RedisQuery Store
- Held AI-powered search response under 2s for 10,000+ concurrent users after Query Store/Profiler tuning and indexing; Redis caching lifted throughput 40%
- Automated bank reconciliation for 5,000+ agents, matching 10,000+ daily transactions in under 5 minutes at 94% anomaly-detection accuracy
- Sustained zero revenue leakage across 50,000+ daily transactions
Enterprise/closed-source — case study on request
🤖
AI Chatbot & Smart Recommendations, in Production
Support response times were too slow, and a food-delivery platform was leaving order value and delivery reliability on the table.
LLM IntegrationConversational AIRecommendation EngineIoT Sensors
- LLM-powered chatbot cut support response time from 2 hours to 2 minutes, 70% of queries resolved without human intervention
- AI recommendation engine lifted average order value (AOV) 23% on the Foodie platform
- IoT-based delivery/temperature monitoring cut delivery failures 18%
Enterprise/closed-source — case study on request
🗄️
Retiring Legacy SSIS: An Enterprise Data Lakehouse
Legacy SSIS batch pipelines were expensive to maintain and gave no data-quality guarantees or lineage visibility.
DatabricksDelta LakeUnity CatalogPySparkdbt CloudAirflowGreat Expectations
- Databricks Medallion Lakehouse (Auto Loader, Unity Catalog) replaced legacy SSIS pipelines, cutting maintenance overhead 60%
- Built 50+ dbt Cloud models (SCD Type-2, incremental) with a 99.2% Great Expectations quality-gate pass rate and full OpenLineage/Marquez lineage
- Deployed 25+ Airflow DAGs on AWS EC2 orchestrating batch ingestion, dbt runs and quality checks with SLA monitoring and backfill
Enterprise/closed-source — case study on request
🏭
ERP at Scale: Textile, Agribusiness & Workforce
Two manufacturing groups ran textile production, agribusiness and workforce management on manual, disconnected processes with no real-time visibility.
ERP ArchitecturePower BIRDLCRBACDemand ForecastingHRMS
- Denim & Spinning ERP (15+ modules) cut stock-out incidents and unplanned downtime 35% each via production planning, QC and preventive-maintenance tracking
- Demand forecasting across Garments/Rice ERP cut overproduction waste 27% and lifted inventory turnover 34%, with a 30% overall operational-efficiency uplift
- Workflow automation cut manual visa-processing time 60%; secured HRMS for 5,000+ users with RBAC
Enterprise/closed-source — case study on request
💳
Credit Scoring: From 3 Days to 4 Hours
Manual credit checks made loan approval slow and left default rates hard to control.
Rule-Based Scoring EngineCredit Risk ModelingFinancial ReconciliationAutomated Reminders
- Rule-based credit-assessment engine over customer demographics and payment history cut default rate 28%
- Cut loan-processing time from 3 days to 4 hours
- Delivered automated repayment reminders plus a full financial reconciliation module (AR/AP, balance sheet, trial balance)
Enterprise/closed-source — case study on request
🌏
Cross-Border Commerce, Built for Japan
A Japan-market e-commerce launch needed multi-currency checkout and Japanese localization without sacrificing speed or delivery velocity.
.NET Core MicroservicesCQRS/MediatorRabbitMQAzure SQLReact + TypeScriptClaude AI-Assisted Delivery
- Shipped multi-currency checkout, Japanese localization and automated cross-border reconciliation on a .NET Core microservices architecture
- Redis caching cut page load time 50%
- Claude AI-assisted delivery workflow lifted team velocity 40%, cut bug density 35%, and hit 98% client satisfaction
Enterprise/closed-source — case study on request
05 / AI & DATA ENGINEERING
Building in the open
Alongside full-time Tech Lead work, I'm hands-on with modern data-platform and AI tooling — some through live freelance client work, and some as deliberate personal builds I'm constructing to deepen the stack. Honest status, not a fake project list:
Real-Time Airline Reconciliation Intelligence Platform
Building
Medallion Lakehouse (Bronze/Silver/Gold) ingesting Kafka airline streams into Parquet/Delta Lake with a dbt-DuckDB layer, data contracts and schema tests; a Python reconciliation engine matches GDS/airline records against booking ledgers with ML-assisted anomaly detection, and an LLM auto-generates discrepancy narratives for finance teams.
Python · dbt-DuckDB · Kafka · Delta Lake · Parquet · OpenAI LLM · Streamlit · Docker
Personal build — in progress, not yet public
ERP Medallion Lakehouse Migration Pattern
Planned
A data-contract-driven Bronze/Silver/Gold migration pattern for SAP/Dynamics 365-style ERP data — Purview catalog and PII classification, Great Expectations quality gating with quarantine tables, and OpenLineage/Marquez column-level lineage across Procurement, Finance, Inventory and HR.
Python · dbt-core · DuckDB · Parquet · Azure Purview · Great Expectations · OpenLineage/Marquez
Personal build — scoped, not started
RAG Platform over ERP & Financial Documents
Planned
Retrieval-augmented Q&A over financial and ERP documents — metadata-filtered, domain-aware retrieval (finance, procurement, HR) with RAGAS-tracked faithfulness, accuracy, latency and token cost, plus chain tracing and prompt-version regression detection.
LangChain · OpenAI · FAISS · MLflow · LangSmith · FastAPI · Streamlit
Personal build — scoped, not started
06 / GITHUB ACTIVITY
Open-source footprint
Most of my production work lives in private enterprise repos — this is the public activity trail.
Widgets not loading? View the profile directly at github.com/mokhlesur-rahman.
07 / IMPACT
Numbers that mattered
ZeroRevenue leakage across 50,000+ daily OTA transactions, with automated reconciliation of 10,000+ transactions/day at 94% anomaly-detection accuracy.
98%Client satisfaction on a Japan-based e-commerce build, with Claude AI-assisted delivery lifting velocity 40% and cutting bug density 35%.
-28%Default rate reduction via a rule-based credit-assessment engine; loan processing cut from 3 days to 4 hours.
30%Operational-efficiency uplift across Garments ERP, Rice ERP and Manpower Management at Boishakhi Group.
-35%Reduction in both stock-outs and unplanned downtime across Denim & Spinning ERP (15+ modules) at Partex Group.
99.2%Great Expectations quality-gate pass rate across 50+ dbt models on a Databricks Medallion Lakehouse.
40%Database throughput uplift via Query Store/Profiler tuning, strategic indexing and Redis caching — search held under 2s for 10,000+ concurrent users.
08 / CREDENTIALS
Certifications & education
2025
Microsoft Certified: Azure Database Administrator Associate (DP-300)
Microsoft
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B.Sc. in Information and Communication Engineering
Islamic University, Kushtia, Bangladesh
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Languages
English (professional fluency — business & technical documentation, executive presentations) · Bengali (native)
