// 03. CASE STUDIES & PORTFOLIO|10+ YEARS OF HANDS-ON EXPERIENCE (2012 - 2026)

Curated Projects & Delivered Architectures

A detailed track record of enterprise initiatives led by Konstantin Sh.: modernizing enterprise Data Warehouses in GCP/Snowflake, engineering autonomous AI agents, designing scalable data pipelines, and executing large-scale migrations.

10+

Years of Technical Experience (Since 2012)

600+

Retail Locations Integrated in Distributed Systems

GCP & Snowflake

Cloud Data Warehouse & Analytics Specialist

AI Agents

Autonomous Workflows & Production MLOps

[01] // 2025-PRESENT · MANUFACTURING, RETAIL & WHOLESALESenior Data & AI Agent Engineer

Greenfield Cloud Modernization to GCP (BigQuery), MLOps & Autonomous AI Agents

Scope: Mid-Market Enterprise (Manufacturing, Retail & Wholesale Distribution)

Led the comprehensive modernization of enterprise data architecture and analytics, migrating legacy pipelines to a scalable cloud-native platform featuring Machine Learning models and autonomous decision-making agents.

>Architected and executed greenfield migration to GCP (BigQuery), consolidating data across multi-channel retail and wholesale into an automated Data Warehouse serving as the Single Source of Truth.
>Developed predictive ML models on structured operational data and built the end-to-end MLOps pipeline (automated retraining, data drift validation, and latency monitoring).

>Engineered and deployed autonomous AI agents to automate complex multi-department operational and administrative workflows, drastically minimizing manual intervention.
>Implemented robust ETL workflow orchestration with Prefect and Kestra, modern agent frameworks (Pydantic AI / ADK), Python pipelines, and Docker container deployments.

// STACK:GCP / BigQueryETL / Prefect / KestraPython & SQLMLOpsAI AgentsPydantic AI / ADKDocker

[02] // 2025 · OMNICHANNEL RETAIL & LOYALTYLead Data Engineer

Loyalty Platform Migration: Siebel CRM → Mindbox (E-Commerce + 200+ Stores)

Scope: Retail Chain with E-Commerce and 200+ Physical Store Locations

Designed the enterprise loyalty data model and integration pipelines to decommission legacy Siebel CRM and achieve seamless migration to Mindbox across online and physical retail environments.

>Mapped customer reward accounts, tier structures, and promotional mechanics from Siebel into Mindbox entities with full identifier equivalence matrices.
>Authored architectural specifications and technical designs for all order lifecycles between SAP Hybris and Mindbox: pre-authorization, redemptions, cancellations, returns, and exception handling.

>Defined strict API contracts and payload schemas exchanged between SAP Hybris, Mindbox, Siebel, enterprise DWH, and the integration bus.
>Led integration test automation, regression suites, data consistency validation, and production Root Cause Analysis (RCA).

// STACK:SAP HybrisMindboxSiebel CRMAPI DesignData MigrationSQL

[03] // 2023-2025 · TRAVEL TECH & ENTERPRISE BOOKINGSSenior Software Engineer / Data Engineer

High-Concurrency Corporate B2B/B2E Booking & Ticketing Platform (Cloud & Hybrid)

Scope: Global High-Concurrency B2B/B2E Travel Technology Platform

Engineered core services and analytical pipelines for an enterprise platform aggregating global aviation providers (GDS/NDC), railway networks, and hotel chains with complete order lifecycle management and BI.

>Developed core microservices for order processing, corporate profile governance, and administrative backoffice with validation logic, expiration rules, and multi-tiered Redis caching.
>Implemented resilient integration adapters for GDS, NDC, rail operators, hotels, and payment gateways with automated retry logic and circuit breakers.

>Engineered event-driven sync/async workflows with idempotency guarantees and compensation logic for distributed transaction resilience.
>Constructed the analytical BI layer connecting operational schemas to Snowflake and MariaDB with explicit data contracts and end-to-end observability.

// STACK:System DesignAPI DesignSnowflakeMariaDBPythonRedisDocker

[04] // 2020-2023 · COMMERCIAL AVIATION & AIRLINE FINANCELead Data Engineer / BI Developer

Aviation Analytics Platform (BI) & Financial Aggregation for Airlines

Scope: Commercial Aviation Operations & Airline Financial Management

Developed analytical data products powered by mission-critical airline feeds (CRS, PSS, DCS, RMS), delivering embedded intelligence for clients and automated financial reconciliation.

>End-to-end dimensional modeling of aviation operational and revenue streams, connecting core operational systems to the cloud Data Warehouse and analytical datamarts.
>Authored comprehensive functional specifications, interface contracts (APIs, batch files), and UML architecture diagrams.

>Defined business KPI calculation logic and formal specifications for executive reports and operational dashboards in Looker BI.
>Investigated production data anomalies, refined mapping rules, and supported operational sign-offs with airline engineering teams.

// STACK:Google BigQueryLookerDimensional ModelingETL / ELTUMLFinancial Metrics

[05] // 2018-2021 · B2E ENTERPRISE COMMUNICATIONSLead Systems Analyst

Federated Inter-Regional B2E Communications Platform

Scope: Large-Scale Integrated Enterprise Communications System

Architected and specified a federated enterprise communications platform connecting multiple distributed services over a unified data backbone at inter-regional scale.

>Mapped and formalized technical system requirements, data entity modeling, and high-concurrency behavioral patterns.
>Designed integration patterns and distributed data flows for shared datasets utilizing ClickHouse and PostgreSQL.

>Collaborated closely with UX and product teams to translate business workflows into implementation-ready engineering specifications.
>Managed edge cases and quality assurance (QA) with comprehensive test scenario coverage.

// STACK:ClickHousePostgreSQLMongoDBSQLSystems AnalysisIntegrationsUML

[06] // 2018-2020 · AGRISCIENCE & GLOBAL RESEARCHData Engineer

Cloud Research Data Platform & IoT Sensor Telemetry for Crop Science

Scope: Global Agricultural R&D Center

Centralized IoT sensor telemetry from experimental field trials and laboratory assays into a cloud Data Warehouse, enabling scientific analytics and regulatory compliance.

>Automated continuous ingestion of sensor telemetry and lab test results from multiple global regions with automated data quality gates.
>Designed research domain data models, established data lineage, metadata dictionaries, and schema harmonization rules.

>Implemented immutable audit-ready archive storage (WORM standard) with strict access control governance for regulatory audits.
>Built batch and near-real-time ELT pipelines in GCP (BigQuery) serving computational research scientists.

// STACK:GCP / BigQueryIoT TelemetryETL/ELT PipelinesData ModelingRegulatory Compliance

[07] // 2015-2018 · ENTERPRISE ELECTRONICS RETAILSenior Systems Analyst

Retail Data Platform & POS Harmonization (600+ Stores & SAP)

Scope: Top-Tier Electronics Retail Chain

Engineered operational and analytical data layers for a nationwide retail chain with over 600 physical stores, harmonizing data streams with enterprise SAP.

>Formalized technical requirements for dynamic pricing, real-time inventory tracking, orders, and logistics between distribution centers and store branches.
>Integrated POS data feeds with SAP ERP, SAP BW, and SAP CRM, standardizing retail entities and Master Data Management (MDM) rules.

>Architected robust ETL/ELT pipelines with automated integrity checks and latency monitoring.
>Powered executive Business Intelligence reporting and strategic analytics for merchandising and supply chain teams.

// STACK:SAP ERP/BW/CRMMaster Data (MDM)Data EngineeringETLPOS Integration

[08] // 2012-2015 · ENTERPRISE ERP & DATA SYSTEMSDatabase & Systems Engineer / Tech Lead

Custom ERP Backend Architecture & Database Engineering for E-Commerce

Scope: E-Commerce Operations & Private Commercial Systems

End-to-end architecture of operational databases and backend business logic in PHP/Symfony and MySQL; led distributed engineering team and built custom ERP system from scratch.

>End-to-end technical architecture: normalized relational database schema, modular backend services, and high-performance indexing.
>Consultative discovery directly with business stakeholders, translating commercial requirements into executable software and data models.

>Mentored and coordinated distributed developers across time zones, ensuring clean code standards, schema migrations, and milestone delivery.
>Built core ERP modules spanning inventory control, procurement, transaction workflows, and financial accounting reporting.

// STACK:Relational Data ModelingMySQL OptimizationSymfonyERP ArchitectureTech LeadershipAPI Design

// DIRECT CONTRACT ENGAGEMENT

Looking for a Senior Solutions Architect for Your Project?

Direct senior-level advisory and hands-on execution with Konstantin Sh. No intermediaries, no account managers, with transparent time-tracking and itemized reports.

“Engagement exclusively via technical allocation and hourly contract ($/hr). Bi-weekly invoicing with detailed, transparent activity reports. No hidden scopes, no surprise costs.”

Initiate Architecture Discovery _>Chat on WhatsApp Email Directly: umreen@gmail.com