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Proven at National and Global Scale | Build Backend Systems delivering $140M+ annually across 100M+ users | 10+ projects delivered | Comfortable working in EST, PST, and CET Struggling with backend bottlenecks or scaling limits? I build high-performance Golang & Python systems that handle high concurrency, ensuring 99.9% uptime and preventing crashes, even with a million active users online. I specialize in Golang & Python development, crafting robust APIs, event-driven architectures, and data-intensive systems that power real-world products, from eCommerce platforms to fintech applications, AI/ML-powered solutions, and real-time data pipelines. DRIVING REVENUE GROWTH AT SCALE. 1. National highway system (OneNetwork): - 100M+ vehicles and PKR 40 billion+ (~$140M USD) in annual transaction volume across multiple tollbooths - Local bank integrations for online payment processing and a centralized ledger for reconciling cash payments and online transactions. 2. Dotshop.ai (eCommerce platform) - 100,000+ concurrent users, 15k+ reqs/second - Up to $50,000/month in processed sales, with automated curator/platform revenue splits. If you’re looking for a backend engineer who can own your project end-to-end, from architecture design to production deployment, I can be your one-stop solution. WHAT I DELIVER → APIs & backend systems handling 1M+ concurrent users with zero latency spikes or downtime (Go, Python, gRPC, WebSockets) → Event-driven microservices processing millions of real-time events daily with zero data loss. → Database architecture tuned for sub-millisecond query response at billion-row scale (PostgreSQL, MongoDB, TimescaleDB) → Payment & revenue infrastructure handling automated splits, payouts, reconciliation using Stripe, Adyen, Braintree. → AI-powered agents & automation for support, document processing, and predictive analytics, built to plug directly into your existing backend → Production focus from Day 1: Containerized, CI/CD-driven, cloud-native development (Docker, GitHub Actions, AWS/GCP). It works in the real world, not just on my laptop. TECH STACK 🔹 Languages: Golang, Python 🔹 Frameworks: Fiber, Gin, Echo, Flask, FastAPI, Django 🔹 Databases: PostgreSQL, MongoDB, TimescaleDB, CockroachDB, Redis, ElasticSearch, Qdrant, Weaviate. 🔹 Technologies: gRPC, GraphQL, Debezium, JWT/Paseto, WebRTC, Celery, Asynq. 🔹 Messaging/Events: Kafka, RabbitMQ, WebSockets, Webhooks. 🔹 DevOps: Docker, GitHub Actions, Automated Testing. 🔹 Deployments: Clouds(AWS, GCP). 🔹 Integrations: Stripe, Adyen, Braintree, Klaviyo, SearchSpring, Twilio, Google Merchant Center. PAST EXPERIENCE: E-Commerce & Marketplaces: High-concurrency platforms with secure payments, recommendation systems, and advanced product search using ML. Smart Infrastructure & IoT: Vehicle tracking, RFID ingestion, real-time data sync. Fintech & Trading Apps: Live streaming data, ML-driven signals, secure user management. Food & Delivery Platforms: Order lifecycle, payment gateway integrations with Stripe, and delivery logistics handling. AI & NLP: Sentence correction, OCR pipelines, and AI-powered automation. I don’t just write code, I build backend engines that accelerate business growth. Whether you need a new system from scratch or to scale your existing product, I’ll help you architect, develop, and deploy with confidence. Message me with your project plan, current bottlenecks, or architecture challenges, and I’ll provide a free scaling strategy within 12 hours.

ISP Network Engineer with 10+ years of experience in GPON, MikroTik, Linux, DNS, Email Infrastructure, and Hosting Operations. I have more than 10 years of hands-on experience operating real production environments, including an FTTH network, MikroTik routing platforms, GPON OLT systems, SmartOLT automation, hosting infrastructure, and business email systems. Recently received a 5-star Upwork review for DNS, Email Infrastructure, and Technical Operations support, with client feedback highlighting quality, problem-solving, and technical expertise. My experience comes from real operational environments rather than lab-only setups. I work daily with customer provisioning, PPPoE services, network troubleshooting, DNS management, hosting infrastructure, and email delivery systems. ISP & Network Operations • MikroTik RouterOS Administration • GPON OLT Administration (ZTE C620 / C650) • SmartOLT Deployment & Automation • ONU Provisioning & Troubleshooting • PPPoE Services & Subscriber Management • VLAN Configuration, Routing & Switching • VPN & WAN Failover Solutions • ISP Customer Provisioning & Operations Linux, Hosting & DNS • Ubuntu Linux Administration • VPS & Hosting Management • cPanel & WHM Administration • DNS Troubleshooting & Migration • Cloudflare Administration • SSL Certificates • Website & Email Migration • WordPress Hosting & Troubleshooting Email Infrastructure • Microsoft 365 Administration • Google Workspace Administration • SPF, DKIM, DMARC & MX Records • Email Deliverability Troubleshooting • Email Routing & Forwarding • SMTP Configuration I focus on identifying root causes, solving technical issues efficiently, and building reliable solutions that work in real production environments. Available for GPON, MikroTik, SmartOLT, Linux, DNS, Email Infrastructure, Hosting, WordPress, ISP Operations, and Network Troubleshooting projects.

Slow databases? Production outages? Performance bottlenecks affecting your business? I help organizations identify root causes, optimize database performance, and build reliable database platforms. I am a senior database administrator (DBA) with over 13 years of hands-on experience managing production database systems. I specialize in MySQL, MariaDB, PostgreSQL, SQL Server, MongoDB adn Oracle, providing database troubleshooting, incident response, daily operations and maintenance, performance optimization, and reliable backup, high availability, and disaster recovery solutions for mission-critical environments. 🔍 Database Expertise: With over 13 years as a senior expert in MySQL/MariaDB/Percona/PostgreSQL/MongoDB/Oracle/SQL Server/DuckDB, I’ve managed over 5000 databases and 300 TB+ of data. My experience covers database architecture, performance optimization, backup and recovery, High availability, disaster recovery, and much more. I ensure every database solution I deliver is robust, scalable, high performance, and perfectly aligned with your business needs. 🛠️ Technology Stack: MySQL/Percona (Versions 5-9) MariaDB (Versions 5-12): Installation、High Availability, Replication, and Scalability Solutions、InnoDB Cluster、Group Replication、Workbench/Shell/Router、Backup & Restore、Galera Cluster、Percona XtraDB Cluster、XtraBackup、Toolkit、InnoDB/MyISAM/Binlog、Orchestrator、replication-manager. PostgreSQL (Versions 7-18): Installation、High Availability, Replication, and Scalability Solutions、SQL Tuning、pgpool-II、PostGIS、TimescaleDB、ClickHouse、Patroni、Citus、pgvector、Security、Supabase、Neon. MongoDB (Versions 3-8) / MongoDB Atlas : Installation、MongoDB Shell (mongosh)、Aggregation、Indexes、Atlas、Time Series、Change Streams、Replication、Sharding、Storage、Administration、Security. SQL Server (Versions 6.5 – 2025): Installation、High Availability and Disaster Recovery (Always On AG, FCI, Log Shipping, Replication)、Distributed Availability Groups、SQL Server Management Studio / Azure Data Studio / sqlcmd、Backup & Restore、Failover Cluster / Always On Solutions、PowerShell dbatools / First Responder Kit、Storage Engine / Transaction Log / Change Data Capture. Other Database : Oracle、DB2、Redis、SQLite、DuckDB、DocumentDB Cloud service providers: AWS RDS、AWS Aurora、Amazon DocumentDB、GCP、Azure、N8N creator. Certifications: I hold certifications from Cisco, Oracle, MySQL, AWS, ITIL, PMP, and TOGAF, ensuring I bring industry-recognized expertise to every project. 📈 Why Choose Me? Proven Experience: Worked for leading ICT and IoT solution providers, supporting major operators, banking, and financial enterprises. End-to-End Solutions: From designing high availability architectures to delivering query optimizations and backup solutions, I offer complete database management expertise. Training & Support: I also provide course training for companies looking to empower their teams with database-related skills. 🤝 Let’s Collaborate: If you’re looking for a seasoned database professional to tackle challenges in MySQL, PostgreSQL, MongoDB, Oracle, or other database technologies, let’s discuss how I can help streamline your operations and enhance performance. 📩 Contact Me: I’m ready to dive into your project. Reach out, and let’s unlock the full potential of your data infrastructure together!

I build financial models and automation systems for businesses that need cleaner decisions, faster reporting, and less manual work. My background is 3 years in a Fortune 500 regional treasury center—cash operations, payments, FX hedging, and management reporting across multiple entities and currencies. That gives me a practical finance lens when I build models, dashboards, and operational tools. What I build: Finance & Reporting —Cash flow forecasts (13-week rolling, multi-entity) —FX exposure analysis and hedging frameworks —Budget models, variance tools, and SOX compliance templates —Excel and Power BI dashboards for treasury and operations Automation & AI Workflows —WhatsApp AI chatbot systems (intent classification, auto-reply, human escalation, CRM sync) using n8n+official WhatsApp API —Lead qualification workflows with AI scoring and pipeline tracking —Data sync pipelines between WhatsApp, GoHighLevel, and PostgreSQL —Operator consoles and support analytics dashboards I work where finance, operations, and automation overlap—turning messy business processes into structured, documented systems. Tools: Excel, Power BI, n8n, FastAPI, PostgreSQL, WhatsApp Business API, GoHighLevel, Next.js, LLMs. Async communication (English & Chinese). Deliverables in Excel, Power BI, n8n workflow JSON, or deployed web apps—structured and ready to hand off.

Expert Network Engineer & System Administrator | MikroTik Certified Summary: With a proven track record in network engineering and system administration, I offer a comprehensive skill set and a commitment to delivering excellence. As a certified MikroTik Network Associate, I specialize in designing, implementing, and optimizing networks for optimal performance and security. My expertise spans dynamic routing, network security, VPN setup, load balancing, and more, making me a reliable partner for your infrastructure needs. Key Skills: - Dynamic Routing & Optimization: Proficient in OSPF and BGP protocols, ensuring efficient traffic management and network scalability. - Robust Network Security: Implementing robust firewalls, intrusion detection systems, and encryption protocols to safeguard against cyber threats. - Advanced VPN Solutions: Configuring secure VPN tunnels for remote access and interconnecting geographically dispersed networks. - Load Balancing & Failover: Designing resilient architectures with load balancing and failover mechanisms to ensure high availability. - Quality of Service (QoS): Prioritizing network traffic for critical applications and services to maintain optimal performance. - Captive Portal Setup: Deploying captive portals for seamless guest authentication and access control in wireless networks. - DNS & Email Server Setup: Setting up and managing DNS servers and email servers for reliable communication infrastructure. - RADIUS Authentication: Configuring RADIUS servers for centralized authentication, authorization, and accounting. - Wireless Network Expertise: Designing and optimizing wireless networks, including long-range point-to-point links for seamless connectivity. - Monitoring & Management Tools: Proficient in utilizing Zabbix and other monitoring tools for proactive network management and troubleshooting. - VoIP Technologies: Experience with Asterisk and Vicidial for deploying VoIP solutions tailored to business needs. Additional Skills: - Programming Proficiency: Skilled in back-end languages such as Python and Bash scripting for automation and customization. - Web Hosting & Development: Experienced in web hosting management and front-end development to complement network infrastructure. Certifications: MikroTik Certified Network Associate (MTCNA), MikroTik Certified Routing Engineer (MTCRE) About Me: Driven by a passion for technology and a commitment to excellence, I thrive in dynamic environments where I can leverage my skills to solve complex challenges and drive business success. With a keen eye for detail and a proactive approach to problem-solving, I ensure that network infrastructures not only meet current needs but are also scalable and adaptable to future requirements.

I am a Power System Engineer specializing in grid studies, relay protection, and dynamic simulation for transmission, distribution, solar, wind, BESS, and industrial power systems. I help utilities, EPCs, developers, and consultants prepare accurate system models, protection settings, simulation results, and submission-ready technical reports using DIgSILENT PowerFactory, ETAP, PSCAD/EMTDC, and PSS®E. Core services: • Load flow and voltage profile studies • Short-circuit studies according to IEC 60909 / ANSI • N-1 / N-2 contingency analysis • Reactive Power Capability Study • Grid Code Compliance Study • Electrical equipment selection based on power system study results • Protection coordination and relay settings • Arc flash hazard analysis according to IEEE 1584 • Grid Impact Assessment and interconnection studies • Renewable integration studies for solar PV, wind, and BESS • Harmonic and resonance studies • EMT studies: transformer energization, switching transients, lightning, LVRT/HVRT • MOD / PRC / Grid Code compliance Software: • DIgSILENT PowerFactory • ETAP • PSCAD / EMTDC • PSS®E Typical deliverables: • Technical report in PDF / Word format • Simulation model files when required • Short-circuit and load-flow result tables • Protection settings and TCC curves • Arc flash incident energy tables and label data • Compliance summary and recommendations • Excel calculation sheets Relevant experience includes: • PRC-023 / PRC-025 relay setting compliance reviews • MOD-025 / MOD-026 / MOD-027 support for renewable and generation projects • Arc flash studies for MV and LV systems • PSCAD EMT and DIgSILENT RMS/EMT studies for solar, wind, and BESS projects • Harmonic, resonance, switching transient, and insulation coordination studies My focus is to provide clear engineering results, practical recommendations, and reports that can be reviewed by utilities, owners, EPCs, lenders, and technical consultants.