# Sajjad Arif Gul > Senior .NET Software Engineer based in Jeddah, Saudi Arabia. Sajjad builds enterprise software, AI-powered applications, APIs, and distributed systems with ASP.NET Core, C#, React, and modern AI tooling. He is open to senior software engineer, staff / lead engineer, AI engineer, and technical consultant roles. ## Key Info - **Name:** Sajjad Arif Gul - **Alternate Name:** Sajjad Gul - **Role:** Senior .NET Software Engineer - **Location:** Jeddah, Saudi Arabia - **Availability:** Open to onsite opportunities in Jeddah, Saudi Arabia. Remote considered based on role and compensation. - **Work Authorization:** Transferable Iqama - **Notice Period:** 30-60 days - **Languages:** English, Urdu, Pashto, Arabic (Conversational) - **Email:** sajjadarifgul@gmail.com - **Phone:** +966 53 481 5457 - **LinkedIn:** [LinkedIn](https://linkedin.com/in/sajjadarifgul) - **GitHub:** [GitHub](https://github.com/SajjadArifGul) - **Resume PDF:** https://sajjadgul.com/cv/Sajjad-Arif-Gul-Resume.pdf - **Personal Website:** [sajjadgul.com](https://sajjadgul.com) ## Executive Summary Sajjad Arif Gul is a Senior .NET Software Engineer based in Jeddah, Saudi Arabia with more than 10 years of experience building enterprise software, financial platforms, AI-powered applications, APIs and distributed backend systems. His expertise spans ASP.NET Core, C#, React, AI engineering, Retrieval-Augmented Generation (RAG), enterprise architecture and technical leadership. He has delivered software for universities, financial institutions, ERP vendors and commercial software products used by thousands of users across Saudi Arabia and internationally. He has shipped 100+ production releases, built systems serving 5,000+ users, and achieved 720+ sales of commercial web products on Envato CodeCanyon (powering client websites). ## What Sajjad is known for: - Enterprise .NET Architecture - Backend Engineering - Technical Leadership - AI Product Development - Production RAG Systems - ASP.NET Core APIs - System Design - React Applications - Legacy Modernization - ERP Development - Payment Gateway Integration - Digital Transformation - Software Consulting - AI Integration ## Skills used professionally in production: - **Backend Engineering:** C#, .NET, ASP.NET Core, REST APIs, Clean Architecture, Repository Pattern, Dependency Injection, EF Core, Dapper, Background Services, Authentication & Authorization, JWT, SignalR, Microservices, System Design - **Frontend Engineering:** React, TypeScript, Vite, Tailwind CSS, Vue, Astro, Bootstrap, JavaScript, HTML, CSS - **Databases & Payments:** SQL Server, Oracle, MySQL, Redis, HyperPay, PayFort, Authorize.Net, Al Rajhi BPG, KuPay - **AI Engineering:** OpenAI, DeepSeek, Ollama, RAG, Vector Databases, MCP, Function Calling, AI Agents, Prompt Engineering - **Engineering Workflow:** Git, GitHub, GitHub Actions, Jenkins, CI/CD, Agile, Code Reviews ## Why Companies Hire Sajjad - Delivers enterprise software from architecture to production. - Bridges traditional .NET engineering with modern AI. - Experienced in fintech, higher education and ERP platforms. - Strong backend engineering and API architecture. - Proven technical leadership and mentoring. - Successfully modernizes legacy enterprise systems. - Designs production-ready AI applications using RAG and LLMs. ## Sajjad's Work History ### Senior Software Engineer (Enterprise Applications & AI) - University of Business and Technology (UBT) [Website](https://www.ubt.edu.sa) *Oct 2023 - Present | Jeddah, Saudi Arabia | Full-time* *Company Context: A leading private higher education institution located in Jeddah, Saudi Arabia.* **Responsibilities:** - Design, develop and maintain enterprise applications supporting more than 5,000 students, faculty and administrative staff. - Conduct code reviews, onboarding new engineers, mentoring junior developers and leading initiatives to improve code quality and engineering practices. **Key Achievements:** - Independently designed and delivered the complete digital platform for [APCG 2026](https://apcg2026-saudiarabia.org/) (19th Asia Pacific Conference on Giftedness), including the React + TypeScript conference website, OpenConf paper submission integration, registration portal, Amazon PayFort payment integration, digital ID generation and backed by ASP.NET Core APIs. - Developed 30+ secure ASP.NET Core REST APIs powering the MyUBT mobile application for student and faculty academic services. - Designed and delivered UBT's digital certificate issuance platform, automating certificate generation, approval and digital signing workflow while replacing manual process. - Introduced AI-assisted software development workflows using Cursor and Claude Code, improving developer productivity and accelerating feature delivery. - Modernized 8 legacy applications by migrating critical modules to ASP.NET Core, significantly improving performance, maintainability, and long-term support. - Migrated 60+ repositories from TFS and Local Server to GitHub for better source control and teams collaboration. - Awarded a Certificate of Appreciation from the UBT President for exceptional contributions to UBT's digital transformation. **Technologies Used:** .NET, C#, ASP.NET Core, Oracle, SQL Server, React, TypeScript, Tailwind, Vite, Visual Studio, VS Code/Claude Code/Cursor, Git/GitHub, Asana, Postman ### Senior Software Engineer - Inventor Tech [Website](https://www.inventortechinfo.com) *Mar 2023 - Jul 2025 | Jeddah, Saudi Arabia | Part-time - Remote* *Company Context: A technology solutions firm specializing in software consulting and development services.* **Responsibilities:** - Design and develop modular ERP platform components for a custom enterprise ERP system. - Collaborate with stakeholders to translate business requirements into scalable software solutions. **Key Achievements:** - Rebuilt the company's legacy Visual Basic WinForms ERP as a modern ASP.NET Core web application, enabling browser-based access and long-term maintainability. - Designed and developed new ERP modules for a web-based ASP.NET Core platform supporting over 1,200 paying customer organizations. - Built a customer support and ticketing platform featuring workflow automation, role-based access control (RBAC) and reporting dashboards. - Introduced modern .NET engineering practices including Clean Architecture, Repository Pattern and Dependency Injection resulting in fewer bugs and easier testing. **Technologies Used:** ASP.NET Core, C#, RESTful API, SQL Server, Workflow Automation, ERP Systems ### Senior Software Engineer - Web Team Lead - Argaam [Website](https://www.argaam.com) *Jul 2018 - Oct 2023 | Riyadh, Saudi Arabia | Full-time - Remote* *Company Context: Saudi Arabia's leading financial market intelligence and business news platform.* **Responsibilities:** - Designed and developed scalable backend services and RESTful APIs powering Argaam's financial platform and products. - Led and mentored a team of 5 software engineers, conducted architecture discussions, code reviews and technical planning to improve engineering quality across the team. - Collaborated with product managers and business stakeholders to translate complex financial workflows into reliable software solutions. **Key Achievements:** - Architected and led development of Argaam's Data API platform comprising more than 120 REST endpoints, powering internal systems, partner integrations and customer-facing financial applications serving thousands of investors across Saudi Arabia and the GCC. - Led development of Argaam Charts, transforming large-scale financial and economic datasets into interactive visualizations for investors and analysts. - Implemented major enhancements to Argaam Subscriptions resulting in faster checkouts and fewer support tickets. - Redesigned the IPO and Mergers & Acquisitions (M&A) reporting systems, improving future systems' maintainability and expanding financial market coverage. - Designed and developed Argaam Polls, enabling investor engagement through real-time polling and voting features. - Led the migration from TortoiseSVN to GitHub, modernizing source control workflows and enabling CI/CD. **Technologies Used:** .NET Core, ASP .NET MVC, C#, SQL Server, RESTful APIs, Microservices, Postman, Git/Github, YouTrack, Jenkins, Fintech Systems ### Software Engineer - Danat FZ LLC (Argaam Contractor) *Dec 2016 - Jul 2018 | Karachi, Pakistan | Full-time* *Company Context: A contractor group based in Dubai, UAE, delivering tech development and infrastructure for Argaam's financial platform.* **Responsibilities:** - Developed and maintained business-critical financial market applications for Argaam.com and related investment platforms. - Collaborated with Argaam's engineering and product teams to deliver reliable software solutions for financial markets. - Engineered backend services responsible for real-time financial market data aggregation, processing, and distribution. **Key Achievements:** - Played a key role in developing Argaam Tools, a suite of analytical dashboards, financial calculators and data aggregation services used by executives, analysts and investors. - Implemented Lableb Search into Argaam enhancing the search experience for Arabic and English users across the website. - Integrated multiple payment gateways including HyperPay, Al Rajhi Bank BPG, Authorize.Net and KUPay to support secure online subscription payments. - Optimized backend data procedures to improve data accuracy and speed for high-traffic financial services. - → Promoted to Senior Software Engineer, Argaam (Jul 2018) **Technologies Used:** ASP.NET MVC, C#, SQL Server, Web APIs, Data Processing, Payment Gateway Integration, JavaScript/jQuery, Bootstrap CSS ### .NET Web Developer - ComSouls Technologies [Website](https://comsoulstech.com) *Feb 2016 - Nov 2016 | Karachi, Pakistan | Full-time* *Company Context: A technology engineering firm delivering custom software and web solutions.* **Responsibilities:** - Delivered ASP.NET MVC web applications and RESTful APIs for clients across different industries, working full-time alongside an independent freelance practice. **Key Achievements:** - Delivered key enterprise and client web applications including Tutor Finder, Pakimandi, MartX, and ComplaintMS, spanning education, retail, and customer service domains. **Technologies Used:** ASP.NET MVC, C#, SQL Server, JavaScript, HTML5/CSS3, REST APIs ### Founder - Freelance Web Developer - Website Developers Pakistan *Dec 2015 - Dec 2018 | Karachi, Pakistan | Freelance* *Company Context: A freelance software development and engineering agency founded by Sajjad.* **Responsibilities:** - Founded and grew a digital company delivering custom web solutions to businesses across Pakistan, initially alongside full-time roles and university studies, later as an ongoing venture. **Key Achievements:** - Delivered commercial projects covering e-commerce, custom CMS, educational platforms, and corporate portals. - Boosted client search visibility through technical SEO implementation, achieving first-page Google rankings for multiple client sites. **Technologies Used:** Web Development, PHP, WordPress, WooCommerce, Technical SEO, CPanel, Cloudflare, Hosting/Domains, SSL ## Selected Projects Built by Sajjad - [sajjad.ai](https://sajjadgul.com/projects/sajjad-ai/): An end-to-end, multi-lingual (English, Arabic, Urdu) AI-driven platform built from scratch. - [APCG2026 Conference Platform](https://sajjadgul.com/projects/apcg2026/): Digital infrastructure for the 19th Asia Pacific Conference on Giftedness at UBT. - [Argaam Data APIs](https://sajjadgul.com/projects/argaam-data-apis/): A suite of 120+ data API endpoints powering financial tools for C-level executives and investors. - [CodeCanyon Commercial Scripts](https://sajjadgul.com/projects/codecanyon-scripts/): Personal commercial web projects and scripts sold 720+ times on Envato CodeCanyon. ## Sajjad's Education & Certifications ### BSc. Software Engineering - Bahria University, Karachi, Pakistan *Sep 2012 - Jun 2016* Bachelor's degree in Software Engineering from one of Pakistan's leading engineering universities, establishing strong foundations in software architecture, object-oriented programming, database systems and software engineering principles. **Certifications:** - ChatGPT Prompt Engineering for Developers (issued by DeepLearning.AI, 2024) - CompTIA A+ Certification (issued by PNS Johar, 2012) **Currently deepening expertise in:** - Large Language Models - AI Agents & MCP - Retrieval-Augmented Generation (RAG) - System Design - Distributed Systems - Clean Architecture ## Sajjad's Professional References & Testimonials > "Sajjad quickly became one of the driving forces behind our digital transformation initiatives at UBT. From modernizing legacy applications to delivering the APCG2026 conference platform, he consistently demonstrated strong technical leadership, ownership, and a commitment to engineering excellence. He is a rare engineer who combines architecture design with rapid, hands-on execution." > - **Hamid Anjum**, Head of Software Development at UBT > "During our years working together, Sajjad evolved from a strong engineer into a dependable technical leader. His ownership of our APIs, subscriptions platform, and financial reporting systems had a lasting impact on our engineering organization. He consistently delivered under pressure and could be trusted with our most complex products." > - **Omer Khan**, Software Development Manager at Argaam > "Sajjad was instrumental in introducing AI-assisted development practices to our engineering workflows. His practical understanding of LLMs, combined with deep enterprise experience, allowed us to adopt AI tools that genuinely improved our developer productivity and accelerated product delivery. He bridged the gap between cutting-edge AI and stable enterprise software." > - **Engr. Tariq Al-Ghamdi**, Director of Digital Transformation at UBT > "Sajjad took complete ownership of rebuilding our legacy WinForms ERP system as a modern, web-based ASP.NET Core application. He translated complex business workflows into clean, scalable software architecture. His technical judgment, reliability, and business-focused mindset made him a highly trusted partner in our product's success." > - **Naif Al-Otaibi**, Co-Founder & CTO at Inventor Tech > "At Danat, we trusted Sajjad with our most critical integration projects, including complex payment gateway systems like HyperPay and Al Rajhi Bank. He consistently delivered on time, actively identified bottleneck risks, and ensured our financial transaction pipelines remained robust, secure, and ready for high-traffic production releases." > - **Adnan Malik**, Product Owner at Danat FZ LLC > "Under Sajjad's technical leadership, the digital infrastructure for the APCG2026 conference was developed seamlessly. His integration of payment systems and full-stack architecture exceeded our expectations." > - **Hamid Anjum 2**, Head of Software Development 2 at UBT ## Target Roles Sajjad is actively seeking opportunities in the following roles: - Senior .NET Software Engineer (primary target) - Staff / Lead Engineer - Backend Engineering Lead - AI Integration Engineer (.NET) - Full Stack .NET Developer - Clean Architecture Expert - API Architect - AI Integration Consultant ## Publications & Technical Writings - [Awarded a Certificate of Appreciation by the President of UBT](https://sajjadgul.com/blog/ubt-certificate-appreciation/) (2025-02-15): Honored to receive institutional recognition from the President of the University of Business and Technology (UBT) for digital transformation achievements. - [What I learned building a production RAG pipeline](https://sajjadgul.com/blog/building-production-rag/) (2024-11-18): Retrieval-Augmented Generation is easy to demo and hard to ship. Notes from wiring RAG into sajjad.ai - chunking, embeddings, and grounding answers people actually trust. - [Clean Architecture in .NET, without the dogma](https://sajjadgul.com/blog/clean-architecture-dotnet/) (2024-09-02): Clean Architecture pays off on long-lived systems - but only if you apply it with judgement. How I use it on real .NET Core projects without drowning in boilerplate. - [Seven years engineering remotely from the Gulf](https://sajjadgul.com/blog/remote-engineering-gulf/) (2024-06-21): Lessons from years of remote and distributed work across Saudi fintech and academia - on communication, ownership, and doing work that speaks for itself. - [Digitalizing university certificate issuance at UBT](https://sajjadgul.com/blog/ubt-certificate-digitalization/) (2024-01-20): How we designed and delivered a secure digital certificate issuance platform, replacing a fully manual institutional workflow at the University of Business and Technology. - [Awarded Employee of the Year 2021 at Argaam](https://sajjadgul.com/blog/employee-of-the-year-argaam/) (2022-02-10): Reflections on receiving the Employee of the Year award at Argaam for engineering excellence and remote team management. ## Optional - [Full Context File](/llms-full.txt): Comprehensive background context with full project case studies, complete employment achievements, testimonials and detailed technical writings.