Fahid is available for hire
Hire FahidFahid Nasir
Verified Expert in Engineering
Software Architect and Full-stack Developer
Hamburg, Germany
Toptal member since April 10, 2025
Bio
Fahid is a highly experienced software architect with 13+ years of experience building secure, scalable, and cloud-native systems across aviation, fintech, and eCommerce. With expertise spanning microservices, full-stack development, and DevOps, he has led engineering efforts at global enterprises and high-growth startups. Fahid drove the development of Lufthansa's VR inflight entertainment (IFE) platform and Klarna's loyalty program, optimizing performance and reliability.
Portfolio
Lufthansa
System Design, C4 Model, Technical Requirements, Aircraft & Airlines...
Klarna
Cloud Computing, Cross-platform App Development, Database Design...
Aion Digital
Cloud Computing, Cross-functional Team Leadership...
Experience
- C# - 13 years
- Database Design - 13 years
- System Design - 10 years
- Cloud Computing - 10 years
- Full-stack Development - 10 years
- Node.js - 10 years
- React - 8 years
- Cross-platform App Development - 8 years
Availability
Full-time
Preferred Environment
React Native, Node.js, System Design, Full-stack Development, C#, React, Cloud Computing, JavaScript, Entity Framework, .NET Core
The most amazing...
...back end I've built is for a VR IFE system—2D/360-degree videos, games, ad targeting, and heatmap analytics—running on a custom mesh network for full coverage.
Work Experience
Software Architect
2022 - 2025
Lufthansa
- Spearheaded the development of a next-gen IFE system, ensuring reliability, security, and OTA updates. Architected cloud-native microservices infrastructure supporting real-time data processing.
- Developed an incremental over-the-air (OTA) update mechanism, improving system reliability.
- Optimized performance, reducing system latency by 40% and enhancing user experience.
- Implemented OWASP, Git branching, and DevOps best practices, maintaining consistency across teams.
- Designed and developed client SDKs, automated documentation, the aircraft simulator, and the virtual environment for 3rd-party app developers.
Technologies: System Design, C4 Model, Technical Requirements, Aircraft & Airlines, Database Design, Full-stack Development, Cross-functional Team Leadership, High Code Quality, JavaScript, Infotainment, Architecture, Software Architecture
Senior Engineer
2020 - 2022
Klarna
- Developed Klarna's loyalty program, leveraging cutting-edge technologies to enhance customer engagement and transaction processing.
- Built cloud-native architecture on AWS with Docker, Kubernetes, and Lambda for optimized performance and resilience.
- Enhanced real-time and flexible data processing using Kafka, improving data streaming and user experience.
- Served as the primary liaison for cross-functional teams, ensuring the smooth adoption of new technologies and flawless feature deployments.
Technologies: Cloud Computing, Cross-platform App Development, Database Design, Microservices Architecture, React, React Native, Node.js, Python, Serverless, Apache Kafka, Splunk, Loyalty Programs, JavaScript, Architecture, Software Architecture
Senior Lead Engineer
2019 - 2020
Aion Digital
- Developed a branchless banking platform with Fast Identity Online (FIDO) security, transforming legacy banking systems into modern cloud-based microservices.
- Designed and implemented secure authentication mechanisms for seamless user access.
- Ensured compliance with global regulatory standards, enabling market expansion.
- Built and implemented a modular system that provides enhanced flexibility for A/B testing, improved security measures, and streamlined configuration options.
- Migrated the legacy banking system from the 80s to modern technologies.
Technologies: Cloud Computing, Cross-functional Team Leadership, Cross-platform App Development, C4 Model, Database Design, Full-stack Development, High Code Quality, Apache Kafka, Microservices Architecture, Node.js, JavaScript, .NET, Architecture, Software Architecture
Back-end Solution Architect
2013 - 2019
Inflight VR
- Designed and developed the back-end architecture for an innovative VR-based inflight marketplace, enhancing passenger experience at 35,000 feet.
- Pioneered a frictionless VR eCommerce experience, increasing inflight engagement.
- Integrated analytics-driven insights, including an engagement heatmap to optimize ad placement, content delivery, and UX.
- Engineered a scalable real-time communication mesh network for multiserver coordination.
- Developed integrations with the AirFi standalone server and Airbus Maid portable server for content delivery.
Technologies: Cloud Computing, Cross-platform App Development, Database Design, Desktop App Development, Aircraft & Airlines, Full-stack Development, C4 Model, High Code Quality, Microservices Architecture, Node.js, C#, Python, React, React Native, JavaScript, .NET Core, .NET, Infotainment, Architecture, Software Architecture
Software Engineer
2012 - 2013
Netsol
- Revamped asset finance and leasing software for major clients like Mercedes, Nissan, and BMW.
- Migrated monolithic systems to modular architecture, improving maintainability.
- Enhanced system efficiency, reducing processing times for financial transactions.
Technologies: C#, Telerik WPF, Microsoft Silverlight, Database Design, JavaScript, Entity Framework, .NET
Experience
My Jet Pool (MJP)
A platform designed as an "Uber for private jets," enabling streamlined jet pooling and booking.
I developed the complete back end using C# and .NET, focusing on core modules such as user management (admin, operators, and customers), jet listings, flight schedules, booking workflows, and access control. The system supported real-time updates, secure data exchange, and scalable booking logic for multiple stakeholders, including operators, jet owners, and administrators.
I developed the complete back end using C# and .NET, focusing on core modules such as user management (admin, operators, and customers), jet listings, flight schedules, booking workflows, and access control. The system supported real-time updates, secure data exchange, and scalable booking logic for multiple stakeholders, including operators, jet owners, and administrators.
Timeslot
https://www.timeslot.app/enA social networking app that helps users meet new people nearby using AI-powered recommendations.
I built the back end in C# and .NET, implementing user authentication, geolocation services, intelligent match-making logic, and real-time chat APIs. The architecture supported horizontal scaling and was optimized for low-latency social interactions, ensuring a smooth and responsive experience for end users.
I built the back end in C# and .NET, implementing user authentication, geolocation services, intelligent match-making logic, and real-time chat APIs. The architecture supported horizontal scaling and was optimized for low-latency social interactions, ensuring a smooth and responsive experience for end users.
Spelling Beast Kids Learning
An educational mobile game designed to improve children's spelling skills through interactive gameplay.
I architected and implemented the back end using .NET, focusing on gameplay logic, progress tracking, custom-level creation, and reporting. Teachers and parents could manage content and view learning progress via detailed analytics; all synced across devices via cloud-based APIs.
I architected and implemented the back end using .NET, focusing on gameplay logic, progress tracking, custom-level creation, and reporting. Teachers and parents could manage content and view learning progress via detailed analytics; all synced across devices via cloud-based APIs.
Gymhopper
https://www.signalhire.com/companies/gymhopper-agA fitness solution that allows users to access partner gyms across cities with a single subscription.
I developed the back-end infrastructure using .NET, including user registration, gym network mapping, subscription management, and partner integration. The system supported seamless check-ins, usage tracking, and multi-city access control, offering a smooth user experience across the Gymhopper network.
I developed the back-end infrastructure using .NET, including user registration, gym network mapping, subscription management, and partner integration. The system supported seamless check-ins, usage tracking, and multi-city access control, offering a smooth user experience across the Gymhopper network.
365hangers
https://www.crunchbase.com/organization/365-hangersA digital content platform for fashion and lifestyle enthusiasts featuring curated articles, trends, and interactive media. I developed and maintained the back end using .NET to manage dynamic content delivery, user profiles, media assets, and category tagging. Scalability and performance were my focus in handling high-traffic spikes and ensuring fast content rendering.
Travis
A travel booking solution to automate the whole trip with automatic booking by integrating taxi services, airline reservations, hotel bookings, and calendar synchronization.
I built the back end with C# and .NET, developing integrations with Google APIs, Outlook, and 3rd-party travel services. Key modules included itinerary management, booking workflows, user preferences, and automated notifications for travel updates.
I built the back end with C# and .NET, developing integrations with Google APIs, Outlook, and 3rd-party travel services. Key modules included itinerary management, booking workflows, user preferences, and automated notifications for travel updates.
Night Rider
An iOS app enabling real-time check-ins at places like restaurants, hotels, and airports.
I built the back end using .NET, integrating Google Places API for location detection. I also developed a custom algorithm to reduce false positives caused by indoor GPS inaccuracies, ensuring precise and intelligent check-ins with location history and analytics.
I built the back end using .NET, integrating Google Places API for location detection. I also developed a custom algorithm to reduce false positives caused by indoor GPS inaccuracies, ensuring precise and intelligent check-ins with location history and analytics.
Chooze
A health-focused mobile app recommending beverages based on user health data and preferences.
I implemented the back-end API server, handling user profiles, recommendation engine logic, and configuration inputs. The system utilized a rule-based engine to tailor results and supported content management for health articles and tips.
I implemented the back-end API server, handling user profiles, recommendation engine logic, and configuration inputs. The system utilized a rule-based engine to tailor results and supported content management for health articles and tips.
Mycenas
A platform for managing art competitions and campaigns, including poster creation and advertising tools.
I developed back-end services to support competition registration, review submissions, campaign management, and user interaction tracking. Admins could easily launch new contests, moderate entries, and manage promotional content.
I developed back-end services to support competition registration, review submissions, campaign management, and user interaction tracking. Admins could easily launch new contests, moderate entries, and manage promotional content.
Momentz
A mobile app for preserving and sharing personal photo memories.
I built the back-end API and services for face detection, collection generation, and the matching engine, focusing on secure photo uploads, album management, privacy controls, and content-sharing features. The API supported media compression, tagging, and timeline organization, ensuring users could revisit and share important memories effortlessly.
I built the back-end API and services for face detection, collection generation, and the matching engine, focusing on secure photo uploads, album management, privacy controls, and content-sharing features. The API supported media compression, tagging, and timeline organization, ensuring users could revisit and share important memories effortlessly.
Education
2010 - 2012
Master's Degree in Information Technology
University of the Punjab - Lahore, Pakistan
Certifications
MARCH 2025 - PRESENT
Generative AI Overview for Project Managers
Project Management Institute (PMI)
APRIL 2024 - PRESENT
SW Development According to ED12C/DO-178C DAL D
Bertrandt Academy
Skills
Libraries/APIs
Node.js, React, Entity Framework
Tools
Splunk, Microsoft Silverlight
Languages
C#, Python, JavaScript
Frameworks
React Native, .NET, C4 Model, .NET Core
Paradigms
Desktop App Development, Database Design, Microservices Architecture
Platforms
Apache Kafka, Telerik WPF
Storage
Amazon S3 (AWS S3)
Other
Full-stack Development, Cross-platform App Development, Cloud Computing, Infotainment, Architecture, Software Architecture, System Design, Technical Requirements, Aircraft & Airlines, Cross-functional Team Leadership, High Code Quality, Serverless, Loyalty Programs, RESTFul APIs, .NET Framework, SDKs, Software Development, Process Development, Verification, PI Planning, Leadership, Agile Program Management, Artificial Intelligence (AI), AI Tools, DO-178B/C, ED-12C, DO-178C, DAL D
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