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Mohammed Osman
Verified Expert in Engineering
Software Developer
Stockholm, Sweden
Toptal member since June 29, 2022
Bio
Mohammed has confidently led a highly skilled team of .NET developers in transforming a large-scale system, leveraging cutting-edge technologies to revolutionize its performance and capabilities. We transitioned the system from outdated technologies to .NET Core, migrated the database from DB2 to SQL server, and modernized the API architecture by replacing SOAP with REST APIs. These strategic upgrades resulted in a significant boost in efficiency, scalability, and overall system performance.
Portfolio
Amazing CV
C#, Generative Artificial Intelligence (GenAI), OpenAI, Zapier...
Billo AB
Azure, Azure Event Hubs, C#, PostgreSQL, MongoDB, Elasticsearch, BankID...
Draft.dev
Technical Writing, Azure, Development, C#.NET, OpenID Connect (OIDC), OpenID...
Experience
- .NET - 10 years
- C# - 10 years
- Azure - 7 years
- Azure DevOps - 6 years
- Entity Framework - 5 years
- Azure Cognitive Services - 5 years
- Technical Writing - 4 years
- Technical Instruction - 4 years
Preferred Environment
Windows, Slack, Microsoft Teams, Linux, Azure
The most amazing...
...thing I've achieved was saving more than 80,000 USD of yearly Azure costs through resource optimization.
Work Experience
Solution Architect
2023 - PRESENT
Amazing CV
- Leveraged GenAI techniques to develop an automated document generation and customization system, enhancing user engagement by providing personalized content based on individual preferences and requirements.
- Utilized Azure services to deploy and scale the GenAI-based solution, ensuring high availability and seamless integration with existing infrastructure.
- Customized GenAI output to fit specific document templates, ensuring consistency and precision in CV and other document formats.
- Incorporated no-code/low-code tools such as Bubble and Zapier to streamline the creation and modification of document generation workflows, reducing development time and improving flexibility.
- Developed an automated CV review tool using GenAI to significantly enhance the accuracy, ATS compliance, and relevance of CV evaluations, offering real-time feedback to users.
- Implemented clean architecture principles and Design Patterns in the system’s back end using C#, ensuring the solution is scalable, maintainable, and easy to extend for future enhancements.
Technologies: C#, Generative Artificial Intelligence (GenAI), OpenAI, Zapier, Make (formerly Integromat), ASP.NET Core, Python, Front-end, Identity & Access Management (IAM), Technical Leadership, Large Language Models (LLMs), Artificial Intelligence (AI), Security, Communication, CTO, Fine-tuning, Retrieval-augmented Generation (RAG), Fractional CTO
Senior Software Consultant
2022 - PRESENT
Billo AB
- Refactoring the project from a monolith to microservices.
- Built innovation features to increase the end product value.
- Coached and helped junior team members become more productive.
Technologies: Azure, Azure Event Hubs, C#, PostgreSQL, MongoDB, Elasticsearch, BankID, ASP.NET Core, Azure Functions, Azure Websites, Web API, Software Development Lifecycle (SDLC), Message Queues, RabbitMQ, Microservices Architecture, Software Design, Startups, Microsoft Visual Studio, Software Development, Identity & Access Management (IAM), Security, Communication
Technical Writer
2021 - PRESENT
Draft.dev
- Wrote several blog articles for famous technology brands.
- Reviewed, analyzed, and provided feedback on the article's outline.
- Updated and improved articles based on clients' and editors' feedback.
Technologies: Technical Writing, Azure, Development, C#.NET, OpenID Connect (OIDC), OpenID, Communication
Technical Trainer
2021 - PRESENT
developintelligence
- Reviewed and provided feedback on the Azure curriculum.
- Taught MCT authorized classes to students across the globe.
- Attended and participated in customer scoping calls to decide the course delivery scope.
Technologies: Azure, GitHub, Solution Architecture, Azure Websites, Communication
Technical Trainer
2019 - PRESENT
Pluralsight
- Created several video courses around cloud computing and machine learning.
- Built several hands-on projects around machine learning.
- Reviewed and analyzed the course plan for several courses.
Technologies: Azure, Amazon Web Services (AWS), Azure Machine Learning, Machine Learning, DevOps, GitHub, C#.NET, Solution Architecture, GitLab CI/CD, Python, Learning Management Systems (LMS), Communication
Senior Software Architect and Developer
2019 - PRESENT
PwC
- Saved more than 70,000 Swedish krona (SEK) of yearly Azure costs through resource optimization.
- Helped on a Global PwC project to unify diverse authentication mechanisms across multiple systems towards a unified authentication active directory.
- Built a REST wrapper around Workday SOAP APIs to make it fast and easy for other internal consumers to consume people's data.
- Implemented OAuth 2.0 authentication protocol for REST APIs to facilitate authorization and authentication. This helped ensure more secure and safe access to sensitive data.
- Built Azure Search API around Workday APIs to enable more versatile and flexible query-based searching by consumers.
- Coached and mentored junior team members, which increased the project's productivity.
- Handled and resolved static code analysis issues using Veracode.
- Led the scrum team, broke down and estimated technical requirements, and communicated with stakeholders.
- Helped several development and data teams in PwC to implement Azure DevOps pipelines to automate deployments, reducing deployment errors and saving time.
- Researched, designed, and developed PwC event-driven architecture to enable seamless and real-time communication across PwC systems.
Technologies: Azure, ASP.NET, ASP.NET MVC, Azure Cognitive Services, Azure Machine Learning, Azure API Management, Azure Service Bus, Azure Search, Veracode, Storage, SOAP, REST, Azure Service Fabric, Microsoft SQL Server, .NET, .NET Core, Terraform, Azure DevOps, Visual Studio, Chatbots, Technical Requirements, Visio, Modeling, Azure Event Hubs, Domain-driven Design (DDD), Integration, Architecture, CI/CD Pipelines, SQL, Software Architecture, C#.NET, Test-driven Development (TDD), Docker, Cloud Platforms, Authentication, GraphQL, gRPC, Microservices, Azure Functions, Secure Web Development, Web Security, REST APIs, Web Development, Databases, Cloud, Quality Assurance (QA), QA Automation, Unit Testing, Integration Testing, Messaging, .NET 4, Microsoft Azure, Web App Development, .NET 6, Solution Architecture, API Integration, Full-stack Development, Data Privacy, Azure SQL, Azure Websites, Web API, Azure SQL Databases, Enterprise Integration Patterns (EIP), Software Development Lifecycle (SDLC), Message Queues, Microservices Architecture, CQRS, Event Sourcing, React, Python, Software Design, Microsoft Visual Studio, Software Development, OpenID Connect (OIDC), Front-end, Identity & Access Management (IAM), OpenID, Artificial Intelligence (AI), Security, Communication
Full-stack Developer
2023 - 2025
Commonwealth Financial Network
- Refactored legacy security systems, enhancing security posture by replacing outdated mechanisms with modern OIDC and OAuth 2.0 authentication, resulting in improved compliance and user authentication efficiency.
- Redesigned React front-end applications to fully integrate with Auth0, improving user authentication experience, boosting security, and reducing manual authentication management by leveraging Auth0's robust authentication features.
- Implemented an automated solution for parsing email attachments and storing them in SharePoint Lists, streamlining document management processes and increasing efficiency in handling important files.
- Led the migration of multiple legacy systems to Microsoft Azure, ensuring scalability, reliability, and performance optimization, which significantly reduced infrastructure maintenance costs.
Technologies: C#.NET, CSS, .NET, React, Full-stack Development, JavaScript, Azure, Content Management Systems (CMS), APIs, OpenID Connect (OIDC), Identity, Visual Basic .NET (VB.NET), Front-end, Identity & Access Management (IAM), OpenID, Technical Leadership, Security, Communication
Back-end Developer
2019 - 2019
HiQ International
- Implemented integrations between PE accounting system and SEB online banking system. This enabled the accountants to use PE accounting to quickly match and reconcile bank transactions with the accounting system.
- Fixed critical bugs and issues that improved the system's performance.
- Participated in requirements analysis, planning, and grooming.
Technologies: ASP.NET, Angular, .NET Core, REST, Integration, CI/CD Pipelines, GitHub, SQL, C#.NET, Kubernetes, Test-driven Development (TDD), Docker, Cloud Platforms, Authentication, Microservices, REST APIs, Web Development, Databases, Cloud, Quality Assurance (QA), QA Automation, Unit Testing, Integration Testing, .NET 4, Microsoft SQL Server, Transact-SQL (T-SQL), Windows Server, Microsoft Azure, Web App Development, Solution Architecture, API Integration, Full-stack Development, Azure Websites, Web API, Software Development Lifecycle (SDLC), Software Design, Microsoft Visual Studio, Software Development, Front-end, Security, Communication
Software Architect and Developer
2017 - 2019
byBrick Development
- Architected and designed the application migration from Java to .NET Core 2.1.
- Architected and designed the database migration from DB2 to SQL Server.
- Worked on the breakdown and cost estimation of requirements.
- Developed and built several features to enable patient management features.
- Handled client requests, analyzed requirements, and made financial cost proposals for change requests.
- Migrated the application from single tenancy to multi-tenancy to accommodate massive acquisition scenarios where multiple companies needed the same system. This enabled the system to scale massively for many clients.
- Interviewed and recruited candidates in technical screening.
Technologies: Visual Studio, Microsoft SQL Server, .NET, IIS, C#, Azure DevOps, ASP.NET MVC, Design Patterns, Windows Communication Foundation (WCF), Costing, Technical Requirements, Integration, Architecture, CI/CD Pipelines, GitHub, SQL, Software Architecture, ASP.NET Web Forms, C#.NET, Test-driven Development (TDD), Cloud Platforms, Authentication, WCF Web Services, REST APIs, Web Development, Databases, Cloud, QA Automation, Unit Testing, .NET 4, Transact-SQL (T-SQL), Windows Server, Microsoft Azure, Web App Development, Solution Architecture, API Integration, Full-stack Development, Azure SQL, Multitenancy, Web API, Software Development Lifecycle (SDLC), Microsoft Power BI, Software Design, Microsoft Visual Studio, Software Development, OpenID Connect (OIDC), Front-end, OpenID, Security, Communication
Integration Consultant
2015 - 2016
Ericsson
- Developed APIs from the billing and charging system to external telecom systems.
- Consulted customers on technical solutions and resolved conflicts.
- Led remote support teams in India, Europe, and several places across the globe.
Technologies: Visual Studio, Oracle Database, .NET, Linux, Billing Systems, Online Charging Systems (OCS), Operations & Business Support Systems (OSS/BSS), Java, Scripting, Integration, SQL, Authentication, REST APIs, Web Development, Databases, QA Automation, Unit Testing, Microsoft SQL Server, Web App Development, Solution Architecture, Full-stack Development, Software Development Lifecycle (SDLC), Software Design, Microsoft Visual Studio, Software Development, Communication
Software Developer
2012 - 2015
Banan IT
- Developed features and fixed critical bugs and issues.
- Suggested improvements and enhancements to the project, including an email service solution to increase email deliverability.
- Refactored and redesigned some parts of the project.
Technologies: Visual Studio, .NET, Microsoft SQL Server, Windows Presentation Foundation (WPF), Windows Communication Foundation (WCF), WIF, Entity Framework, SQL, C#.NET, Test-driven Development (TDD), Authentication, WCF Web Services, SignalR, Web Development, Databases, REST APIs, QA Automation, Unit Testing, .NET 4, Transact-SQL (T-SQL), Web App Development, Full-stack Development, Multitenancy, Web API, Software Design, Microsoft Visual Studio, Identity & Access Management (IAM)
Experience
Sweden Central Insurance Register
Led a team of five developers in creating a comprehensive insurance management application for Sweden, achieving 100% efficiency improvements.
As the team lead and back-end developer, I successfully migrated data from DB2 to SQL Server, reducing database maintenance time by more than 200%.
I collaborated with developers to develop and implement new RESTful and SOAP APIs, enhancing system interoperability and increasing API response times by 50%.
As the team lead and back-end developer, I successfully migrated data from DB2 to SQL Server, reducing database maintenance time by more than 200%.
I collaborated with developers to develop and implement new RESTful and SOAP APIs, enhancing system interoperability and increasing API response times by 50%.
Billo Digital Mailing
http://www.billo.lifeContributed to the transformation of Billo, a digital mailing app in Sweden, achieving a shift from printed pages to digital letters and processing over 100,000 letters daily.
As a back-end team member, I successfully refactored the system architecture from monolith to microservices, increasing scalability and adaptability to meet growing demand.
I integrated the Swedish BankID security system into the application, enhancing user trust and security.
I also coached and mentored two junior developers, fostering their professional growth and increasing team productivity
As a back-end team member, I successfully refactored the system architecture from monolith to microservices, increasing scalability and adaptability to meet growing demand.
I integrated the Swedish BankID security system into the application, enhancing user trust and security.
I also coached and mentored two junior developers, fostering their professional growth and increasing team productivity
Senior Software Developer and Architect at PwC
http://www.pwc.seAt PwC, I contributed to the Architecture Council, driving strategic and technical decision-making for upcoming application needs, resulting in improved solution alignment with business requirements.
I specialized in application development and cloud, providing expertise in architecture patterns and Microsoft Azure services, leading to 70%+ increased efficiency in cloud resource utilization.
I have offered valuable input and feedback on 50+ application projects, promoting best practices and enhancing overall architectural quality.
I specialized in application development and cloud, providing expertise in architecture patterns and Microsoft Azure services, leading to 70%+ increased efficiency in cloud resource utilization.
I have offered valuable input and feedback on 50+ application projects, promoting best practices and enhancing overall architectural quality.
COVID-19 Support System
https://github.com/smarter-code/Covid19I completed a pro bono project for the Ministry of Health in Sudan, significantly improving COVID-19 case management and patient administration across multiple hospitals.
As a solo developer, I designed and implemented a comprehensive solution that streamlined the management of COVID-19 cases, resulting in increased efficiency in patient administration.
I demonstrated dedication and technical expertise by independently managing all aspects of the project, leading to successful deployment and positive user feedback.
As a solo developer, I designed and implemented a comprehensive solution that streamlined the management of COVID-19 cases, resulting in increased efficiency in patient administration.
I demonstrated dedication and technical expertise by independently managing all aspects of the project, leading to successful deployment and positive user feedback.
Legacy Login to OIDC Refactoring
I led the design and implementation of a new login solution that utilizes the OIDC protocol, replacing the previous custom system. This innovative solution enhances security and user experience, ensuring that only authorized individuals can access critical systems. By adopting OIDC, we have increased the reliability of our authentication process while safeguarding systems that manage billions of dollars in assets. This strategic shift not only strengthens our security posture but also streamlines user access across our organization.
Software Developer
Redesigned React front-end applications to fully integrate with Auth0, improving user authentication experience, boosting security, and reducing manual authentication management by leveraging Auth0's robust authentication features.
Education
2016 - 2017
Master's Degree in Information Systems
Lund Univeristy - Lund, Sweden
2008 - 2013
Bachelor's Degree in Electrical Engineering and Computer Science
University of Khartoum - Khartoum, Sudan
Certifications
AUGUST 2023 - PRESENT
Designing Microsoft Azure Infrastructure Solutions
Microsoft
AUGUST 2023 - PRESENT
Microsoft Certified: Azure Solutions Architect Expert
Microsoft
APRIL 2022 - PRESENT
Microsoft Azure Administrator Associate
Microsoft
JUNE 2021 - PRESENT
Microsoft Certified | Azure Data Scientist Associate
Microsoft
FEBRUARY 2021 - PRESENT
Microsoft Certified | Azure Developer Associate
Microsoft
JUNE 2020 - PRESENT
Microsoft Certified Trainer (MCT)
Microsoft
OCTOBER 2018 - PRESENT
Microsoft® Certified Solutions Associate | Web Applications
Microsoft
MAY 2018 - PRESENT
Professional Scrum Master I
Scrum.org
NOVEMBER 2017 - PRESENT
Programming in HTML5 with Java Script and Css3
Microsoft
JUNE 2016 - PRESENT
Experienced Integration Engineer
Ericsson
DECEMBER 2015 - PRESENT
Ericsson IP Technology
Ericcson
MARCH 2015 - PRESENT
Programming in C#
Microsoft
MARCH 2015 - PRESENT
ITIL
Exin
Skills
Libraries/APIs
REST APIs, Web API, Entity Framework, React, OpenID, Azure Cognitive Services, Azure API Management, SignalR
Tools
Visual Studio, Microsoft Visual Studio, Slack, Microsoft Teams, GitHub, RabbitMQ, Azure Machine Learning, Azure Search, Terraform, Visio, GitLab CI/CD, Microsoft Power BI, Zapier, Make (formerly Integromat)
Languages
C#, C#.NET, SQL, HTML, HTML5, TypeScript, JavaScript, CSS, Java, GraphQL, Transact-SQL (T-SQL), Python, Visual Basic .NET (VB.NET)
Frameworks
.NET, .NET Core, .NET 4, ASP.NET Core, ASP.NET, ASP.NET MVC, Angular, Windows Presentation Foundation (WPF), WIF, ASP.NET Web Forms, gRPC, .NET 6, Blazor
Paradigms
REST, Test-driven Development (TDD), Azure DevOps, DevOps, Microservices, Unit Testing, Microservices Architecture, CQRS, Event Sourcing, Scrum, Design Patterns
Platforms
Windows, Azure, Azure Functions, Azure Event Hubs, Windows Server, Azure Service Fabric, Oracle Database, Linux, Amazon Web Services (AWS), Kubernetes, Docker
Storage
Microsoft SQL Server, Databases, PostgreSQL, Azure SQL, Azure Websites, Azure SQL Databases, MongoDB, Elasticsearch
Other
Back-end, APIs, Integration, Cloud Platforms, Web Development, Cloud, Web App Development, API Integration, Software Development Lifecycle (SDLC), Software Design, Code Review, Software Development, Communication, Technical Writing, Technical Instruction, Domain-driven Design (DDD), Full-stack, Architecture, CI/CD Pipelines, Software Architecture, Authentication, WCF Web Services, Secure Web Development, Web Security, Quality Assurance (QA), QA Automation, Integration Testing, Messaging, Microsoft Azure, Solution Architecture, Full-stack Development, Data Privacy, Enterprise Integration Patterns (EIP), Message Queues, Startups, OpenID Connect (OIDC), Front-end, Identity & Access Management (IAM), Large Language Models (LLMs), Artificial Intelligence (AI), Security, CTO, Fine-tuning, Fractional CTO, Software, IT, Data Science, Telecom Business Support Systems (BSS), Networks, ITIL V3 Foundation Certified, MCT, Azure Service Bus, Veracode, Storage, SOAP, Chatbots, Technical Requirements, Modeling, IIS, Windows Communication Foundation (WCF), Costing, Billing Systems, Online Charging Systems (OCS), Operations & Business Support Systems (OSS/BSS), Scripting, Machine Learning, Development, Technical Leadership, BankID, WebAssembly (Wasm), Multitenancy, MCITP, Content Management Systems (CMS), Identity, Generative Artificial Intelligence (GenAI), OpenAI, Learning Management Systems (LMS), Retrieval-augmented Generation (RAG), OfficeJS
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