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Senior .NET Engineer | Legacy Systems & Reverse Engineering (Onsite)

SSC HR Solutions

Workable
Location
Cairo, Cairo Governorate, Egypt, Egypt
Type
Not specified
Salary
Salary not specified
Posted
15 Oct 2026
What is to be done • Decompile the .NET binaries and read the code (ILSpy, dotPeek or similar). • Review any remaining Classic ASP pages and ASPX sources on the server. • Map the database: schemas, stored procedures, SSIS packages, SQL Agent jobs, replication. • Reconstruct the business logic of each module: data collection, data services, reporting, archiving, user management. • Document every integration from the application side, including aviation feeds such as Type B messages and ACARS. • Interview users, the administrator, finance, and the teams using the other endpoints of each interface. • Write the FSD, Integration Register and Data Dictionary. • Work read-only on production. Report progress daily. The three months Period Focus Hand over Month 1 Obtain access. Decompile the binaries, map the database, build a first picture of the application. Application inventory, decompiled code baseline Month 2 Work through the system module by module. Interview users, the admin, finance and the teams using each interface. FSD drafts, integration register v1 Month 3 Complete and validate everything. Hand over the final documents and brief the decision gate. Final FSD, Integration Regist
What is to be done • Decompile the .NET binaries and read the code (ILSpy, dotPeek or similar). • Review any remaining Classic ASP pages and ASPX sources on the server. • Map the database: schemas, stored procedures, SSIS packages, SQL Agent jobs, replication. • Reconstruct the business logic of each module: data collection, data services, reporting, archiving, user management. • Document every integration from the application side, including aviation feeds such as Type B messages and ACARS. • Interview users, the administrator, finance, and the teams using the other endpoints of each interface. • Write the FSD, Integration Register and Data Dictionary. • Work read-only on production. Report progress daily. The three months Period Focus Hand over Month 1 Obtain access. Decompile the binaries, map the database, build a first picture of the application. Application inventory, decompiled code baseline Month 2 Work through the system module by module. Interview users, the admin, finance and the teams using each interface. FSD drafts, integration register v1 Month 3 Complete and validate everything. Hand over the final documents and brief the decision gate. Final FSD, Integration Register, Data Dictionary Requirements Must have • 7+ years of .NET, with real depth in the Framework era — C# and VB.NET, ASP.NET WebForms. • Hands-on reverse-engineering experience: decompiled and understood production systems with no source and no documentation. • Strong SQL Server: T-SQL, stored procedures, SSIS, SQL Agent, replication. • Integration experience: APIs, SFTP, file exchange and direct database links. • Strong technical writing — we will ask to see examples of created documents. • Fluent English and availability to work on-site in Cairo full-time. Nice to have • Airline systems background: Type B messages, ACARS, SSIM, Amadeus, Lido, AMOS or SAP. • Arabic. • Classic ASP, SSRS or Crystal Reports. • Previous legacy modernisation or migration work. Who fits • Comfortable working in ambiguity — nothing is written down and there is no one to ask. • Patient with people, precise with facts. • Careful and discreet: sensitive data, read-only discipline, no risky moves on production. • Honest daily and weekly reporting — no surprises at the monthly reviews.