About this role

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

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.

Senior .NET Engineer