a software engineer needed

Looking at a software engineer to write a documentation for online application as the list below

Software Requirement Specifications
Purpose
Intended Audience
Intended Use
Scope
Definitions and Acronyms
Overall description
User Needs
assumptions and dependencies
Systems features and requirements

Functional Requirements of a system should include the following things:
- Details of operations conducted in every screen
- Data handling logic should be entered into the system
- It should have descriptions of system reports or other outputs
- Complete information about the workflows performed by the system
- It should clearly define who will be allowed to create/modify/delete the data in the system
- How the system will fulfill applicable regulatory and compliance needs should be captured in the functional document

Nonfunctional requirements
- Performance and scalability. How fast does the system return results? How much will this performance change with higher workloads?
- Portability and compatibility. Which hardware, operating systems, browsers, and their versions does the software run on? Does it conflict with other applications and processes within these environments?
- Reliability, availability, maintainability. How often does the system experience critical failures? and how much time is it available to users against downtimes?
- Security. How are the system and its data protected against attacks?
- Localization. Does the system match local specifics?
- Usability. How easy is it for a customer to use the system?