Build KNIME Workflows

We are looking for an experienced KNIME developer to build and test a structured KNIME workflow based on an already-defined process and workflow diagram.

The workflow will:

read specific worksheets from one Excel workbook;
validate and filter project/bidder data;
scan a folder structure containing bidder working files;
identify and classify files based on filename/path rules;
group and pivot the results;
join the folder-scan results with the Excel register;
apply deterministic readiness rules;
produce a final multi-sheet Excel output report.

The workflow must handle 1 to 10 bidders dynamically, without fixed branches for each bidder.

We will provide:

the workflow logic and block diagram;
a detailed build guidance document;
a populated Excel test workbook;
sample folder/file structures;
expected outputs and test cases.

The freelancer should be comfortable with nodes such as Excel Reader, Row Filter, Rule Engine, String Manipulation, GroupBy, Pivoting, Joiner, Cross Joiner, Unpivoting and Excel Writer.

The main requirement is to build the workflow correctly, test it against the supplied dummy data, fix any issues and provide the completed KNIME workflow with brief technical notes.

Experience with recent versions of KNIME Analytics Platform is required.