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I have an automated Excel-based rostering workbook that has been running in production for a while, but a few critical pieces now need attention. The core of the job is to refine the calculation logic. Some totals are coming out wrong, a couple of edge-case rules were never coded, and overall processing speed has slipped as the file has grown. I would like the existing formulas/VBA adjusted so every shift, allowance and overtime rule reconciles accurately, a set of new business rules is added, and execution time is brought back to an instant feel. Alongside that, I need the import/export module expanded. At present it handles only a basic CSV; I want to introduce two additional formats (one XLSX template we use with payroll and a JSON summary we send to Power BI). Clean, reliable parsing and generation of these files is essential, with graceful error handling rather than silent failures. Deliverables • Updated workbook (formulas, VBA or Power Query as appropriate) with corrected and extended calculations • Refactored code or macros delivering noticeable performance gains on a roster of ~2 000 rows • New import/export routines supporting CSV, our payroll XLSX template and JSON • A brief change log and test sheet showing the before/after results for key scenarios Please keep all development inside the existing file structure unless a separate helper module is clearly justified, and comment your code so future tweaks are straightforward. If you have advanced Excel/VBA optimisation tricks or experience integrating Excel with JSON, you will be a perfect fit.
Project ID: 40633471
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125 freelancers are bidding on average $442 AUD for this job

I'd love to work on your project. I can deliver a clean, high-quality solution with fast communication and on-time delivery. Let's discuss the details!
$500 AUD in 7 days
8.6
8.6

Hello, I am an experienced Excel expert holding years of experience with required expertise to perfectly handle this project. I am also available to start on an immediate basis. To make your hiring decision easier, I can share the limited version before you hire and then you can decide if this fulfills your needs or not. I am an experienced Excel professional with years of experience in all the tools of Excel including Visual Basic, Automation, Data Analysis, Complex Formulas, Calculations, Analysis, Financial Modeling etc. Lets discuss more in detail about my previous similar experience and how I am highly suitable for this project. I will be happy to share my portfolio of similar work performed in past.
$250 AUD in 1 day
7.6
7.6

Hi there, I have carefully reviewed the project requirements for enhancing the Excel Rostering Program. I understand the need to refine the calculation logic, address inaccuracies, add new business rules, and improve processing speed. Let's chat and discuss it further. To handle your project, I will start with refining the existing formulas and VBA code to ensure accurate reconciliation of shifts, allowances, and overtime rules. I will also optimize the code for improved performance and add new business rules as required. Additionally, I will expand the import/export module to support CSV, XLSX, and JSON formats with robust error handling. The deliverables will include an updated workbook with corrected calculations, improved performance, and new import/export routines supporting multiple file formats. Before signing-off my bid, I would like to ask a question, i.e., have you considered any specific security requirements for handling JSON data within the Excel workbook? Warm Regards, Aneesa.
$250 AUD in 1 day
6.7
6.7

I can optimize your existing rostering workbook, correct the calculation logic, add the new business rules, and improve performance for 2,000+ rows. I can also implement reliable CSV, XLSX, and JSON import/export with proper error handling and testing. 10+ years Advanced Excel experience, Certified VBA Programmer, Certified Business Analytics, MBA.
$250 AUD in 3 days
6.6
6.6

Hello, I’m Naresh. With over 7+ years of experience in Excel automation, VBA development, Power Query, and business process optimization, ➡️ I specialize in: • Advanced Excel Automation • VBA Macro Development & Optimization • Power Query & Data Transformation • Formula Debugging & Performance Tuning • Import/Export Automation (CSV, XLSX & JSON) • Payroll & Rostering Systems • Power BI Integration • Dashboard & Reporting Solutions I have extensive experience enhancing complex Excel workbooks by optimizing calculations, implementing new business rules, improving macro performance, and building reliable import/export solutions. I can refine your rostering workbook, optimize processing for large datasets, extend the import/export functionality to support CSV, payroll XLSX, and JSON formats, and deliver clean, well-documented code that is easy to maintain. ➡️ I provide: ✔ Optimized Formulas, VBA & Power Query ✔ High-Performance Code for Large Datasets ✔ Robust Error Handling & Validation ✔ Clean, Well-Commented Code ✔ Change Log & Test Scenarios ✔ 100% Client Satisfaction Focused Looking forward to collaborating with you! Regards, Naresh
$300 AUD in 1 day
6.2
6.2

I am an Excel & VBA Automation Expert with an MBA and 10+ years of experience delivering smart solutions to global clients (eg. Decathlon, E&Y, Schindler). I’ve successfully completed 100+ projects (4.9★ rating), helping businesses save time, reduce errors, and boost efficiency. I have previously created many excel and VBA based automtion tool for finance industry. Please have a look at my portfolio for details on my experience- https://www.freelancer.in/u/bhupendrayadav I can deliver a fast, accurate, and customized solution for your requirements. Let’s chat and discuss your project—I can start right away. Looking forward to working with you!
$250 AUD in 3 days
5.9
5.9

Hi, I can optimize your automated rostering workbook, fix the calculation logic, and expand your import/export module. I have extensive experience optimizing heavy Excel/VBA systems for speed and building seamless integrations with JSON and Power Query. I will audit and refactor your calculation logic to resolve inaccuracies, integrate your new business rules, and optimize execution time for fast performance across 2,000+ rows. Additionally, I will expand the import/export pipeline to handle CSV, your payroll XLSX template, and clean JSON exports for Power BI with robust error handling. I’ll deliver the updated, fully commented workbook alongside a clean changelog and test sheet. Ready to review your existing structure and get started! Best Regards, Virendra
$250 AUD in 7 days
6.2
6.2

The need for enhancing calculation logic and optimizing performance in your Excel rostering workbook is clear, especially with issues affecting accuracy and execution speed. I would refine the existing formulas and VBA, ensuring that every shift, allowance, and overtime rule reconciles accurately while introducing the new business rules you've identified. Furthermore, I'll optimize your code to enhance processing speed, specifically targeting the performance on your ~2,000 rows roster. My skills in Excel/VBA optimization and experience in integrating Excel with JSON will ensure a clean and efficient solution. I have a 4.9-star rating across 200 client reviews and have completed 220 projects. Could you provide more details about the specific edge-case rules you need implemented?
$660 AUD in 10 days
5.5
5.5

Hi there, We will refine the Excel rostering workbook so shift, allowance, and overtime calculations reconcile correctly, while also improving VBA/formula performance for the ~2,000-row file. We will add reliable CSV, payroll XLSX, and JSON import-export routines, plus a clear change log and test sheet covering key scenarios. We work carefully with Excel VBA, macros, and data handling, and we have supported public Freelancer review history covering AI adoption, data management and analytical engagements. This first workstream is limited to data review, quantitative analysis and prioritised findings for Excel Rostering Program Enhancements. Broader implementation would be scoped separately on Freelancer. Best Regards, 8veer
$3,000 AUD in 10 days
5.7
5.7

Hi, I am an Excel VBA developer with 8 years of experience in software development. I am familiar with Excel, VBA, Visual Basic, Excel Macros, Power Query, JSON, CSV/XLSX integration, data analysis, and Power BI. I can audit and correct the existing rostering calculations, add the missing business rules, optimise formulas and VBA for faster processing, and extend the import/export module for payroll XLSX and Power BI JSON output. I will provide commented updates, a change log, and a test sheet showing the corrected results. I'm an individual freelancer and can work in any time zone you prefer. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile
$250 AUD in 7 days
5.7
5.7

Hello Sir, Nice to meet you My approach: first audit the existing formulas/VBA against your actual shift, allowance and overtime rules to isolate where the reconciliation breaks, then code the missing edge cases explicitly with test cases attached so they don't regress silently. Performance work follows — usually array formulas replacing volatile cell-by-cell calculations, and VBA loops rewritten to avoid repeated worksheet reads, which is what causes the slowdown at ~2,000 rows. Import/export: CSV stays as-is, payroll XLSX template mapped field-for-field to your existing format, and JSON export structured for Power BI consumption. All three get proper error handling — malformed input reported clearly, not silently dropped. Change log and before/after test sheet included so you can verify every fix. I have worked here with more than 130+ clients. Available immediately.
$250 AUD in 2 days
5.3
5.3

Good day! We have strong experience working with production-grade Excel workbooks involving complex formulas, VBA automation, Power Query, and large datasets. We can refine your existing rostering logic so shifts, allowances, overtime, and edge-case rules calculate and reconcile accurately without disrupting the current file structure. We can also refactor the VBA/formulas to remove unnecessary processing and improve performance across your ~2,000-row roster. For the integration layer, we can expand the existing CSV handling to support your payroll XLSX template and Power BI-ready JSON output, with robust validation and clear error handling instead of silent failures. Testing will cover key scenarios and before/after calculations, with a concise change log and test sheet documenting the important updates. We’ll keep the code clearly commented so future maintenance and business-rule changes remain straightforward. We’re ready to work within your existing workbook and move forward with a faster, more reliable rostering system.
$500 AUD in 7 days
5.4
5.4

Hello, I can work directly inside your existing rostering workbook and focus on accuracy first, then performance. My approach would be: * Audit the current formulas, VBA and/or Power Query to identify incorrect totals and performance bottlenecks. * Map every shift, allowance and overtime rule against your expected results. * Add the missing edge-case/business rules without disrupting existing workflows. * Refactor slow VBA/formula logic using techniques such as array-based processing, reduced worksheet reads/writes, controlled calculation/events, and efficient lookups. * Extend the import/export layer for **CSV, your payroll XLSX template, and JSON for Power BI**. * Add validation and clear error handling so malformed or incomplete data produces useful messages instead of silent failures. * Test against a representative ~2,000-row roster and compare before/after results. * Provide a change log and test sheet documenting the important scenarios. I’ll keep the work within the existing workbook structure wherever practical and clearly comment any VBA or helper modules introduced. Once I review the workbook and business-rule examples, I can identify the exact calculation issues, estimate the work, and provide a focused delivery plan.
$500 AUD in 7 days
5.2
5.2

Hello, I can help you enhance your Rostering program, based on your requirements. I am a VBA Developer with extensive experience in task automation in Excel, and I can quickly and easily deliver the results you need. Please feel free to contact me to discuss your project in more detail. Thanks a lot. Best regards, Emilia
$300 AUD in 7 days
5.5
5.5

Hi there, this is a strong match for an Excel/VBA enhancement bid. I’d update the existing workbook to (1) correct the current shift/allowance/overtime reconciliation, including the missing edge-case rules, and (2) restore “instant” performance on ~2,000 rows by refactoring formulas/macros and applying VBA speed optimizations (minimizing sheet reads/writes, avoiding volatile recalcs where possible, and consolidating logic). For the import/export side, I’ll extend the module beyond basic CSV to reliably parse/generate: your payroll XLSX template and a JSON summary for Power BI, with explicit validations and user-visible, non-silent error handling. Deliverables will include a concise change log plus a test sheet that captures before/after results for key scenarios, while keeping all work inside the current file structure and adding clear code comments for future tweaks. Looking forward to supporting a stable, faster roster workflow.
$250 AUD in 6 days
5.0
5.0

Hello, I’d be happy to optimize and extend your existing Excel rostering system. I have extensive experience in advanced Excel, VBA, Power Query, formula optimization, automation, and data integration. I’ve worked on complex roster and payroll-related Excel systems where accuracy, performance, and reliable automation are critical. I can: * Audit and correct the existing shift, allowance, overtime, and calculation logic. * Implement the new business rules, including edge cases. * Refactor VBA/formulas to improve performance on 2,000+ rows and eliminate unnecessary processing. * Expand the import/export functionality to support CSV, XLSX, and JSON. * Add robust validation and error handling so failed imports/exports are clearly reported. * Keep the existing workbook structure intact wherever possible. * Provide well-commented code, a change log, and a dedicated test sheet showing before/after results for key scenarios. I have also worked extensively with Excel-to-JSON workflows and Power BI data preparation, so the JSON output can be structured cleanly for downstream reporting. I’m ready to review the existing workbook and business rules and start immediately. Best regards.
$300 AUD in 5 days
5.0
5.0

With extensive experience in Excel and Excel Macros, I am fully equipped to enhance your rostering program. I understand the urgency of ensuring every shift allocation, allowance and overtime rule is accurately calculated - criticality you require. My ability to analyze, debug and optimize formulas/VBA will not only resolve any current issues but revamp the overall processing speed. My background in Computer Science means that I am well-versed with leveraging existing structures and commenting codes for easy future tweaks, exactly how you require. Additionally, my proficient skills in Excel-related tasks do not only end in formula debugging but encompass expanding import/export capabilities too, something you need support with. My experience integrating Excel with various file formats, including JSON, will come in handy as I implement these two new formats (XLSX template and JSON summary). To conclude, your project demands someone familiar with advanced Excel optimization techniques and integration with JSON like me. With a dedicated focus on high-quality deliverables, fast turnarounds, comprehensive communication and strong attention to detail - choosing me guarantees that the altered workbook will be robust in all respects - efficient calculations on a fast-speed platform interfacing harmoniously with different file formats. Let's leverage my skills together to take your rostering system to unparalleled efficiency!
$350 AUD in 3 days
5.0
5.0

Hello, I got that you need your production Excel rostering system corrected for inaccurate shift, allowance and overtime calculations, optimized for ~2,000 rows, and expanded to reliably import/export CSV, payroll XLSX and Power BI-ready JSON. This is what I can help you with, let's chat. My approach is to audit the existing formulas and VBA, isolate the edge-case rules causing reconciliation errors, and refactor the calculation engine using efficient VBA/array processing where appropriate. I’ll benchmark the workbook before and after optimization, then build validated CSV, XLSX and JSON parsing/generation with explicit error handling so failures are visible rather than silently ignored. New business rules will be covered by a dedicated test matrix to verify every key scenario against expected results while keeping your existing workbook structure intact. As final deliverables you will receive the corrected workbook, extended calculation logic, optimized VBA/Power Query, three-format import/export module, performance improvements for ~2,000 rows, commented code, change log, and before/after test sheet. One thing I'd like to confirm before we start: can you provide the current workbook and the exact new business rules? Let's review the existing logic and I can identify the highest-impact fixes first. Best Regards, Imran
$250 AUD in 2 days
4.7
4.7

A 2,000-row roster grinding to a crawl is usually Excel begging for better math, not more hardware. I can rework the shift/overtime logic, fix the reconciliation gaps, and add the missing edge-case rules, then optimize for speed via Power Query/formula refactoring. As Reporting Analyst at Xclusive Trading and through freelance data work, I've built and debugged formula-heavy reporting workbooks and worked with Power Query, DAX, SQL, and Python for structured data exchange — solid ground for CSV/XLSX/JSON parsing with proper error handling. Will deliver commented code plus a change log and before/after test sheet. Shafi
$250 AUD in 2 days
5.0
5.0

Hi, I can help improve your Excel rostering workbook and VBA logic. I have strong experience with Excel, VBA, formulas, Power Query, and data processing, and I can work within your existing structure to correct calculation issues, add the new business rules, and optimize performance for the 2,000 row roster. I can also work on CSV, XLSX, and JSON import/export workflows with proper error handling and clear documentation. I’ll test the key scenarios thoroughly and provide a change log and test sheet so the results are easy to verify.
$400 AUD in 4 days
4.9
4.9

Rockhampton, Australia
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