Loop earplugs

Spreadsheet Migration Consultant (Excel → Google Sheets)

Antwerp, BE; Amsterdam, NL Full Time

We are Loop 

Loop Earplugs is reinventing how people experience the world by enabling them to live life at their own volume. 2024 was a pivotal year at Loop – we hit 14,000,000 earplugs sold, were named ‘The Best Earplugs for Concerts’ by The New York Times, and expanded our product offering to a complete range of solutions for day and night. Oh – and not to mention making history as the first company to win Deloitte’s Fast 50 Belgium twice. 

But this is just the beginning. As we continue to develop disruptive products, we’re constantly on the lookout for the next big idea - and building a team who can make it happen.

Being a Looper means making a difference. Whatever your role, this is your stage to make a real impact and bring your ideas to life. Better yet, you’ll join a fast-growing, global team of 250+ people who are passionate, down-to-earth and eager to tackle challenges together. 

Freelance Spreadsheet Migration Consultant


Start: Immediate
Duration of assignment: max. 2 weeks

About the Role

We’re looking for a highly technical consultant to lead the migration of complex, business-critical spreadsheets from Excel to Google Sheets.

This is not a lift-and-shift exercise.

Many of our spreadsheets contain advanced formulas, macros, and large-scale data models. Some should be migrated, some rebuilt, and some left untouched. Your role is to figure out which is which—and execute accordingly.

If your experience is limited to Google Workspace admin, file transfers, or basic Sheets usage, this role is not a fit.


What You’ll Do

1. Assess & Deconstruct Existing Spreadsheets

  • Audit a wide range of Excel files (including macro-heavy and large-scale models)

  • Classify spreadsheet complexity (Low / Medium / High)

  • Identify structural, performance, and scalability issues

  • Determine migration feasibility:

    • Convert

    • Rebuild

    • Keep in Excel

2. Lead Migration Strategy

  • Define a clear migration approach across the organization

  • Estimate effort and risk per spreadsheet

  • Recommend alternative solutions where Sheets is not the right tool

  • Design scalable spreadsheet architectures in Google Sheets

3. Execute Pilot Conversions

  • Convert 3–10 representative spreadsheets

  • Replace VBA/macros with Apps Script where viable

  • Rebuild models when direct conversion is not feasible

  • Validate performance and usability post-migration

4. Build for Scale

  • Optimize spreadsheets for performance (large datasets, calculation efficiency)

  • Integrate external data sources (APIs, databases, etc.)

  • Establish best practices for future spreadsheet development


What You Bring

Core Expertise (Non-Negotiable)

  • Advanced Excel engineering:

    • Complex formulas, pivot tables, Solver

    • VBA/macros (you’ve written and debugged them, not just used them)

    • Large-scale spreadsheet modeling

    • Performance optimization

  • Advanced Google Sheets:

    • Array formulas, QUERY, advanced logic

    • Google Apps Script (macro replacement)

    • Deep understanding of Sheets limitations and workarounds

  • Spreadsheet architecture & data workflows:

    • Structuring models for scalability and maintainability

    • Understanding when spreadsheets break—and why

Experience

  • Proven experience migrating complex Excel spreadsheets to Google Sheets

  • Hands-on experience converting VBA → Apps Script

  • Experience analyzing spreadsheet performance and redesigning structure

Strong plus:

  • Experience working with engineering or hardware teams

  • Background in data analysis or financial modeling

  • Experience with Python, SQL, BigQuery, or API-based data pipelines


Technical Skills Checklist

You should be comfortable working with:

Excel

  • VBA / macros

  • Pivot tables

  • Power Query

  • Solver

  • Complex nested formulas

  • Large datasets (>50k rows)

Google Sheets

  • Apps Script

  • Array formulas

  • QUERY function

  • Performance optimization

  • External integrations

Automation / Data

  • REST APIs

  • Python (nice to have)

  • Data pipelines (nice to have)


What Good Looks Like

By the end of the engagement, you will have delivered:

  • Spreadsheet inventory
    Full overview of analyzed files

  • Complexity classification
    Clear segmentation (Low / Medium / High)

  • Migration feasibility mapping
    Convert vs Rebuild vs Keep

  • Effort estimates
    Time and complexity per file

  • Migration roadmap
    Clear, executable plan across all spreadsheets


Engagement Scope

Phase 1 — Assessment

  • Analyze sample spreadsheets

  • Classify complexity

  • Evaluate feasibility

Phase 2 — Pilot

  • Convert selected spreadsheets

  • Rebuild where needed

  • Test performance and usability

Phase 3 — Rollout Plan

  • Define what gets migrated, rebuilt, or retained

  • Provide scalable recommendations


Don’t Apply If…

  • Your experience is limited to Google Workspace admin or IT migrations

  • You’ve never worked with VBA or complex spreadsheet models

  • You’ve only used spreadsheets, not engineered them


Why This Role Matters

Spreadsheets are critical to how we operate. Poor migration decisions will break workflows, slow teams down, and create long-term technical debt.

We’re looking for someone who can think like an engineer, not just execute like a technician.

Why join us? 

  • Our culture? We’re all about enabling growth by giving our team full autonomy to manage their own projects, be a thought leader, and truly make an impact on the company. 

  • We take care of our people. So, we pay them what they’re worth. We benchmark each salary extensively against local market data.

  • Flexibility: For us, hybrid and flexible working is all about trust. And we trust you to get on with your job, so there’ll be no micromanaging or peeking over your shoulder from us.

  • Benefits: Our benefits are all aimed towards looking after your health, and enabling you to live life to the fullest. So everything from health insurance and retirement savings to the latest tools is covered.

 
Come as you are, our equal opportunities employer statement 

Loop is an equal opportunities employer. We invest in diversity, ensure equality and encourage expression. We have a zero-tolerance policy for harassment, bias or discrimination towards applicants and employees. 

Live life at your volume. 🎶  We'll take care of your ears.