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Data Processing Excel Python Testing / QA Website Testing
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Jeyrell T.

@JeyTar

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5,0
5

3,3

3,3

100%

Data Analysis & Automation Expert | Lean Six Sigma

$19 USD / time

s flagg

Costa Rica (11:17 p.m.)

Ble med desember 8, 2020

$19 USD / time

I am a Senior Data & Automation Engineer and Solutions Architect specialized in the Tax and Finance domain, dedicated to transforming high-compliance, manual workflows into scalable, auditable, and 'production-ready' systems. My career is built on a foundation of operational excellence, moving from the 'make it work' layer—using Excel, Power Query, and Power BI to standardize complex data—to architecting full-scale ecosystems within the Microsoft 365 stack (SharePoint, Power Automate, Power Apps). I focus on operationalizing insights through centralized governance, role-based workflows, and rigorous traceability. As technical challenges scale, I transition from low-code to robust engineering. I leverage SQL for data integrity and build advanced automations in Python, specialized in document generation and template-driven reporting. This ensures that every solution is versionable, repeatable, and logically sound. When a bespoke user experience is required, I integrate JavaScript to deliver high-performance internal tools and interactive dashboards. Guided by a Lean Six Sigma (Green Belt) mindset, I apply the DMAIC framework to every project: defining the core problem, measuring performance through KPIs like DSO or SLA, and implementing controls that lock in efficiency gains. My core value is bridging the gap between complex tax requirements and reliable data pipelines, delivering results that are not just functional, but audit-ready. [login to view URL] [login to view URL]

Verifikasjoner

Innen fristen

100 %

Innenfor budsjett

100 %

Akseptrate

100 %

Gjenansettelsesrate

20 %

Portefølje

Portefølje

13812065
13790254
12567547
12361638
12336720
12335549
13812065
13790254
12567547
12361638
12336720
12335549
5.0 · 5 gjennomganger
Anmeldelser
Brukeravatar

Debug Digital Assistant Outer Loop & GUI - 10/02/2026 19:15 EST $250 USD

Exceptional freelancer. A genuine expert in a field crowded with pretenders, he far exceeded the project scope, delivered impeccable work, and produced clear documentation that makes ongoing maintenance simple. He anticipated and solved problems, and added valuable improvements I had not expected. Communication and turnaround were exemplary. Professional, reliable, and brilliant to work with. I could not recommend him more and in the future I would not want to waste my time hiring anyone else.

Chance B.

@ChanceBrownfiel1

s flagg

aurora, United States

20 dager siden

Del

A

Test for Costa Rica (archived) $20 USD

Everything was just fine, it was great to work with Jeyrell again

Anna M.

@AnnaMikheychenko

s flagg

Belgrad, Serbia

ett år siden

Del

N

Creating an expandable table in PowerBi Desktop $22 USD

Jeyrell delivered fast and well.

Lorenz J.

@nan190

s flagg

Bern, Switzerland

ett år siden

Del

Brukeravatar

Resolver taller sobre KNIME $40 USD

Great work and great communication!

Mateo M.

@Mateo237

s flagg

Pereira, Colombia

ett år siden

Del

A

Bank Transfer Testing for Costa Rican Payment Methods (archived) $25 USD

Everything was great! Jeyrell F. has delivered everything on time and the results were provided perfectly. I'll definitely continue working with this freelancer within next projects

Anna M.

@AnnaMikheychenko

s flagg

Belgrad, Serbia

2 år siden

Del

Erfaring

Technology and Finance Process Specialist | Automation | Data Analytics

des., 2024 - nåværende

1 år, 2 måneder

Amway

des., 2024 - Nåværende

1 år, 2 måneder

With a strong background in Lean Six Sigma methodologies, I specialize in transforming manual, time-consuming processes into efficient, automated solutions. My experience includes implementing data-driven strategies that enhance accuracy, streamline workflows, and improve compliance with tax and financial regulations. Key Areas of Expertise: ✅ Alteryx Workflow Maintenance & Optimization ✅ MySQL Database Management & Documentation (DBeaver) ✅ Process Automation & Data Transformation

s flagg

Heredia, Costa Rica

des., 2024 - nåværende

1 år, 2 måneder

Tax Automation Specialist

nov., 2023 - jul., 2024

8 måneder, 1 dag

Kimberly Clark

nov., 2023 - jul., 2024

8 måneder, 1 dag

• Migrated processes to a centralized SharePoint and developed workflows using Power Automate for follow-ups and notifications. • Managed automation projects, including personalized email creation and tax file parameterization for Argentine tax authorities using KNIME. • Applied DMAIC methodology to identify standardizations and process changes before automation, enhancing efficiency. • Supported colleagues with Power Apps and Power Automate.

s flagg

Heredia, Costa Rica

nov., 2023 - jul., 2024

8 måneder, 1 dag

Genpact

mar., 2020 - nov., 2023

3 år, 7 måneder

Senior QA

jan., 2023 - nov., 2023

9 måneder, 30 dager

• Developed and executed process improvement and digital transformation projects. • Led Value Stream Mapping and Problem-Solving Workouts, auditing deployed processes for effectiveness and efficiency. • Migrated reconciliation reports from Excel to Power BI and Dataiku. • Coached and mentored Green Belts, driving quality performance and deploying frameworks to improve process performance.

s flagg

Heredia, Costa Rica

Quality Analyst

sep., 2021 - nov., 2023

2 år, 2 måneder

• Led Lean transformation and process improvement initiatives. • Implemented process improvements and digital solutions using Power BI and Tableau. • Coordinated with functional teams and mentored projects in areas like Record to Report, Invoice to Cash, and Accounts Payable.

s flagg

Heredia, Costa Rica

Tax Analyst

sep., 2020 - sep., 2021

1 år

• Managed VAT returns and taxes on alcoholic beverages. • Led the digital transformation of the tax department, reducing delivery time and enhancing data analysis • Oversaw the review of sales and purchase ledgers for Guatemala and contributed to the continuous improvement team.

s flagg

Heredia, Costa Rica

Business Intelligence Analyst

mar., 2020 - sep., 2020

5 måneder, 30 dager

• Executed process improvements using tools like Alteryx, VBA, Power BI, and Access. Trained and certified department staff in digital tools and methodologies.

s flagg

Heredia, Costa Rica

mar., 2020 - nov., 2023

3 år, 7 måneder

Utdanning

Instituto Tecnológico de Costa Rica

2016 - 2023

7 år

Bachelor of Business Administration (BBA)

s flagg

Costa Rica

2016 - 2023

7 år

Intermediate Technician, Executive for service centers

2014 - 2016

2 år

s flagg

Costa Rica

2014 - 2016

2 år

Kvalifikasjoner

Data Engineer

2025

Brainc México

Issued Jul 2025Issued Jul 2025 Credential ID 624bd0e39df2bf2e436e1588

2025

Greenbelt

2023

Genpact

Greenbelt

2023

Digital Transformation with Generative AI: Optimizing, Innovating, and Boosting Productivity

2024

Tecnológico de Costa Rica

AI

2024

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