Alexandra Jermolcsenko - AI Data Trainer

Q: Where is Alexandra based?

Alexandra is based in Mislata, Spain .

Q: What languages does Alexandra speak?

Alexandra speaks the following languages: Russian (Native), Ukrainian (Native), English (Advanced), Spanish (Advanced), Dutch (Advanced) .

Q: How many years of experience does Alexandra have?

Alexandra has at least 14 years of experience. During this time, Alexandra has worked in at least 8 different roles and for 9 different companies . The average length of individual experience is 2 years and 7 months . Note that Alexandra may not have shared all experience and actually has more experience.

Q: What is Alexandra's latest experience?

Alexandra's most recent position is AI Data Trainer at Invisible Technologies .

Q: What companies has Alexandra worked for in recent years?

In recent years, Alexandra has worked for Invisible Technologies , Mercor , Yource Spain , Intero Integrity Services B.V. , and Dutch Protein & Services B.V. .

Q: Which industries is Alexandra most experienced in?

Alexandra is most experienced in industries like Professional Services , Education , and Food and Beverage . Alexandra also has some experience in Transportation and Logistics , Information Technology (IT) , and Banking and Finance .

Q: Which business areas is Alexandra most experienced in?

Alexandra is most experienced in business areas like Customer Service , Quality Assurance (QA) , and Operations . Alexandra also has some experience in Logistics , Legal and Compliance , and Sales .

Q: Which industries has Alexandra worked in recently?

Alexandra has recently worked in industries like Food and Beverage , Professional Services , and Information Technology (IT) .

Q: Which business areas has Alexandra worked in recently?

Alexandra has recently worked in business areas like Quality Assurance (QA) , Customer Service , and Logistics .

Recommended expert

Mislata, Spain

Experience

Jan 2025 - Present

1 year 2 months

AI Data Trainer

Invisible Technologies

Evaluating AI-generated outputs for accuracy, relevance and quality
Providing feedback to improve model performance
Performing quality assurance checks to ensure data accuracy and compliance with project standards
Performed quality checks on peer work to ensure consistency and reduce rework
Acted as point of reference between transcribers and project managers, resolving tickets and clarifying guidelines
Adjudicated ambiguous cases and documented edge cases to align teams on updates
Contributed examples and quick-reference notes to improve guideline clarity
Conducted tests and evaluations to assess new annotators’ readiness and alignment with guidelines

Jan 2025 - Present

1 year 2 months

AI Translator & Reviewer

Mercor

Review and validate AI-generated Russian translations for fluency and accuracy
Identify unnatural or awkward phrasing and provide more idiomatic alternatives
Ensure language reflects contemporary usage and norms in Russia
Spot and correct mistranslations, ambiguity, or tone issues
Provide structured feedback on linguistic quality and localization
Work independently and asynchronously to meet deadlines while improving AI model performance

Jan 2025 - Present

1 year 2 months

Valencia, Spain

Client Service Representative

Yource Spain

Handling customer inquiries
Assisting with online banking and payment transactions
Identifying sales opportunities and referring to advisors
Processing customer requests administratively
Working in accordance with guidelines

Jan 2023 - Dec 2025

3 years

Tricht, Netherlands

Receptionist & Operations Assistant

Intero Integrity Services B.V.

Handling phone calls
Receiving and assisting visitors
Answering questions and scheduling appointments
Maintaining a professional reception area
Keeping the engineers' team's trainings/certifications up to date
Processing visa applications
Booking flights, hotels, and rental cars

Jan 2019 - Dec 2023

5 years

Tiel, Netherlands

Quality Lab & QA Administrative Assistant

Dutch Protein & Services B.V.

Collecting and registering samples
Conducting tests using various lab equipment
Recording and tracking test results
Operating and maintaining laboratory instruments
Consulting with colleagues about abnormal results and finding solutions
Training and mentoring new staff
Requesting, processing, and tracking certificates (analysis, allergens, etc.)
Communicating with suppliers about orders
Monitoring and recording quarterly processed raw materials, deviations, and corrective actions

Jan 2018 - Dec 2019

2 years

Tiel, Netherlands

Administrative Assistant

Z&Z Logistics

Scheduling appointments
Processing incoming emails and mail
Managing client data
Internal and external communication

Jan 2017 - Dec 2017

1 year

Mukachevo, Ukraine

Online English Teacher

English Discussions

Teaching English to children and adults
Leading group discussion clubs

Jan 2014 - Dec 2016

3 years

Mukachevo, Ukraine

English Teacher

Polyglot Learning Center

Teaching English to children and adults
Translating fictional texts and legal documents

Jan 2012 - Dec 2013

2 years

Mukachevo, Ukraine

English Teacher

Globe Language School

Teaching English to children and adults

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Professional Services (6 years), Education (6 years), Food and Beverage (5 years), Transportation (2 years), Information Technology (1 year), and Banking and Finance (1 year).

Professional Services

Education

Food and Beverage

Transportation

Information Technology

Banking and Finance

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Customer Service (8 years), Quality Assurance (6 years), Operations (5 years), Logistics (3 years), Legal (3 years), and Sales (1 year).

Customer Service

Quality Assurance

Operations

Logistics

Legal

Sales

Summary

As a Data Annotator, I create and review LLM training data to safety/compliance labeling and factuality checks with corrections. I thrive under tight deadlines and SLAs, adapt quickly to evolving protocols and guidelines, and work smoothly in fully remote, asynchronous teams across time zones. I often serve as a QA reviewer and liaison, resolving ambiguity, triaging tickets, and aligning PMs and raters to ensure consistent outputs.

Specialist in advanced multilingual translation projects and linguistic evaluation of artificial intelligence models, focused on optimizing translation quality, semantic disambiguation, terminological accuracy, and culturally and contextually appropriate localization, with a strong emphasis on the reliability, coherence, and functional precision of AI-generated outputs.

Skills

Microsoft Office Suite (Word, Excel, Powerpoint, Access, Outlook)

Languages

Russian

Native

Ukrainian

Native

English

Advanced

Spanish

Advanced

Dutch

Advanced

Education

Sep 2008 - Jun 2014

National Linguistic University, Kyiv

Master’s degree in Translation / Interpretation & English Philology · Translation / Interpretation & English Philology · Kyiv, Ukraine

Profile

Created

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Alexandra based?

Alexandra is based in Mislata, Spain.

What languages does Alexandra speak?

Alexandra speaks the following languages: Russian (Native), Ukrainian (Native), English (Advanced), Spanish (Advanced), Dutch (Advanced).

How many years of experience does Alexandra have?

Alexandra has at least 14 years of experience. During this time, Alexandra has worked in at least 8 different roles and for 9 different companies. The average length of individual experience is 2 years and 7 months. Note that Alexandra may not have shared all experience and actually has more experience.

What roles would Alexandra be best suited for?

Based on recent experience, Alexandra would be well-suited for roles such as: AI Data Trainer, AI Translator & Reviewer, Client Service Representative.

What is Alexandra's latest experience?

Alexandra's most recent position is AI Data Trainer at Invisible Technologies.

What companies has Alexandra worked for in recent years?

In recent years, Alexandra has worked for Invisible Technologies, Mercor, Yource Spain, Intero Integrity Services B.V., and Dutch Protein & Services B.V..

Which industries is Alexandra most experienced in?

Alexandra is most experienced in industries like Professional Services, Education, and Food and Beverage. Alexandra also has some experience in Transportation and Logistics, Information Technology (IT), and Banking and Finance.

Which business areas is Alexandra most experienced in?

Alexandra is most experienced in business areas like Customer Service, Quality Assurance (QA), and Operations. Alexandra also has some experience in Logistics, Legal and Compliance, and Sales.

Which industries has Alexandra worked in recently?

Alexandra has recently worked in industries like Food and Beverage, Professional Services, and Information Technology (IT).

Which business areas has Alexandra worked in recently?

Alexandra has recently worked in business areas like Quality Assurance (QA), Customer Service, and Logistics.

What is Alexandra's education?

Alexandra holds a Master in Translation / Interpretation & English Philology from National Linguistic University, Kyiv.

What is the availability of Alexandra?

Alexandra is immediately available part-time for suitable projects.

What is the rate of Alexandra?

Alexandra's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.