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Martin LostakML
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Martin Lostak

@martinlostak

Freelance Senior Web Analyst specializing in GA4 and GTM, making website measurement reliable.

Czechia
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As a freelance Senior Web Analyst, I help companies make sense of website and customer behaviour data. I implement GA4 from scratch and audit existing setups, with a focus on clean structure and tracking people can rely on.

At Creative Dock, I worked across testing and performance, helping projects scale through Google Ads, Facebook Ads, analytics, and reporting. Earlier, at Kreditech, I worked on online channel strategy and performance, including customer acquisition and retention.

My background also includes freelance performance marketing for clients in fintech, e-health, and e-commerce. Because I’ve run campaigns as well as worked on measurement, I can help investigate what happens between an ad click and a conversion using tools such as Google Tag Manager, server-side tracking, and Meta CAPI.

Experience

Work history, roles, and key accomplishments

FR
Current

Freelance Senior Web Analyst

Freelance

Apr 2023 - Present (3 years 7 months)

I specialise in:
- GA4 implementation from scratch and audits of existing setups
- Google Tag Manager — clean container structure, proper tagging, testing
- Marketing pixels and Enhanced Conversions (Meta, Google, Sklik, TikTok, etc.)
- Server-side tracking and Meta CAPI
- Consent Mode v2
- E-commerce tracking in GA4

ML

Freelance Performance and Digital marketing specialist

Martin Lostak

Nov 2017 - May 2026 (8 years 6 months)

Helping startups and online companies grow, evaluate and understand their online potential.

Main focus: Google Ads, Facebook Ads, Analytics and Reporting.

Creative Dock logoCD

Digital Marketing Manager

Creative Dock

Sep 2019 - Dec 2021 (2 years 3 months)

Creative Dock creates new ways how to generate value and revenue through digital transformation. Simply put - builds digital startups for big companies looking for digital innovation.

I had many roles and many responsibilities, mostly:

Head of Testing - creating the testing process and making sure all teams and projects follow the methodology so testing results are actionable before moving with

KS

Head of Sales and Marketing

Kreditech Česká republika s.r.o.

Jan 2016 - Oct 2017 (1 year 9 months)

- Leading a team of senior marketing specialists (SEM, Affiliate, Display, RTB)
- Leading and coordinating international affiliate team for the whole Kreditech group (CZ, ES, PL, RU, MX)
- Coordinating other channel activities with external providers or internal teams (CRM,
Call Center, SMS, PR)
- All activities strictly based on improving performance and efficiency of the channels
- Proven track

Kreditech Holding SSL GmbH logoKG

Senior Marketing Manager for Czech Republic

Kreditech Holding SSL GmbH

Oct 2014 - Oct 2017 (3 years)

- responsible for all online channels in CZ market for Kredito24.cz and Zaimo.cz
- primary focused on Affiliates, SEA, Email marketing, Display, RTB
- strategy definition based on defined KPIs and budgets
- responsible for sales performance with focus on new customer growth

Vykupto.cz logoVY

Marketing Director

Vykupto.cz

Sep 2013 - Sep 2014 (1 year)

- supervising all departments serving as touch points with user / customer base (marketing communication, on-line marketing, public relations, customer support, web development, internal
communication, graphic design, copywriting) – cca 30 people
- implementing marketing strategy with focus on ROI and performance
- KPIs and strategy definiton
- customer research and analysis as a base for consum

Vykupto.cz logoVY

Project Manager

Vykupto.cz

Feb 2012 - Sep 2013 (1 year 7 months)

- managing marketing projects across all marketing channels
- on-line marketing (e-mail marketing, SEA, display banners, affiliate marketing)
- managing ATL campaigns
- public relations (communication with media, coworking with PR agency, monitoring)
- internal communication
- CSR projects (Konto Bariéry, SOS dětské vesničky)
- B2B projects (maitaining relations with suppliers)
- Salesroom brandin

Volksbank CZ, a.s. logoVA

Marketing Officer

Volksbank CZ, a.s.

Aug 2010 - Jan 2012 (1 year 5 months)

- managing ATL and BTL campaigns
- printed materials production to support needs of external channels and branches
- internal communication: intranet, newsletter
- web applications
- coordinating new web presentation project
- supporting team members in other areas: Public Relations, Event Management

AG

Account Manager

Art Gate

Jun 2010 - Oct 2010 (4 months)

Worked as Account Manager at Art Gate.

RL

Affiliate Marketing Specialist

RebateGiant.com LLC

Apr 2009 - May 2010 (1 year 1 month)

- Account Representative for leading (500k+ unique visitors / month) US server focused on providing on-line shopping discounts
- searching for new partners and negotiating terms, communication with current partners and maintaining relations (leading servers like Walmart, Ebay, Amazon)
- ads administration for servers and applications
- evaluating campaigns, reporting

MB

Marketing Specialist

Möbelix

Nov 2007 - Apr 2009 (1 year 5 months)

DTP + graphic design, Ads production (radio, billboards etc.), Coordinating externists

Education

Degrees, certifications, and relevant coursework

GO

Google

Google Analytics Certification

Oct 2022 · Expired Oct 2023

DO

DoubleClick

DoubleClick Campaign Manager Fundamentals

Jun 2015

Masarykova univerzita logoMU

Masarykova univerzita

Bc., Medial Studies and Journalism + Environmental Studies

2004 - 2007

Study specialization: Digital Media (design, film making, post-production, web 2.0, social media).

I have left the school after 2 semesters in Mgr. cycle due to time consuming work.

Tech stack

Software and tools used professionally

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