Lena Sesardic

Etsy Store Owner & Artist

Baddie Women's Circle

A bi-weekly virtual circle for the women who are letting go of a life, relationship, career or version of themselves that “makes sense” on paper for something that’s unorthodox but feels fully aligned.

Founder & Facilitator

The Authentic Advantage

AI & ChatGPT Business Coach

Tulum Girlies Group 👯‍♀️

Founder, Community Manager & In-Person Events Host

TikTok

I create funny & educational TikTok videos about the "casual" side of LinkedIn (handle: @contently_lena.)

My TikTok wins:
- Went from 0 to 100k likes and 13k followers in 14 days
- 15M+ views to date on TikTok
-50+ viral videos
-2000+ downloads of my free LinkedIn Profile Scorecard in 2 months from TikTok
- Collaboration with LinkedIn Marketing Partner, Transmission agency


Want me to create an engaging TikTok video for your brand? Email me at hello[at]lenasesardic[dot]com. 💌

Content Creator & Influencer

GrowthMentor

I'm a GrowthMentor helping product managers, marketers & founders with product management, content marketing, LinkedIn marketing, customer discovery & idea validation.

𝗖𝗵𝗲𝗰𝗸 𝗼𝘂𝘁 𝗺𝘆 𝗚𝗿𝗼𝘄𝘁𝗵𝗠𝗲𝗻𝘁𝗼𝗿 𝗽𝗿𝗼𝗳𝗶𝗹𝗲 & 𝗯𝗼𝗼𝗸 𝗮 𝗳𝗿𝗲𝗲 𝗰𝗮𝗹𝗹 𝘄𝗶𝘁𝗵 𝗺𝗲 𝗶𝗳 𝘆𝗼𝘂 𝘁𝗵𝗶𝗻𝗸 𝗜 𝗰𝗮𝗻 𝗯𝗲 𝗵𝗲𝗹𝗽𝗳𝘂𝗹. 💜

Growth Mentor

Medium

I contribute my writing on lenasesardic.com to two Medium publications:

Start it Up - the largest Medium publication in the world
Product Coalition - the largest Medium publication for product management

I'm also part of the Medium Partner Program.

Contributing Writer

Aviso Wealth

Managing the new NEI Investments website to make sure all content is up-to-date, on brand, and driving key metrics.

Using my PM mindset to run experiments and find new growth opportunities for the new website.

Senior Content Publisher

Product Owner

Transparent Media Studio

Product management can be a little nebulous if you've never been a PM before. Which is why tech companies hire a PM veteran like me to help them write about the craft in a credible way that converts leads to clients.

With 4+ years experience in the industry, I know the PM principles & concepts like the back of my hand and am familiar with the key thought leaders and schools of thought in the space.

You can hire me to do the following:

◆ SEO-optimized blog posts
◆ Newsletters
◆ Emails
◆ Ebooks
◆ Social media posts
◆ White papers

I also offer ghostwriting services for executives in the PM space.

If you want to work with me, send me an email at hello@lenasesardic.com 💌

--

My clients have included companies like Userpilot.com and Arc.dev. You can check out my writing samples attached here.

Freelance Writer / Ghostwriter

-Mentored/advised venture teams in idea validation, customer discovery and mindset.
-Mentored/advised aspiring product managers in how to break into product management.
-Collaborated with individuals & teams on various startup-related projects or side projects.

Mentor, Advisor & Collaborator

Be your unapologetic self & create epic LinkedIn content that converts 😈 //They call me "the LinkedIn Therapist"

Ready to build your Second Brain? 🧠

The Second Brain Project is a 4-week live cohort to help coaches, creatives, and business owners build a high-functioning network of GPTs that automate their workflows, multiply their time & use AI the way it was meant to be used: as your second brain.

By the end of the 4 weeks, you’ll walk away with:
✅ 5–15 GPTs that think like you
✅ A plug-and-play GPT Playground to use instantly
✅ Systems that actually run without your brain being the bottleneck
✅ Confidence to keep building GPTs that save time, increase capacity, and sound just like you


📌 WHAT'S INCLUDED:

- 4 x live weekly trainings (with replays)
- GPT Builder Pro (your personal GPT-building assistant)
- Playground of plug-and-play GPTs (e.g. Sales Call Decoder, Content Sculptor)
- My 6-Step GPT Your Brain Method
- Second Brain Architecture Template (Google Sheet + Notion)
- Bonus GPT Naming Guide

⏰ FAST PASS BONUS:
If you sign up within 48 hours (by Thursday at 10am PT / 1pm ET / 7pm CEST), you’ll also get:

🔓 Early Access to the GPT Library (April 28)
📞 Bonus Live Q&A Call with Me (May 6)


You're already paying $20/month for ChatGPT Plus, but you're using 5% of what it's actually capable of.

This isn’t just about ChatGPT. This is about you building a real system that:

- Thinks like you
- Speaks in your voice
- Handles work you don’t want to do

A system that scales your business & gives you your brain back.

Join The Second Brain Project: https://natural-temple-f15.notion.site/The-Second-Brain-Project-1d9921c15bdc80d09cb8ef9e0607f1fa?pvs=4

Founder & LinkedIn "Baddie" Business Coach 😈

I can help you confidently sell your 4- or 5- figure offers on LinkedIn and get high-calibre clients so you can generate more revenue for your biz, raise your prices and work less!

Independent Researcher

University of Zagreb, Faculty of Information Science

University Lecturer

The University of Hong Kong

West Island School

School Librarian

Kowloon Junior School

St Ann's Hospital 

Medical Librarian

National and University Library in Zagreb

Information Specialist

Experienced Lecturer with a demonstrated history of working in the libraries industry and academic teaching. Skilled in Lecturing, Educational Technology, and Research. Strong education professional with a Master of Arts (M.A.)in Sociology and Ph. D. in Library and Information Science from the University of Zagreb/Sveuciliste u Zagrebu.

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The Battle

Lena Sesardic

Zvjezdana Dukic

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