Marek Sęk-Senior Software Engineer & AI Consultant
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Experience
AI Consultant / Project Manager
Stealth Project (NDA)
- Working under NDA on a confidential product initiative, blending AI consulting with hands-on project management.
- Details withheld per client confidentiality agreement; happy to discuss scope and impact verbally on request.
Senior Software Developer
intive
- Developed connected-TV applications using Roku and BrightScript.
Skills: Roku, BrightScript
Co-Founder & CTO
Mosaic Meet
- Co-founded and led engineering for a video-chat socializing platform connecting travelers across cultures; grew from a part-time project into a full-time role as the company scaled.
- Backed by the Hong Kong Science and Technology Park, one of the region's largest incubators.
- Owned technical architecture and product delivery as the founding team grew.
Skills: JavaScript, React.js, and 9 more
Senior Frontend Developer / Team Lead
WorldRemit
- Led frontend development and mentored engineers on a consumer-facing remittance product.
Skills: JavaScript, React.js, and 6 more
Senior Frontend Developer & Frontend Developer
Grand Parade
- Frontend Developer (Jun 2017 – Jul 2018), promoted to Senior Frontend Developer (Aug 2018 – Jan 2019).
Skills: JavaScript, React.js, and 6 more
Frontend Developer
IG
Skills: JavaScript, PHP, and 5 more
Frontend Developer
International Coupons
Skills: JavaScript, Web Development, and 4 more
Full Stack Developer
Binary Minds
Skills: JavaScript, PHP, and 4 more
Advertising Specialist
WebReklama Kraków
Industry Experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Professional Services, Tourism, Banking and Finance, Media and Entertainment, and Advertising.
Business Area Experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Project Management, and Marketing.
Summary
Full-stack software engineer with over a decade of experience spanning frontend leadership, connected-TV development, and startup engineering leadership as a Co-Founder & CTO. Currently working as an AI Consultant / Project Manager on a confidential product initiative, combining AI-assisted development practices with hands-on delivery ownership. Comfortable owning a product end to end — from architecture and infrastructure to shipping features solo or leading a team.
Skills
- Frontend: Javascript, Typescript, React.Js, Next.Js
- Backend: Nestjs, Php, Postgresql, Prisma
- Platforms: Roku / Brightscript, Railway
- Ai-Assisted Dev: Claude Code, Spec-Driven Development Workflows
- Infrastructure: Linux, Proxmox Homelab, Networking
- Other Technical: Cad (Fusion 360), Embedded/Iot (Esp32, Arduino), Drone Photogrammetry (Opendronemap)
Languages
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Global Experience
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Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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