Portfolio — 2026

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Real problems. Scalable products. Proven by data. PM since 2012 · AI builder since 2018 · Fractional CPO now.

Fractional CPO · Product Manager · AI Builder

Web · Mobile · Backend · Blockchain · Payments

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01 — Products

Solo Built & Shipped.

Also

Led as PM.

Products I shipped at scale — as the PM driving strategy, roadmap, and execution.

B
Coming soon

Bondai

Acquired

B2B travel marketplace across MENA & KSA — took B2Bondai SaaS from concept to $10M in annual sales. Built subscription tiers, agency onboarding, and hotel/activity API products. Hired and built the product org from scratch: 11-person cross-functional team.

TravelB2BSaaSMarketPlace
Cointral screenshot 1Cointral screenshot 2Cointral screenshot 3

Cointral

Acquired

One of Turkey's first crypto exchanges — launched from zero to live in 4 months, with credit card, cash & PSP on/off-ramps. Implemented AML compliance and coin/token network tracking for fraud prevention. Shipped native iOS and Android crypto wallet apps. Delivered 2 Ethereum smart contract products.

CryptoFinTechB2CExchange
Please screenshot 1Please screenshot 2Please screenshot 3

Please

Terminated

Decentralized travel startup — shipped web, iOS, and Android platform backed by Ethereum smart contracts. Authored white paper and pitch deck. Raised $800K seed and launched ICO in Q4 2018.

TravelB2CBlockchainChatbot
02 — Teaching

Courses, writing & certifications.

03 — Background

building product.

Software Developer

Aderans Insurance Expertise · Istanbul

2008 — 2012

Government Grant — 5M TRY

Authored and shipped 6 R&D projects to the Turkish Ministry of Industry & Technology at HProTravel — secured 5M TRY in state subvention for product innovation.

04 — Recommendations

& Previous Work.

His vision of products combined with technical skills and soft skills make him a true product manager. He trusts data instead of guesses and values quality above all. His skills in data-driven approach and ability to see the big picture make him a trustworthy colleague you can always rely on.

Sinan İslekdemir

Software Engineer · Elisa Industriq

Sarper is one of the most successful product managers I have had the privilege of working with. His 'can do' attitude and ability to resist low-value, high-cost feature requests is a major advantage for any company looking to create iterative but stable products.

Burak Alparslan

Lead Product Manager · SmartMessage

He is open minded, smart and analytical thinker. He knows how to plan and build the right product based on customer feedbacks, market conditions and product data. Having good empathy, he can communicate greatly with both technical and business partners.

Faruk Temur

Founder · Nexo · Travel Tech

He is a constructive individual with good follow up and communication and technical skills. He adds value to what he does, is a team player, and always likes learning new things and improving himself.

Nevgül Bilsel Safkan

General Director · Sabancı Foundation

I was working with Sarper for more than 5 years. I can definitely say that he is a very experienced product manager, careful to all details and needs of the requester team. It's been a great pleasure working with him.

Elizaveta Sadak

Director of Contracting · Go Global Travel

Sarper has always been a great ally with his approachability and knowledge of the product. He was a good listener and excellent problem solver. His coordination skills were especially handy keeping everyone informed on updates and issues in a timely manner.

Pinar Sungur

Director of Sourcing · HotelsPro

No matter how much the workload, he always finds the time to support his colleagues and business partners with his technical knowledge and friendly, team-oriented approach. Working with him made the most difficult concepts very easy to catch.

Marco Masulii

Engineering Manager · Agoda

I worked with Sarper in the same product team for more than 3 years. He has been one of the most successful amongst other product managers. His can-do attitude and ability to resist low-value, high-cost feature requests will be a major advantage for any company.

Güneş Ulutürk

Asst. VP Product · P Tech

Sarper is a helpful and experienced product manager. He has quite much experience in product management and he likes to share it with juniors. He is a positive person and a good listener. He was the product manager of Compass which was built from scratch and proven to be a good product.

Gizem Terzi Türkoğlu

Head of Marketing · Kartaca

He is planned and priority oriented. In spite of his focus on his plan, he was flexible enough to manage on-the-spot issues because he always sees the big picture. He is a smiling face who keeps calm during major crises. I would like to co-work with him again.

Tuba Kodamanoglu

Head of Customer Support · SG Veteris

Sarper is always at the forefront with his attention to detail, his teaching approach and work ethic. He never shies away from taking on complex process problems both within and outside the team. He is the go-to person for quick solutions on long-running, high-complexity projects.

Zeynep Ece Varol

Head of Product · Emlakjet

Sarper is solution-oriented, knows his teammates' strengths and personalities well, and picks up the load during busy periods. He has the rare ability to simultaneously carry out the roles of Project Manager, Team Leader, and Developer — all while being genuinely enjoyable to work with.

Burhan Çetin

Software Development Manager · Şanstech

0112

Remote-first

0 countries.

Worked and lived across Europe, Middle East,
Asia & the Americas.

05 — Work With Me

Three ways in.

Fractional CPO

Your first or next product leader — without the full-time overhead. I own roadmap, team, and execution.

2–3 days/week3-month minimumEarly-stage & scaling

AI Product Sprint

From idea to working product in weeks. I build alongside your team or solo — web, mobile, or backend.

AI-nativeFull-stackShip-first mindset

Product Advisory

One focused engagement — strategy session, roadmap review, or product audit. Single session to retainer.

Async or liveAny stageActionable output
06 — Contact

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Open to fractional CPO engagements, AI product builds, and advisory retainers.