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Tristan Berguer

Product Lead for AI and B2B SaaS

jobs@tristanberguer.com | Available immediately from France · Able to align with US working hours · Open to US relocation | linkedin.com/in/tristanberguer | github.com/minipouce | x.com/TBerguer

Summary

Senior Product Manager for AI and B2B SaaS, with ten years in SaaS across founding teams and product organizations. At Taplio, part of lempire, joined as Product Manager in September 2024 and was promoted to Interim CEO in December. Led a five-person turnaround: rebuilt activation around what kept long-term customers, cutting first-month churn among new trial users from 93 to 40 percent and taking ARR from EUR 5M to EUR 7M without raising prices or increasing acquisition. Earlier, owned product and go-to-market for lemcal inside lemlist, and set product direction at NiceCactus with a 60-person engineering organization. Available immediately from France, able to align with US working hours, open to US relocation. French citizen: US employment requires visa sponsorship.

Experience

Founder & Product Engineer, Independent

Mar 2025 – Present

A focused year building and validating AI products end to end.

  • Built and validated AI products end to end, from discovery and architecture through code, deployment, pricing and go-to-market.
  • Senthor, a paywall for AI crawlers: co-founder and CEO. Validated the opportunity and explored fundraising before pausing active development based on market timing.
  • Relaunched Buska in April 2026 after rebuilding the product, then grew MRR by roughly 40% month over month over the following five months.

Product Manager, then Interim CEO, Taplio

Sep 2024 – Mar 2025

LinkedIn growth product inside lempire, with revenue already falling.

  • Joined as Product Manager in September 2024 and was promoted to Interim CEO in December, leading a five-person product turnaround.
  • Rebuilt activation around the behavior and feedback of long-term customers.
  • Reduced first-month churn among new trial users from 93% to 40% and increased ARR from €5M to €7M between December 2024 and March 2025, without raising prices or increasing acquisition.

Product Manager, lemlist

Feb 2023 – Oct 2024

lemcal, a Calendly competitor built around ultra-personalisation.

  • Owned product, positioning, marketing and acquisition, working closely with engineering.
  • Helped take lemcal from concept to €50k ARR within six months of launch.
  • Helped more than 1,000 existing Calendly users switch to lemcal.

Founder & CEO, Carimmat

Sep 2019 – Jan 2023

A consumer app that matches people by licence plate.

  • Founded and operated Carimmat from concept to 200,000 registered users.
  • Owned product, acquisition, fundraising and operations while building and managing a five-person team.
  • Raised €500k and secured national television, radio and press coverage.

Co-founder · CMO, then CPO, NiceCactus

May 2017 – May 2019 | Exited 2019

Esports SaaS helping players and teams turn professional.

  • Co-founded Esport-Management, later NiceCactus, and served as CMO then CPO.
  • As part of the founding team, helped raise €12M and grow the company to nearly 100 employees.
  • Directly managed an eight-person marketing team that acquired 1.5 million registered users in 18 months.
  • Led product direction across an approximately 60-person engineering organisation and exited by selling my shares in 2019.

CMO, then CTO, Riskattitude

Apr 2016 – Dec 2017

Natural-hazard startup, marketing then engineering.

  • Ran marketing and communications, then moved to the technical side and built the website and the Risk@lertes mobile app for iOS, Android and Windows Phone.
  • Transitioned to a part-time technical role while launching NiceCactus, then joined NiceCactus full-time after its funding round.

Products Built

Skills

Languages

French: Native | English: Professional working proficiency