Jules Walter on PM Skill Building, Mentorship, and the Shadow Side of Strengths

Jules Walter on PM Skill Building, Mentorship, and the Shadow Side of Strengths

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Jules Walter on PM Skill Building, Mentorship, and the Shadow Side of Strengths

Source: Lenny’s Podcast Speaker: Jules Walter Link: Episode

Jules Walter grew up in Haiti, studied computer science at MIT, and spent four and a half years at Slack as their first growth PM before leading monetisation and mobile. He is now a product lead at YouTube, co-founder of the Black Product Managers Network, and a board member of CodePath — two nonprofits that increase diversity in tech. He and Lenny collaborated on a widely shared piece about building product sense. This episode is among the most structured treatments of PM career development in the corpus.

Key ideas

  • IQ skills plateau sooner; EQ skills compound longer. Early-career PMs should invest heavily in hard skills: execution, product sense, strategy, interview performance. Senior PMs need a different set of skills: communication across audience types, leadership across ambiguous mandates, managing upward and across. The EQ skills take longer to develop, are harder to observe from the outside, and are uniquely specific to each person — there is no universal EQ curriculum.
  • Interview skill is a gating skill. Walter makes the counterintuitive observation that the skill most responsible for getting access to the environments where rapid PM growth is possible is interview performance — not raw product ability. Mock interviews, in volume, are the single highest-leverage investment for someone trying to get into a top-tier company.
  • Mentorship scales from small asks. Walter’s approach: make the smallest possible initial ask (a two-sentence email question, not a coffee chat), demonstrate that you used the advice, circle back with results, and build the relationship incrementally. Every significant mentor relationship in his career — Bangaly Kaba on growth, Lawrence Ripsher on strengths and leadership, Aaron Teague on Google — started with a small ask at an event or a cold email.
  • Strength shadows. Walter’s breakthrough with Lawrence Ripsher: a strength and its shadow are the same dial, not two separate traits. Walter’s strength is asking great clarifying questions; the shadow is asking them without context, which reads as junior or uncertain. Naming the shadow does not eliminate it — it makes the dial visible and adjustable.
  • Enthusiastic gratitude is the mechanism that gets you more feedback. The EQ deficit most likely to plateau a PM career is lack of candid feedback. Candid feedback requires psychological safety. The most reliable way to build that safety is to respond to feedback — even when it stings — with visible, genuine appreciation. If people learn that feedback is received well, they give more of it.

Topics covered

  • Walter’s path: Haiti → MIT → medical devices → startup → Slack growth PM → YouTube
  • Bangaly Kaba and learning growth frameworks in six months at Slack
  • IQ skills: execution, product sense, strategy, interview performance
  • EQ skills: communication, leadership, management, listening to learn
  • Interview skills as a gating variable for PM career access
  • Mock interviews: volume, deliberate practice, community prep groups
  • The racial dimension of interviewing: psychological overhead for underrepresented candidates
  • Building skill with a forcing function: set a concrete outcome, work backwards
  • Learning by reverse-engineering great artefacts (strategy docs, exec updates)
  • Attending presentations to observe the backstage of great PMs
  • Finding and approaching mentors: small asks, follow-up, reciprocity
  • The strength shadow model and how to apply it
  • Receiving feedback as a skill: specific asks, self-critical opening, enthusiastic gratitude
  • CodePath and Black PMs: origin stories and current scale