5 mistakes start-up CTOs should avoid when scaling the tech team

Coding Chats episode 70 - Aaron LeClair discusses the top five mistakes startup CTOs make, covering everything from misunderstanding development pipelines to failing to make the leadership identity transition. The conversation explores AI adoption parallels, team diversity, hiring pitfalls, the "move fast and break things" mantra, and why a CTO's first team should be the C-suite — not the engineering team.Chapters00:00 Scaling the Pipeline: Common Mistakes of CTOs03:13 Understanding the Development Environment05:59 The Importance of Team Diversity09:03 Building Effective Teams11:53 Hiring for Fit: The Cost of Misalignment14:36 The Role of Leadership in Team Dynamics33:52 Building Effective Teams as a Leader37:35 Transitioning from Engineer to Leader43:31 Hiring the Right Technical Leaders46:01 Understanding the Role of CTO in Start-ups54:40 The Balance of Speed and Quality in Development01:01:24 Exploring Related ContentAaron's Links:https://www.linkedin.com/in/aaronleclair/John's Links:John's LinkedIn: https://www.linkedin.com/in/johncrickett/John’s YouTube: https://www.youtube.com/@johncrickettJohn's Twitter: https://x.com/johncrickettJohn's Bluesky: https://bsky.app/profile/johncrickett.bsky.socialCheck out John's software engineering related newsletters: Coding Challenges: https://codingchallenges.substack.com/ which shares real-world project ideas that you can use to level up your coding skills.Developing Skills: https://read.developingskills.fyi/ covering everything from system design to soft skills, helping them progress their career from junior to staff+ or for those that want onto a management track.TakeawaysScaling your dev team without first fixing QA, product management, and stakeholder flow will create more problems than it solves.AI adoption falls into the same trap — faster code generation doesn't help if requirements, testing, and deployment are still bottlenecks.Invest in tooling, DevOps, and documented processes early, as poor systems frustrate great engineers just as much as poor management.Always ask why a process exists — the original reason may no longer apply, and changing it is often easier than expected.Build teams like an Ocean's 11 cast: diverse in skills, backgrounds, and working styles, not a clone army of specialists in the same stack.Hire generalists with depth in different areas who can flex as start-up needs shift, and reserve deep specialists for your true business differentiators.A failed hire is most often a leadership failure — you had more information than the candidate, so treat every miss as a learning opportunity.The most important things a CTO does are hiring and developing people — if a leader is still submitting PRs to a team of more than three, that's a red flag.A CTO's primary team is the C-suite, not the engineering team — treating engineers as "your team" creates an us-vs-them culture that damages the whole business.Match technical leadership seniority to your company stage — pre-product-market-fit you need a generalist head of engineering, not a full CTO."Move fast and break things" is valid pre-product-market-fit for validating hypotheses, but once you have real customers it becomes an excuse for poor process.