Team Lead Guide: Decisions, People and Delivery
Moving from developer to team lead is mostly a change in how you decide and communicate. This guide follows the team-lead series: first how to explain your choices, then delivery and quality, then people, then strategy and culture.
Each lesson ends with interview-style questions and model answers, so it also works as preparation for lead interviews.
Who it is for: Senior developers stepping into leadership, and team leads who want a shared vocabulary for decisions and habits.
18 lessons · Published by Jainik · Last updated
1. Think and decide
- 1. Team Lead Mindset · 15 minHow a Team Lead Thinks: The Questions Behind "Why?"
The six-step answer shape (goal, options, choice, reason, risk, plan B), how to think out loud, and a map of the questions a lead asks.
- 2. Team Lead Mindset · 14 minWhy This Package? Choosing and Carrying Dependencies
Six questions before you add a dependency, npm commands to check health, how to plan the exit, and a short decision-note template.
- 3. Team Lead Mindset · 14 minWhy This Language or Framework? Decisions You Can Explain Later
Start from the problem and the team, boring technology and innovation tokens, handling a team that wants something new, and writing decision records.
- 4. Team Lead Mindset · 15 minDesign Docs, RFCs and Writing Things Down
What real projects (Rust, Kubernetes, Python) put in a design doc, status words, a simple review process, when not to write one, and tips for clear writing.
- 5. Team Lead Mindset · 14 minLaws and Biases Every Lead Should Know
Conway, Brooks, Goodhart, Gall, Hyrum, Chesterton and more, each in one sentence with a lead's use, plus common thinking biases.
2. Delivery and quality
- 6. Team Lead Mindset · 15 minEstimates, Code Review and Priorities
Honest ranges with named unknowns, missed deadlines, quick fix versus proper fix, reviewing for better-not-perfect, and saying no with an option.
- 7. Team Lead Mindset · 16 minTechnical Debt, Quality and the Rewrite Trap
Debt as a loan with interest, refactor or rewrite, a test plan, what to monitor, and lessons from five famous public outages.
- 8. Team Lead Mindset · 15 minIncidents, Team Health and Growing as a Lead
Fix first and be blameless, DORA delivery measures without a people scoreboard, feedback, juniors, and your first weeks as a lead.
- 9. Team Lead Mindset · 14 minStakeholders, Meetings and Change
Explaining the why before the what, a five-line status update, fewer and better meetings, preparing people for change, and planning around outcomes.
3. People
- 10. Team Lead Mindset · 15 min1:1s, Feedback, Delegation and Conflict
How to run a 1:1, give specific feedback, delegate with a clear owner, handle disagreement, and build trust.
- 11. Team Lead Mindset · 15 minMentoring, Onboarding and Hiring
Context before answers, a first-90-days plan for a new hire, fair work-like interviews, and what the popular lists say about hiring.
- 12. Team Lead Mindset · 15 minCulture, Psychological Safety and Retrospectives
Daily habits that build culture, psychological safety, the brilliant jerk, remote habits, a retro template and Etsy's incident debrief method.
4. Strategy, growth and scale
- 13. Team Lead Mindset · 8 minTechnical Strategy and Roadmaps
Strategy versus wish list, roadmaps as bets with date ranges, saying no, build versus buy, migrations and a one-page strategy template.
- 14. Team Lead Mindset · 9 minCareer Growth, Promotion and the Staff-Engineer Path
Ladders, scope versus output, the IC and manager tracks, sponsorship versus mentorship, and a promotion packet template.
- 15. Team Lead Mindset · 14 minScaling Teams, Ownership and On-Call
Splitting teams with Conway in mind, a service catalogue, humane on-call, avoiding hero culture, toil and cross-team dependencies.
- 16. Team Lead Mindset · 13 minA Security Mindset for Team Leads
A 30-minute threat model, supply-chain hygiene, secrets, access reviews, SECURITY.md and security in code review.
- 17. Team Lead Mindset · 14 minRules for AI-Assisted Coding on a Team
The author owns every line, what to allow, reviewing generated code harder, agent permissions, helping juniors, measuring honestly and a one-page policy.
5. Where the ideas come from
- 18. Team Lead Mindset · 10 minSources and Reading List: Popular Repos and Documents
The most-starred GitHub lists and well-known documents behind this series, which I read directly, which I only know from summaries, and which I could not open.
More reading orders are on the guides page, and every series is listed on the home page.