Hiring a Tech Lead: How to assess technical leadership in an interview

AI This article was created with the help of AI.

Which decisions should the Tech Lead be responsible for?

The title Tech Lead is the most poorly defined leadership role in engineering. In one company, it means architectural authority over three teams; in the next, it is a Senior Developer with slightly more meetings in their calendar. Before you start a search, you must therefore define in writing which of the three levels of responsibility the role actually carries: technical architectural decisions, operational implementation responsibility, and personnel responsibility. Tech Lead and Engineering Manager are different levels, and anyone who mixes both into one position without naming it will end up looking for a person who does not exist.

The assignment feeds directly into the team structure. DORA research describes loosely coupled teams as those that can implement large-scale design changes without approval from someone outside the team and complete work without fine-grained coordination with other teams. If you want your Tech Lead to enable this independence, they need decision-making rights exactly where your bottleneck lies.

Where do the most important technical dependencies lie?

• Incorporate interfaces to product: Who prioritises when technical and product goals clash?

• Interfaces to operations and platform: Who approves infrastructure changes, and to what extent can the team decide for itself?

• Interfaces to neighbouring teams: Which dependencies should be reduced, and which remain intentionally?

• Align decision-making rights with the bottleneck: Authority belongs where the waiting time occurs, not in the hierarchy.

Which work sample makes judgement visible?

Whiteboard puzzles and algorithm exams test how quickly someone solves puzzles under exam pressure. Judgement shows itself elsewhere: in the ability to justify a real architectural decision with alternatives, trade-offs, and consequences. For this, take a real, anonymised decision from your day-to-day work, such as replacing a monolithic module, migrating a data store, or introducing a new deployment path.

1. Initial situation: System context, boundary conditions, and the problem that triggered the decision.

2. Options: At least two to three realistic paths, including the path of changing nothing.

3. Trade-offs: Costs, risks, dependencies on other teams, and what each option means for delivery capability.

4. Decision: Which option the candidate chooses and why.

5. Consequences: What the decision means for operations, onboarding, and further development in six months.

Do not evaluate the chosen option, but the reasoning. Good Tech Leads name risks on their own, bring up dependencies on product and neighbouring teams unprompted, and state clearly under what conditions they would revise their decision. DORA research on continuous delivery serves as a technical reference framework: it relies, among other things, on automated tests and continuous integration, and high performers receive feedback from their tests in less than ten minutes. If a candidate talks about architecture without mentioning testability, feedback speed, or deployability, this exact judgement is lacking.

How is leadership behaviour tested in practice?

Charisma is the most expensive proxy in recruiting: it correlates with the interview, not with team performance. Instead, test leadership behaviour in past situations and have them describe concrete actions, not self-descriptions like "I am a people person".

• Hard feedback: "Describe the last conversation in which you told an experienced developer that the quality was not sufficient. What was the situation, what did you say, what was the result?"

• Prioritisation in conflict: "When was the last time you had to postpone a technically important task in favour of an urgent product requirement? How did you decide and communicate this?"

• Conflict resolution: "Tell me about a situation in which two team members stopped working with each other. What did you do?"

DORA research gives you a validated benchmark: transformational leadership is measured across five dimensions, including vision, inspirational communication, and intellectual stimulation, and is demonstrably correlated with software delivery performance. Crucially, effective leadership does not directly impact delivery, but by enabling the adoption of technical and product practices in the team. So ask about the practices the person has established in the team, not how inspiring they sound.

Define warning signs before the interview. These include dodging to team achievements without visible action of their own, the lack of a single concrete example of conflict resolution, and answers that blur into "we" as soon as mistakes are discussed. How demanding such leadership searches are in the DACH market is shown, for example, by the filling of a cybersecurity leadership role for avodaq AG within eight weeks: the market for leadership profiles is small, and without a clear requirement profile it becomes even smaller.

What key points does Nova Search need for the search?

The more precise the mandate, the less CV noise. Once decision-making authority, work sample, and leadership assessment are established, they can be translated directly into a briefing. This saves you time on both sides: the search starts on the right profile, and the first suggestions are already screened against your real requirements instead of a title.

• Assigned decision-making powers: Which of the three levels of responsibility does the role carry, and which explicitly not?

• Tech stack and architectural context: System landscape, maturity of testing and deployment, upcoming migrations.

• Team environment: Team size, experience mix, interfaces to product and operations, reporting line.

• Verifiable success criteria: Derived from your work sample and your leadership questions, e.g. how the person justifies a concrete architectural trade-off.

• Contrast criteria: How the role differs from a Senior Developer or an Engineering Manager.

Work samples and leadership assessments thus become verifiable success criteria: instead of "strong Tech Lead with leadership experience", the mandate states what decision-making powers the role carries and in which situations judgement must be demonstrated in the process. This is exactly what Festanstellung (Permanent Recruitment) from Nova Search is built for: after a briefing of around 60 minutes on the role, tech stack, and team culture, you will receive a first qualified shortlist in 5 working days via a two-stage screening consisting of a deep technical check and a culture interview, accompanied by structured feedback within 48 hours and backed by the 90-day guarantee. If you want to check in advance whether a specialised recruitment consultancy is right for your case, it is worth taking a look at the six criteria for choosing a tech recruitment consultancy 6 Kriterien. And because tech lead roles in AI/tech environments have their own market rules, you will also find the right market insights for AI and tech roles there KI- und Tech-Recruiting.