← Back to Guides

2026-01-08

How to Evaluate a Developer's Communication Skills

How to Evaluate a Developer's Communication Skills

Communication skills are often undervalued in technical hiring, yet they're among the strongest predictors of a developer's long-term success on your team. A brilliant engineer who can't articulate their ideas, ask clarifying questions, or document their work creates friction, slows down projects, and damages team morale.

The challenge for recruiters is that communication is harder to measure than coding ability. You can't run communication skills through a linter or unit test. But you can—and should—systematically evaluate them during your screening and interview process.

This guide walks you through proven methods to assess developer communication skills, spot red flags early, and identify candidates who'll thrive in your company's culture.

Why Developer Communication Skills Matter

Before diving into evaluation methods, let's establish why this matters to your hiring pipeline.

Hidden cost of poor communicators: A developer who writes solid code but can't explain their architectural decisions, leaves tasks in ambiguous states, or ignores Slack messages creates a tax on the entire team. Other engineers spend time clarifying requirements, tracking down status updates, or redoing work due to misunderstandings. Studies suggest poor communication in engineering teams increases project timelines by 15-25%.

Remote and distributed work amplifies communication gaps. If your team is hybrid or fully remote, synchronous communication becomes even more critical. You can't tap someone on the shoulder to ask a quick question—everything is written, async, and permanent. A developer who struggles with written communication becomes a bottleneck in async environments.

Effective communicators compound team productivity. Engineers who clearly explain their thinking, ask thoughtful questions, and document their work become force multipliers. They unblock teammates, reduce onboarding friction, and elevate code quality through better collaboration.

The Five Dimensions of Developer Communication

Communication isn't monolithic. Developers need different communication skills depending on context. Evaluate across these five dimensions:

1. Technical Explanation Clarity

Can the developer explain complex technical concepts in a way others understand?

What to listen for: - Breaking down complexity into digestible pieces - Using analogies or examples to clarify abstract concepts - Avoiding unnecessary jargon or explaining it when used - Checking for understanding ("Does that make sense?" or "Any questions?") - Acknowledging when something is complicated versus oversimplifying

Red flags: - Assuming listeners have specific domain knowledge - Using five technical terms where two would suffice - Going too deep into implementation details when high-level explanation was requested - Refusing to explain things differently when first explanation didn't land

2. Written Communication

How effectively does the developer communicate asynchronously?

What to evaluate: - Clarity in emails, Slack messages, and documentation - Ability to structure written information logically - Appropriate level of detail for different audiences - Proofreading and professionalism - Responsiveness to written questions

Red flags: - One-word responses to nuanced questions - Stream-of-consciousness writing without structure - Ignoring written communication for days - Excessive verbosity or inability to be concise - Defensive or dismissive tone in written exchanges

3. Active Listening

Does the developer actually hear what others are saying, or do they interrupt, assume, and move on?

What to listen for: - Asking clarifying questions before offering solutions - Referencing specific details from earlier in the conversation - Acknowledging others' perspectives even when disagreeing - Summarizing back to confirm understanding - Adapting explanations based on feedback

Red flags: - Interrupting frequently - Offering solutions before fully understanding the problem - Talking over others or dominating conversations - Dismissing concerns without consideration - Asking "Any questions?" then rushing through answers

4. Collaborative Problem-Solving

Can the developer work through problems with teammates, or do they retreat into silos?

What to observe: - Willingness to brainstorm and explore multiple approaches - Ability to explain their reasoning without defensiveness - Openness to feedback and alternative solutions - Asking for help when stuck (vs. spinning wheels alone) - Teaching others and sharing knowledge

Red flags: - Defensive when questioned about approach - Treating collaboration as an interruption - Refusing to consider alternatives - Never asking for help or feedback - Hoarding knowledge or gatekeeping information

5. Stakeholder Communication

How well do they communicate with non-technical stakeholders?

What to assess: - Explaining technical constraints in business terms - Managing expectations about timelines realistically - Providing status updates proactively - Translating requirements from stakeholders back to technical terms - Maintaining professionalism in challenging conversations

Red flags: - Using heavy jargon with non-technical audiences - Making commitments without understanding tradeoffs - Going radio silent on status - Blaming others or making excuses - Condescending tone toward non-technical team members

Evaluation Methods: Screening Through Offer

Phone Screen (15-20 minutes)

The initial phone screen is your first chance to assess communication. Spend less than half the time coding and more time talking.

Specific techniques:

Ask open-ended questions about past work. Instead of "Did you work on microservices?" ask "Tell me about a complex project you've worked on—what made it complex and how did you approach it?" Listen for how naturally they explain things.

Follow up with "Tell me more." When they finish explaining something, don't immediately move on. Say "Tell me more about that" or "How did your team handle that?" This reveals whether they can sustain explanation or if they're parroting talking points.

Ask about collaboration. "Describe a time you disagreed with a teammate's approach. What did you do?" This reveals both conflict communication and active listening. Someone who says "I explained why they were wrong and we did it my way" communicates very differently than someone who says "I asked questions to understand their reasoning, shared my concerns, and we found a hybrid approach."

Listen for questions back. Do they ask you questions about the role, team, or technical stack? Engineers who ask good questions tend to be better communicators.

Assess responsiveness to feedback. If you say "I didn't quite understand—can you explain that differently?" do they get defensive or do they rephrase helpfully?

Take-Home Assessment (if you use them)

If you assign coding challenges, add a communication component: require a brief writeup explaining their approach.

What to evaluate in the writeup: - Can they explain their solution clearly? - Do they acknowledge tradeoffs and why they made certain choices? - Do they document assumptions? - Is the writing organized and scannable?

Don't just grade the code—also grade the explanation. A perfectly coded solution with a confusing explanation is a communication problem.

Technical Interview (60 minutes)

The technical interview is where you can deeply assess communication in context.

Before diving into code: Spend 5-10 minutes discussing a previous project. "Walk me through a significant technical challenge you faced." Listen for: - Do they explain the context before jumping to the solution? - Can they adapt their depth based on your questions? - Do they check understanding with you?

During the coding problem: Most recruiters focus on whether the candidate solved it. Also listen for: - Thinking out loud: Do they narrate their approach, or do they code silently? Thinking aloud demonstrates confidence and lets you understand their reasoning. - Asking clarifying questions: Before coding, do they ask about edge cases, constraints, and requirements? This is a sign of good communication and thoughtfulness. - Explaining their choices: "I'm choosing a hash map here because..." vs. just coding. The explanation reveals whether they understand tradeoffs. - Responding to hints: If you suggest a different approach, do they listen and adapt? Or do they defend their original choice without considering alternatives?

After finishing: Ask "Walk me through your solution" again. Can they explain it clearly to someone unfamiliar with their thought process?

System Design Interview (if applicable)

System design conversations are pure communication assessment disguised as technical evaluation.

What to evaluate: - Do they ask clarifying questions before designing? - Can they explain architectural decisions simply? - Do they check your understanding and invite feedback? - Can they adapt when you raise concerns? - Do they use clear language, diagrams, or other tools to communicate?

Someone who designs a poor system but communicates it clearly and responds to feedback is a better team member than someone who designs correctly but can't explain it.

Behavioral Interview

Behavioral interviews specifically target communication and collaboration patterns.

Use the STAR method (Situation, Task, Action, Result) but listen for communication details:

  • S&T: Do they set context clearly? Do you understand the situation before they explain their action?
  • A: Did they communicate effectively with teammates? What was the communication like? Did they ask questions, clarify requirements, or document decisions?
  • R: Did they communicate the result clearly? Did they discuss it with stakeholders or teammates?

Dig into collaboration stories:

"Tell me about a time you had to explain something technical to a non-technical person."

"Describe a situation where you needed to ask for help. What made you decide to ask?"

"Tell me about a time you had a miscommunication with a teammate. How did you resolve it?"

Listen for self-awareness, accountability, and specific communication actions—not excuses.

Reference Checks (often overlooked)

Reference calls are goldmines for communication assessment, but recruiters often ask generic questions.

Ask specific questions:

  • "How would you describe [candidate]'s communication style? Give me an example."
  • "Tell me about a time they had to explain something complex to the team. How did they handle it?"
  • "How responsive were they to messages and requests for updates?"
  • "Describe their ability to work on a distributed team. Were there any communication challenges?"

Listen for specifics. A reference who says "They're great to work with" is less useful than one who says "They're very responsive on Slack but sometimes get bogged down in too much detail in documentation."

Red Flags to Watch For

Red Flag What It Means Action
One-word answers despite open-ended questions Difficulty articulating thoughts or lack of engagement Dig deeper or reconsider fit
Defensive when you ask clarifying questions Struggle with feedback or collaboration Concerning for team dynamics
Long pauses and "ums" in explanations Possible lack of practice or confidence in communicating May improve with coaching
Talks over you or interrupts frequently Doesn't listen actively High risk for team conflict
Can't explain their own code Didn't write it, or doesn't understand their own work Major red flag
Never asks questions Lacks curiosity or confidence Could struggle in new environments
Blames previous teams/jobs Poor communication about problems Likely to repeat pattern
Technical jargon with non-technical interviewer Can't adjust communication to audience Problem for cross-functional work
Radio silence after interviews Unresponsive communication style Red flag for async environments

Scoring Framework

Create a simple scorecard to make evaluations consistent:

Rate each dimension 1-5:

1 = Significant concerns (potential dealbreaker) 2 = Below expectations 3 = Meets expectations 4 = Exceeds expectations 5 = Exceptional

Minimum thresholds: - For senior roles or leadership: No dimension should be below 3. Communication compounds at senior levels. - For mid-level roles: Aim for 3 or above across the board. One weakness can be offset by other strengths, but only slightly. - For junior roles: 2-3 is acceptable on technical explanation (they'll learn), but active listening and willingness to collaborate should be 3+.

The specific weighting depends on your role and company. A developer working on documentation-heavy APIs needs higher written communication scores. A distributed-first company needs higher async communication scores.

Improving Your Evaluation Process

Record and review

If candidates agree, record technical interviews. Review them afterward with your team. You'll often catch communication patterns on replay that you missed live.

Calibrate as a team

Have multiple interviewers score candidates on communication, then compare notes. Where you disagree often reveals biases. Some interviewers may penalize accents or communication styles that differ from their own.

Interview preparation guides

Send candidates a prep guide before interviews. Include: - "We'll ask you to explain technical decisions—think about how to communicate those clearly" - "Please ask questions throughout the interview" - "We value clarity—if something is unclear, let us know"

This sets expectations and gives anxious candidates permission to communicate naturally.

Track outcomes

After hiring, track which communication assessment predictions held true. Did the candidate who scored low on written communication actually struggle with async communication in your codebase? Did the excellent collaborator live up to the assessment? Use this data to refine your evaluation process.

Building Communication Into Your Team

Once you've hired developers who communicate well, maintain those standards:

  • Document decisions: Require short writeups for architectural decisions. This sustains written communication expectations.
  • Async-first documentation: Require status updates and decision logs. This reinforces clear communication.
  • Code review communication: Establish norms for how code reviews are discussed (respectful, curious, not condescending).
  • Pair programming and mentoring: Pair strong communicators with newer team members to model communication norms.

The easiest way to hire great communicators is to build a company culture where communication is valued and expected.

FAQ

How much weight should communication skills have vs. technical skills?

This depends on your role and seniority. For junior roles, technical skills are more important (communication improves with time). For senior roles and leadership positions, communication should be weighted equally or more heavily. A senior engineer who can't communicate effectively is worse than a mid-level engineer who can.

What if someone is a great communicator but weak on technical skills?

Technical skills can be learned; communication patterns are harder to change. That said, if they're weak on fundamentals, no amount of communication skill fixes it. Look for candidates who are solid-to-good technically AND communicate well. Don't compromise on either.

How do you assess communication in technical interviews if you're using a prepared problem?

Use the problem as a vehicle for communication, not just a coding challenge. Ask clarifying questions before they code. Have them think aloud. Ask them to explain their approach before and after coding. A prepared problem can absolutely assess communication if you listen for it.

Should you weight communication differently for remote vs. in-office roles?

Yes. For fully remote roles, written and async communication should be weighted higher. For in-office roles, you might weight synchronous communication higher. But don't ignore communication for in-office roles—even co-located teams need clarity.

How do you handle cultural differences in communication styles?

Be aware that communication norms vary across cultures. Direct eye contact, question-asking patterns, and discussion styles differ globally. Evaluate communication effectiveness, not conformity to a specific style. Someone who communicates differently but effectively is not a communication risk.

Find Better Communicators Faster

Assessing communication skills takes intentional effort, but it's the single highest-ROI part of developer hiring. Communication problems compound over time; good communicators compound team productivity.

To find developers who communicate well—along with the technical skills you need—use Zumo. Zumo analyzes actual GitHub activity, commit messages, and collaboration patterns to identify developers who ship, collaborate, and communicate clearly. Skip the surface-level resume screening and find engineers who'll actually integrate well with your team.

Learn how Zumo helps you source better developers.