Why pre-screen voice interface designers before the portfolio review
The happy path takes an afternoon. The job is everything after it: the system mishears a name, the user speaks over the prompt, the third attempt fails and somebody has to decide what happens next. Designers worth hiring have written those recovery paths and tested them with people who do not sound like the design team. A short screen asks what happens on the third failure.
What actually matters when screening Voice User Interface Designer candidates
- 01
Portfolio
Ask to walk through shipped voice experiences: Alexa skills, Google Actions, IVR redesigns or in-car assistants. Look for sample dialogues, flow diagrams and persona documents they authored.
- 02
Craft and rationale
Probe handling of error recovery, reprompts, barge-in, confirmation strategy and SSML tuning. Ask why they chose implicit over explicit confirmation in a specific turn.
- 03
Feedback and iteration
Test how they use transcripts, utterance logs and intent confusion data to revise dialogue. Ask about a flow rewritten after Wizard of Oz or usability testing.
- 04
Working with the brief
Check collaboration with NLU engineers, linguists and product owners: writing intent and slot specifications, scoping voice-only versus multimodal, and negotiating platform certification constraints.
Pre-screening questions to ask Voice User Interface Designer candidates
12 questions grouped by what they test. Ask the same set in every screen and score answers on a consistent scale, or send them as an async video screen and compare answers side by side.
Shipped to users
3 questions01Can you share examples of voice interface projects you have worked on?
Listen forAssistants that reached users, with usage or completion rates known rather than launch dates.
Concept work only, or projects whose completion rates were never measured.
02Do you have experience designing for the major voice assistant platforms?
Listen forPlatform constraints understood in practice, including certification rules and the invocation limits each one imposes.
Platform differences unknown, or designs that ignore what the platform actually permits.
03Have you designed a voice interface for a complex task, and how did users respond?
Listen forHonest assessment of where voice stopped being the right medium for the task.
Complex tasks forced through voice, or user difficulty attributed to unfamiliarity.
Designs for speech
3 questions04How does designing a voice interface differ from designing a screen interface?
Listen forNo persistent display and limited memory treated as the core constraints, shaping prompt length.
Voice treated as a screen flow read aloud, or long option lists offered in a prompt.
05What method do you use to prototype a voice interface design?
Listen forDialogue read aloud early, with prompts tested by ear before anything is built.
Prototyping limited to flow diagrams, or prompts never spoken before implementation.
06How do you balance functionality with simplicity in your voice designs?
Listen forA small set of well-supported intents, with the rest handed to a screen or a person deliberately.
Every function exposed through voice, or capability prioritised over reliable recognition.
Handles misrecognition
3 questions07How do you design a voice interface to handle errors or incorrect commands?
Listen forEscalating recovery with confirmation for costly actions, and a defined exit after repeated failure.
The same prompt repeated on failure, or no route out when recognition keeps failing.
08How familiar are you with speech recognition technology?
Listen forRecognition confidence used in the design, with accuracy varying by accent and noise understood.
Recognition assumed accurate, or confidence scores not used to decide when to confirm.
09Can you describe your process for user testing in voice design?
Listen forTesting with varied accents, ages and background noise, listening to where people hesitate.
Testing limited to the team, or sessions run in quiet conditions that users never experience.
Accents and access
3 questions10How do you ensure a voice interface is accessible to users with visual impairments?
Listen forAwareness that voice is a primary interface for some users, with pace and verbosity adjustable.
Accessibility assumed because the interface is spoken, or screen reader interaction not considered.
11How do you handle language and cultural differences in voice design?
Listen forRegional phrasing and name recognition addressed, with translation treated as redesign not conversion.
Prompts translated directly, or recognition tuned only for one regional accent.
12How do you integrate user feedback into your voice design process?
Listen forTranscript and failure logs reviewed regularly, with prompts rewritten based on what users actually say.
Feedback limited to ratings, or failed utterances never reviewed after launch.
How to score responses
Score every candidate on the same four criteria immediately after the screen. At this stage you are shortlisting for panel interviews, not making the final call.
Portfolio
35%5Shows named shipped assistants with dialogue flows, prompt scripts and persona docs, plus containment or task completion numbers before and after.
Craft and rationale
25%5Explains reprompt ladders, no-match and no-input handling, and TTS prosody choices with reasoning tied to user intent and cognitive load.
Feedback and iteration
25%5Cites specific transcript findings, expanded utterance sets or rewritten prompts, and reports the drop in fallback or hang-up rates afterwards.
Working with the brief
15%5Translates ambiguous product goals into annotated flows, intent schemas and acceptance criteria engineers can build against without repeated clarification.
The happy path takes an afternoon; the rest is recovery. A one-way video screen asks what happens on the third failure.
Try it on HirevireScreening FAQ
Process basics
How long should a pre-screening round for this role take?
Fifteen minutes across eight to ten questions, answered async. Enough to establish shipped work, test how they design for speech, and check error handling and accessibility thinking.
Why does a video screen fit this role particularly well?
Because the work is spoken. Hearing a candidate read a prompt they wrote tells you whether it sounds natural, which is exactly what a written portfolio cannot show.
Evaluating answers
What is the strongest signal when screening this role?
What happens on the third failed attempt. Designers who shipped have a defined path, usually a handover to a person. Anyone who has not considered it has designed the happy path only.
How do I judge their testing?
Ask who they tested with. Real answers include accents, older users and noisy environments. Anyone testing only with colleagues has built for people who already know the commands.
Go deeper on this role
Sanat has been hiring since 2012 and watching the recruitment industry change up close ever since, and turned that screening process into Hirevire's video screening platform. LinkedIn
