All roles

We build the voice agent you would hire a voice AI engineer for.

Bigcircle does not place engineers. A voice agent in production is a latency budget spent across turn detection, transcription, reasoning, tool calls and speech, plus interruption handling and a record of every call. We have built voice agents in English, Hindi and Hinglish, and we deliver them as a studio engagement through our AI voice agents service.

In short

Bigcircle does not place voice AI engineers. Our team builds the voice agent as a latency budget spent across turn detection, transcription, reasoning, tool calls and speech, with every call recorded and replayable. On an insurance voice build in English and Hindi, end-to-end response fell to around 900 milliseconds.

Key facts

Definition

A voice AI engineer on a Bigcircle team keeps barge-in and turn-taking stable when every line is busy, in English, Hindi, and Hinglish, and grounds the call in live data through tools.

How Bigcircle does it

  1. Bigcircle vets its own team starting from a line the engineer shipped.
  2. The exercise breaks interruption handling, and Bigcircle watches the engineer get the turn back.
  3. On a Bigcircle build every call is recorded, structured, and replayable, because a correct transcript can still be a failed call.

Comparison

A transcript-correct call can still fail the caller, while the voice engineer on a Bigcircle team treats barge-in and turn-taking as part of the system that has to hold under load.

At a glance

Realtime voice agents with interruption handling and a full record of every call, built by our team.

See what a production voice agent involves, what Bigcircle has built in English, Hindi and Hinglish, and the three ways to buy it.

Who this is for
Teams that set out to hire a voice ai engineer to build a system, and would rather buy the working system.
Topics
  • Streaming STT
  • Low-latency TTS
  • Barge-in
  • SIP
  • WebRTC
  • Twilio

What the work involves in production.

  • Real-time voice agents built against a per-stage latency budget
  • Turn-taking and interruption that hold up on noisy, code-switched calls
  • Telephony and streaming transcription
  • Grounding the agent in live data through tools
  • Latency measured per stage, so a slow call can be located
  • Every call recorded, structured, and replayable

Systems we deliver in this area.

Inbound and outbound call agents
Insurance, real estate, and support voice lines
Multilingual voice assistants
Voice-based coaching and roleplay
Call analytics and quality scoring

Tools they reach for in production.

Voice
Streaming STTLow-latency TTSBarge-in
Telephony
SIPWebRTCTwilio
Logic
Streaming LLMsTool calling
Stack
PythonRealtime infraClaude / GPT

Who builds it: Bigcircle's core team scopes the system and leads the build. Every engineer on that team cleared five stages of vetting and stays on one product.

Three ways to buy the voice agent.

Every engagement is a working system, built in your repositories under your IP by the team that scoped it. The three differ only in how much of the delivery we run.

We finish it

Production hardening

Your team built something that works in the demo and stalls on real inputs. We define what good means and build the eval set, route models for cost and latency, lock down the data path, and put a safety net under it before it takes traffic.

Best when you have a prototype that will not cross into production.

We build it

Fixed-scope build

You bring the problem and we deliver the working AI system. Discovery, build, evals and deployment sit under one point of accountability, against a scope and price agreed before we start.

Best when the problem is clear and you want the result, not a team to manage.

We run it

Studio-led programme

A studio team of engineers and QA, led by our founder as your fractional CTO and architect, owns delivery on your AI roadmap. We run the build rhythm and make the hard technical calls; you bring the product context.

Best when you have a roadmap and no senior AI team to run it.

Choosing between the three is the engagement guide.

Five stages.
The top 3% remain.

Every engineer on the core team that leads your system cleared these before joining. Each stage asks whether they can keep AI running once real customers are using it.

400 applicants

3%of applicants join
the team

What removes them

  1. We start with something they built

    100% → 20%

    One real system, pressed hard. How much traffic did it take? What broke first? Who got the call when it did?

  2. We break something and watch them fix it

    20% → 9%

    A working system with a bug hidden inside it. Anyone can build a demo in a weekend. Fixing code you have never seen is the actual job.

  3. How will you know it is working?

    9% → 5%

    Before they write anything, they have to tell us how they would test it, and what they would do when it gets an answer wrong.

  4. Make it fast without running up the bill

    5% → 4%

    We give them a speed target and a budget, then ask them to explain the tradeoffs they made to hit both.

  5. It is late and the AI got it wrong

    4% → 3%

    What do you do first? How do you find out what happened, undo it, and explain it to the customer in plain words?

Common questions

  • Can I hire a voice AI engineer from Bigcircle?

    No. Bigcircle does not place engineers or do staff augmentation. Bigcircle builds the voice agent as a studio engagement through its AI voice agents service, from the conversation design and the latency budget through grounding in live data to recording and scoring every call.

  • What voice agents has Bigcircle built?

    Bigcircle built an insurance voice agent where end-to-end response fell from 2.5 to 3 seconds to around 900 milliseconds on noisy bilingual calls, and a property discovery agent that reused the same real-time loop, with replies under 1.2 seconds in English and under 1.3 seconds in Hindi and Hinglish.

  • How does a Bigcircle voice AI engagement start?

    Bigcircle starts with a conversation about the calls the agent has to handle. You get a written scope covering what Bigcircle would build, in what order, and what it depends on from your side, then choose production hardening for a prototype you already have, a fixed-scope build at an agreed scope and price, or a studio-led programme led by our founder as fractional CTO. For voice, the build runs through designing the conversation, building for the latency budget, grounding it in live data, then recording and scoring every call. The work happens in your repositories, and you own the code.

  • Who at Bigcircle builds the voice agent?

    Every engineer on Bigcircle's core team cleared five stages before joining, and the top 3% of applicants remain. Vetting starts from a system they already built, then breaks something and watches them fix it. For voice work the exercise breaks turn-taking so the agent talks over the caller, or leaves a call that cannot be replayed. They also say how they would know it is working, how they would make it fast without running up the bill, and what they do first when it is late and the AI got it wrong. They lead client builds as a team.

Tell us what the hire was meant to build.

Bigcircle does not place engineers. Describe the system and what is in the way, and an engineer replies within two hours on weekdays. A written scope follows within a week.

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