High demand in the US

System design interview in the USCoding and system-design interview

LeetCode-style rounds and system design, out loud. From someone who has done it, over a video call.

$120–400typical price

Post this task, free See examples
A resume covered in red-pen edits beside a mock interview on a video call
System design interview for staff engineer at a payments company
Example task, written by Taskly · $400 · Photo is an illustration

The short answer

How much does system design interview cost in the US?

Coding and system-design interview in the US typically costs $120–400. On Taskly you describe what you need for free, people who have done it send offers with their own price, and you pick one. Taskly holds your money until the task is done, and you can report a problem before it’s released.

Typical price
$120–400
To post
Free
How
Video call and chat
Your payment
Held by Taskly until done

What you get

What Taskers usually deliver for this in the US. You agree the details with your Tasker before you accept an offer.

  1. 01Two 60-minute system design mocks
  2. 02Written feedback scored at staff level
  3. 03List of topics to deepen
  4. 04One-week practice plan
  5. 05Two 45-minute mock coding interviews
  6. 06Written feedback after each mock
Often comes upsystem designidempotencydouble-entry ledgerstaff engineerGoogleLeetCodePythondynamic programming

Taskers who do this

4 Taskers on Taskly list skills for this and can make offers in the US. Every Tasker is reviewed and approved by a person before they work.

How people ask for it

4 examples written by Taskly from what people search for in the US. Real tasks look like these.

  • “System design interview for staff engineer at a payments company”

    I want a mock system design interview at staff engineer level, aimed at a loop with a large payments company. I'm a senior backend engineer with ten years of experience, most recently leading a ledger service team. At staff level they expect me to drive the conversation: requirements, trade-offs, failure modes, and how the design evolves over two years.

    In practice mocks I spend too long on boxes and too little on idempotency, consistency and operational concerns. I'd like two 60-minute mocks, one on a payments-style problem and one open-ended, with detailed written feedback scored against staff-level expectations. Please share your level and interviewing experience in your offer.

    $400
    • Two 60-minute system design mocks
    • Written feedback scored at staff level
    • List of topics to deepen

    For: Senior backend engineer in the US interviewing at staff level

    Example task, written by Taskly. Yours can be one line; your Tasker will ask what they need.

  • “Prepare for a coding interview in one week before a Google onsite”

    I need help to prepare for a coding interview in one week, before my Google L4 onsite. I'm a backend engineer with four years of experience, recently laid off. I've done about 150 LeetCode problems but I'm rusty on graphs and dynamic programming. The onsite has coding rounds plus a behavioral one.

    I'd like a short plan for the week and two 45-minute mock coding interviews on video in a shared editor, run like the real thing, with feedback on communication, testing and speed. Python is my language. Please only send an offer if you can do both sessions within the next five days.

    $220
    • One-week practice plan
    • Two 45-minute mock coding interviews
    • Written feedback after each mock

    For: Laid-off backend engineer in the US with an onsite coming up

    Example task, written by Taskly. Yours can be one line; your Tasker will ask what they need.

  • “System design interview for AI engineer roles: LLM serving and RAG”

    I want mock system design interview practice for AI engineer roles, where the questions are about LLM products. I'm a machine learning engineer with five years of experience, and the startups I'm talking to ask things like 'design a retrieval-augmented support assistant' or 'design an inference service with cost limits'.

    I know the ML side but get vague on latency budgets, caching, evaluation and guardrails. I'd like two 60-minute mocks with an engineer who has built LLM systems in production, plus written feedback and a short list of patterns I should know cold. Please share relevant projects in your offer.

    $300
    • Two 60-minute AI system design mocks
    • Written feedback after each
    • Checklist of LLM system patterns

    For: ML engineer in the US interviewing for AI engineer roles

    Example task, written by Taskly. Yours can be one line; your Tasker will ask what they need.

  • “Live coding interview practice for a junior React developer”

    I need help to prepare for a live coding interview as a junior frontend developer. I finished a coding bootcamp a year ago and have been freelancing on small React sites. In live rounds on CoderPad or a shared screen, I freeze when someone is watching, even on problems I can solve alone.

    My next two interviews are for junior React roles and include building a small component (a search with debounce or a paginated list) in 45 minutes. I'd like two 45-minute mocks in that format, with feedback on how I talk through my thinking and recover when I'm stuck. Patience appreciated.

    $140
    • Two 45-minute live coding mocks
    • Feedback on thinking aloud and recovery
    • Short list of components to practice

    For: Bootcamp-trained junior React developer in the US

    Example task, written by Taskly. Yours can be one line; your Tasker will ask what they need.

The price where you are

Typical ranges from public market prices, November 2026. Every Tasker sets their own price in their offer.

Good questions

What people ask before they post this in the US.

  • 01

    How much does coding and system-design interview cost in the US?

    Usually $120–400. Each Tasker names their own price in their offer, so you see the cost before you agree to anything.

  • 02

    What separates staff from senior in system design rounds?

    Scoping the problem, naming trade-offs out loud, covering operations and failure handling, and explaining how the design changes as scale or teams grow. Breadth plus judgment, not more boxes.

  • 03

    Which topics matter for payments system design?

    Idempotency keys, exactly-once versus at-least-once processing, ledgers and double-entry, reconciliation, retries with backoff and how you handle partial failures.

  • 04

    What should I practice in the last week before an onsite?

    Your two weakest patterns, such as graphs and DP, plus timed mixed problems. Practice talking through the approach before coding, and test with your own examples.

  • 05

    How do interviewers score coding rounds?

    Problem solving, code quality, communication and testing. A clear approach with a working solution and good tests often scores better than a rushed optimal one.

  • 06

    What topics come up in LLM system design interviews?

    Chunking and retrieval, vector indexes, prompt and response caching, model routing for cost, streaming, offline and online evaluation, and how you'd detect bad answers.

  • 07

    How does paying work?

    Posting is free. When you accept an offer you pay the agreed price. Your money is held by Taskly until you confirm the task is done. If you don’t, it’s released three days after your Tasker marks it finished — unless you report a problem.

  • 08

    Who are the Taskers?

    People who have done what you need: worked at the company, passed the exam, made the move. Every Tasker is reviewed and approved by a person before they work.

More in Get hired

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Ready when you are.

Describe it in a sentence. People who have done it send offers, usually $120–400.