Interview preparation

Fastly interview process & preparation

Fastly currently has 48+ live openings on OnJob.io, concentrated in Software Engineer, Sales / Business Development and HR / Recruiter roles. There are no leaked or company-specific questions here — instead, prepare with the general, role-based interview rounds and most-asked questions for those role types below, then practise them free with OnJob's AI mock interview.

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Honest note: OnJob.io does not publish leaked or company-confidential interview questions. The guides below are general, role-based preparation — the standard rounds and commonly-asked questions for the role types Fastly is currently hiring for. Use them to prepare; your real Fastly interview may differ.

What to expect when interviewing for Software Engineer, Sales / Business Development and HR / Recruiter roles at companies like Fastly

Fastly is currently advertising these role types on OnJob.io. Each guide is the general interview structure and most-asked questions for that role — prepare with it, then rehearse free with the AI mock interview.

General Software Engineer interview prep

14 live roles at Fastly

Coding, data structures, algorithms and system design — the core software engineering loop used by product companies and startups across India.

Typical Software Engineer interview rounds

1 Online assessment. Timed coding problems on arrays, strings and hashing on HackerRank or HackerEarth.
2 DSA / problem solving. 1–2 live coding rounds on data structures, algorithms and complexity analysis.
3 System design. Designing a scalable service (mid/senior); low-level design for early-career.
4 Hiring manager / culture fit. Past projects, ownership, behavioural questions and team fit.

Commonly-asked Software Engineer questions

Reverse a linked list, both iteratively and recursively.
Find the two numbers in an array that add up to a target sum.
Detect whether a linked list has a cycle.
What is the difference between a process and a thread?
Explain time and space complexity (Big O) with examples.
How does a hash map work internally, and what happens on collisions?
Find the longest substring without repeating characters.
What is the difference between an array and a linked list?

Full Software Engineer prep AI mock interview

General Sales / Business Development interview prep

8 live roles at Fastly

Pitching, objection handling, pipeline and targets — the sales / BD interview for SaaS, startups and inside-sales teams.

Typical Sales / Business Development interview rounds

1 Screening / fit. Motivation, communication and comfort with targets.
2 Role-play / mock pitch. Sell a product, handle objections, close.
3 Behavioural & track record. Past numbers, deals closed and how you hit quota.
4 Manager round. CRM, sales process and how you handle rejection.

Commonly-asked Sales / Business Development questions

Sell me this pen (or our product) right now.
Walk me through your sales process from lead to close.
How do you handle objections like 'it's too expensive' or 'we're happy with our current vendor'?
How do you qualify a lead — what makes it worth your time?
Tell me about the biggest deal you closed and how you did it.
How do you handle rejection and stay motivated?
What is your approach to cold calling or cold outreach?
How do you build rapport with a prospect quickly?

Full Sales / Business Development prep AI mock interview

General HR / Recruiter interview prep

3 live roles at Fastly

Sourcing, screening, HR fundamentals and stakeholder management — the HR / talent-acquisition interview for startups and enterprises.

Typical HR / Recruiter interview rounds

1 HR fundamentals. Recruitment lifecycle, labour basics and HR policies.
2 Sourcing & screening. Boolean search, evaluating resumes, conducting screens.
3 Behavioural / situational. Handling difficult hires, conflicts and stakeholders.
4 Manager round. Metrics, hiring strategy and culture.

Commonly-asked HR / Recruiter questions

Walk me through your end-to-end recruitment process.
How do you source candidates for a hard-to-fill role?
What is the difference between recruitment and talent acquisition?
How do you screen a resume in under a minute — what do you look for?
How do you handle a hiring manager who keeps rejecting your shortlists?
What recruitment metrics do you track (time-to-hire, offer-acceptance rate, etc.)?
How do you reduce candidate drop-off during the hiring process?
How do you conduct a behavioural interview and assess culture fit?

Full HR / Recruiter prep AI mock interview

General Digital Marketing interview prep

2 live roles at Fastly

SEO, performance ads, content and analytics — the digital marketing interview for agencies, startups and growth teams.

Typical Digital Marketing interview rounds

1 Fundamentals round. SEO, SEM, social, email and the marketing funnel.
2 Channel deep-dive. Your strongest channel — Google/Meta ads, SEO or content.
3 Analytics & case. Read a campaign's data and recommend optimisations.
4 Strategy & culture fit. Campaign planning, budgets and collaboration.

Commonly-asked Digital Marketing questions

What is the difference between SEO and SEM?
Explain the marketing funnel (awareness → consideration → conversion).
What is the difference between CPC, CPM, CPA and ROAS?
How do you measure the success of a digital marketing campaign?
What are the main Google ranking factors you optimise for?
Walk me through how you'd plan a campaign with a fixed budget.
What is A/B testing and how do you run one on an ad or landing page?
How do you reduce a high bounce rate on a landing page?

Full Digital Marketing prep AI mock interview

General Product Manager interview prep

2 live roles at Fastly

Product sense, analytical thinking, prioritisation and metrics — the PM interview for product companies, startups and consumer apps.

Typical Product Manager interview rounds

1 Product sense / design. Design or improve a product for a target user.
2 Analytical / metrics. Define success metrics, diagnose a metric drop, size a market.
3 Execution & prioritisation. Roadmaps, trade-offs and stakeholder management.
4 Behavioural / leadership. Past products shipped, conflict resolution and influence.

Commonly-asked Product Manager questions

How would you improve our product (e.g. WhatsApp, Swiggy, or our app)?
Design a product for [a specific user group, e.g. delivery riders or senior citizens].
What is your favourite product and why? How would you improve it?
Daily active users dropped 15% overnight — how do you investigate?
How would you decide what to build next with limited engineering resources?
What metrics would you track for a feature you just launched?
How would you estimate the market size for [a product] in India?
Walk me through how you'd prioritise a backlog of 20 feature requests.

Full Product Manager prep AI mock interview

General Accountant interview prep

1 live role at Fastly

Accounting principles, Tally, GST and financial statements — the accounting interview for finance teams, CA firms and SMEs in India.

Typical Accountant interview rounds

1 Accounting fundamentals. Double-entry, journal entries and the accounting cycle.
2 Statements & analysis. Balance sheet, P&L and cash-flow understanding.
3 Tax & compliance. GST, TDS and statutory basics (India).
4 Tools & scenario. Tally / Excel and a practical bookkeeping problem.

Commonly-asked Accountant questions

What are the three golden rules of accounting?
Explain the difference between accounts payable and accounts receivable.
What is the difference between a balance sheet and a profit & loss statement?
What is double-entry bookkeeping?
Explain the difference between cash accounting and accrual accounting.
What is depreciation and what are the common methods?
What is GST, and how do CGST, SGST and IGST differ?
What is TDS and when is it deducted?

Full Accountant prep AI mock interview

Rehearse your Fastly interview, free

Run a realistic AI mock interview for your target role and get instant feedback on your answers — or take a timed mock test to check your fundamentals before the real thing.

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Interview prep at other companies

Fastly interview — FAQs

How do I prepare for a Fastly interview?

Prepare by role: identify the role you're applying for, then practise the standard interview rounds and most-asked questions for that role type. Fastly is currently hiring for Software Engineer, Sales / Business Development and HR / Recruiter roles, so focus there. Use OnJob's free AI mock interview to rehearse with instant feedback, and review the role-specific question lists below. These are general role-based questions, not leaked Fastly questions.

What questions are asked in a Fastly interview?

We don't publish leaked or company-specific Fastly questions. What we do provide is the general, frequently-asked interview questions for the role types Fastly hires for — such as Software Engineer, Sales / Business Development and HR / Recruiter roles. For example, Software Engineer interviews commonly cover: Reverse a linked list, both iteratively and recursively. Find the two numbers in an array that add up to a target sum. Detect whether a linked list has a cycle. Prepare with these general questions and OnJob's free AI mock interview.

How many rounds does a Fastly interview have?

It depends on the role. A typical Software Engineer interview runs across 4 rounds — Online assessment, DSA / problem solving, System design, Hiring manager / culture fit. Round counts vary by company and seniority; treat this as the general structure to prepare for, not a guarantee of Fastly's exact process.

Is Fastly hiring right now?

Yes — Fastly has 48+ live openings on OnJob.io, refreshed daily, mostly for Software Engineer, Sales / Business Development and HR / Recruiter roles. Browse the live Fastly jobs and see your AI match score on each before you apply.

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