Proven commercial experience
Not on paper, but real commercial experience with the required stack, proven on real products.
Our vetting process in details
We reveal some of the magic that turns thousands of candidates into 1.2% of the chosen ones, ready to make your next project a blast.
Tough vetting by us –
smooth & fast hires for you
Pre-screening
CV and LinkedIn review, a screening call with our AI assistant, and a role-specific technical task.
~37%
Recruiter interview
Assesses interpersonal skills, pressure handling, ambiguity, and client expectations. If earlier stages sufficed, we skip to the technical interview.
~17%
Technical interview
A live problem-solving session with a trusted senior engineer from our community. We assess thinking, tradeoffs, and AI use. Peer cross-reviewed.
~7%
Listed on Lemon.io
Roughly 1 in 100 applicants makes it to the platform with every skill, stack, and work style validated, organized, and ready for clients to act on.
~1%
Vetted developers are waiting for your request. Hire in-house or on contract. Zero complexity either way.
What matters for us
When we say "top vetted developers" we mean it
Since 2015, we've screened thousands of candidates to learn what separates strong performers from good interviewees. Our AI assistant handles pre-screening, freeing our engineers and recruiters to focus where it matters most: evaluating how top candidates think, communicate, and perform under pressure.
Fluent English and effective communication
We test communication skills, starting from small talk to complex collaboration role-playing.
Self-management and responsibility
Our screening is intense, packing many touchpoints into a short window, and candidates who miss commitments are screened out.
AI-augmented problem solving
We test how developers use AI: what they delegate, validate, and own. Treating AI as a crutch or a way to dodge accountability is a dealbreaker.
How it works
Tech interviews designed to spot the right talent
The most important is HOW we vet and this is the part we take pride in. Just have a look at our technical interview.
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1
Small talk
Yep, it’s not just a warm-up — developers who can’t hold a casual convo don’t pass. We prioritise communication as it’s key to problem-solving, not just closing tickets.
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2
Experience dive
We assess how candidates chose tools and tackled real challenges. Can they: ship impactful upgrades, collaborate effectively, handle legacy code.
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3
Non-googleable theory check
We open with tricky, non-googleable questions to test real knowledge, then cover core theory (data types, function internals, framework differences), and verify candidates have applied it in practice.
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4
Practice challenge
That’s the best part where we throw real problems their way, like system design, live coding, code review and many more.
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5
AI-assisted development
We watch how they reach for AI — or don’t. What we’re looking for is judgment: knowing when to use AI, what to hand off, and when to keep full control.
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6
“Passion for tech” screening
We want to know: the latest tech they’re using, how they keep their skills sharp, what resources they use, and the cool stuff they’ve brought to their last projects.
Behind the vetting
Sounds too good to be true?
There are things we might compromise on, but it’s never about the critical quality markers. Some of the real-life challenges we encounter:
Not enough time on interview
We adopt a “less theory, more practice” approach to spot more potential gaps on practical problems and save time on just checking theory.
Too many skills to validate
We can’t test every skill in CV, so we validate and show the core stack. Extra skills get a per-project interview on request.
Uncertain feedback from an interviewer
Interviewers are human, so if feedback isn’t clear-cut, we ask another specialist for a second opinion on the same stack.
Dealing with “not a small talk guys”
We give strong candidates a chance even if small talk isn’t their thing. Clients sometimes reject great fits for seeming awkward or shy, so we help those devs prepare for interviews.
Meet our technical interviewers
A Yale graduate leading ML research at Northwestern, with 10+ years across AI and systems engineering — pairing academic depth with hands-on work to assess AI and backend candidates.
7+ years building production AI systems across multi-agent architectures, LLM pipelines, computer vision, and NLP — giving Oluwatosin a sharp eye for strong AI and backend engineers.
A full-stack and AI engineer with 6+ years in fintech, real-money gaming, and AI products, plus 7 Lemon.io projects — Kriss assesses with a product-driven, production-grounded eye.
10+ years across gambling, enterprise, and SaaS, including Atlassian — plus 500+ Lemon.io interview hours and a tutoring background. Greg reads both technical depth and how candidates think under pressure.
Across Google, Bloomreach, and his own Pioneer-backed startup, Christos has run 700+ server fleets and 300-node Kubernetes clusters in production — a ground-level read on strong infrastructure engineering.
9+ years designing digital products across SaaS, fintech, travel, and real estate — Senior Designer at Kiwi.com, 13 Lemon.io projects shipped. Anton spots weak product decisions instantly with a data-driven, user-first lens.
A versatile engineer across Kotlin, Go, PHP, and blockchain — as at home on a conference stage as in a code review. With 500+ interview hours on our platform, Dmytro brings technical rigour and a sharp evaluator's eye.
1,000 interview hours on our platform set Denys apart. Backed by 12+ years across distributed systems, cloud-native backends, and full-stack development, he screens full-stack and mobile candidates with rare calibration.
A full-stack engineer with 8+ years across fintech, SaaS, and high-traffic platforms — including one serving millions. With 11 Lemon.io projects, Alla brings sharp real-world instincts to candidates across many stacks.
10+ years across investment banking, enterprise SaaS, and AI products, including Citi Bank and Clutch. Deep Java/JavaScript roots and a growing AI focus mean Halil knows exactly what to look for in candidates.
Frontend architecture, mentorship, and 7+ years across e-commerce and platform products — including Jiji, one of Nigeria's biggest. Ivan reads TypeScript and Vue.js depth with a tutor's instinct for genuine vs. surface-level expertise.
An engineering manager and full-stack engineer with 10+ years across luxury e-commerce, AI platforms, and high-scale infrastructure, including Farfetch and Reflaunt. With 700 interview hours on our platform, Vitalii evaluates candidates with true rigour.
Why trust us
Why we trust our interviewers and you can, too
Mature skilled team
Our interviewers are senior engineers and tech leads with hundreds of interviews and successful projects with Lemon.io behind their back.
Quality control and peer-reviews
We do regular performance checks and process feedback, while interviewers handle peer-reviews and knowledge sharing inside the community.
Reverse engineering
Our interviewers own outcomes: every failure is investigated, traced to its vetting stage, and fixed so it never repeats.
Unified approach to evaluation
To keep assessments fair despite human subjectivity, we rely on strict scorecards, evaluation sheets, and unified skill criteria.
What Lemon.io clients have to say
7 developers hired in 24 hours
The developers helped us speed up. They quickly learned their part of the app and we’re grateful for their contribution.
Start to finish in under a week with zero wasted time
Reached out on Monday evening, connected Tuesday morning, had four qualified candidates by Wednesday.
High quality, well-qualified developers
We had an excellent experience. Process is fast from the initial intake through setting up payment.
Ready-to-interview vetted developers are waiting for your request
We’ve been iterating our screening processes and strengthening the team since 2015. Believe it or not, we know how to make your next hire a success.
