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Marcus Chen

L4 · Evidence verified

Fintech fraud & payments risk consultant

Singapore, SG · speaks EN, ZH

4.7★ (15)Replies in ~12h● Accepting requests100% completion100% repeat buyers

About

Built fraud prevention for two unicorn fintechs. Specializes in real-time payments risk, chargeback mitigation, and ML-based fraud scoring. Available for paid advisory calls and project work.

Expertise

Fintech Fraud96%Payments Risk90%Machine Learning60%

Proof Vault2 verified

Reduced fraud losses 62% at a top-5 SEA fintech
Project
Certified Fraud Examiner (CFE)
Certification

Match & Trust breakdown

Why this expert ranks the way they do — the engine is deterministic and fully explainable.

Verification10.7 / 16 pts

Verification level 4 of 6.

Availability11.7 / 12 pts

Accepting requests · available this week · typically replies in ~12h (faster replies earn the remainder)

Reviews11.3 / 12 pts

4.7★ across 15 reviews.

Languagequery-dependent · up to 8 pts

enzh

Earns up to 8 pts when a query requires a language you list.

67Trust

Query-independent trust — used to break ties between equal match scores.

Verification33 / 50

Verification, availability, reviews and evidence (44 pts) are this expert's standing on every query. Topic relevance (36), semantic fit (6) and location (6) are scored per query; language (8) depends on the query's requirement.

How matching works

The 100-point match budget: Topic relevance 36 · Verification 16 · Availability 12 · Reviews 12 · Language 8 · Semantic fit 6 · Location 6 · Evidence depth 4. Deterministic — no black box; the same profile always scores the same.
Verification (16 pts): Your trust level L0 (self-declared) to L6 (board certified) scales linearly: points = level ÷ 6 × weight. Levels are set by reviewers from evidence — never self-assigned.
Availability (12 pts): Accepting requests earns 40%, being available this week 30%, and response speed the final 30% (a one-week response time earns none of it). Urgent queries additionally discount experts who aren't available now.
Reviews (12 pts): Your average rating, confidence-weighted by volume — full confidence at 5+ reviews. No reviews is scored as neutral, never a penalty.
Language (8 pts): Full points when the query's required languages are all in your list; neutral when a query has no language requirement.
Trust (0–100, on every query): Verification 50 · review confidence 25 · verified evidence 15 (5 proofs = full) · marketplace reliability 10 (5 completed engagements = full). Trust breaks ties between equal match scores.

Verification history

How the L0–L6 trust ladder works →

✓
Evidence verifiedL46/11/2026
Evidence reviewed
via reviewer
✓
Affiliation verifiedL35/17/2026
via reviewer
✓
Contact verifiedL14/22/2026
via reviewer

Reviews

★★★★★
— Jordan Buyer

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Booking FAQ

How do I book Marcus Chen?

Pick a service on this page and request a booking (or send an inquiry first). Once Chen accepts, you pay into escrow and the session is confirmed.

How does payment work?

Prices are listed per service — no hidden fees for buyers. Payment is held in escrow when you book and released to the expert only after the engagement completes.

What if the session doesn't happen?

Escrow protects you: if a booking is cancelled or declined, the payment is refunded. See the Refund Policy for details. Refund Policy

How fast will I get a response?

Marcus Chen typically replies within ~12 hours. You'll be notified as soon as they respond.

What languages can the engagement be in?

Chen works in: EN, ZH.

What does the verification level mean?

Every expert carries a reviewer-assigned trust level from L0 (self-declared) to L6 (board certified), based on verified evidence — publications, credentials, affiliations. Levels are never self-assigned, and the platform blocks any grant whose minimum evidence isn't on file.