Anatolii
Pankratev

Backend engineer working with a small team of senior developers. We build systems where being wrong is expensive: wallets, payments, exchanges. Stack: PHP 8 / Symfony, Node.js / TypeScript, Go, PostgreSQL, Redis, Kafka, ClickHouse, Kubernetes, AWS. Recent work is under NDA, so no logos here: a double-entry wallet running casino and sportsbook at 3,000+ RPS, three years in production with no financial discrepancies; 10+ payment providers with routing, retries and daily reconciliation; matching engine and P2P components on a crypto exchange. What we take on: - Wallets, ledgers, settlement and reconciliation - Payment and PSP integrations, fiat and crypto - Exchange and trading backends - Performance work: profiling, slow queries, caching - Architecture and code audits before you commit budget - Taking over a codebase a previous team left unfinished We invoice in USDT or USDC, and prefer escrow on a first contract.

https://www.linkedin.com/in/anatoly-pankratyev/

Work experience

iGaming Operator (under NDA)

October 2024 – Current time

Job title

Tech Lead / Head of Backend

Work experience & achievements

Online casino and sportsbook, Curacao license, 100,000+ MAU, 3,000+ RPS at peak, multi-currency (fiat and crypto). - Lead 8 engineers across casino core, wallet and bonus engine; own the core-platform architecture. - Moving a monolith to event-driven services on Kafka and gRPC (Saga, Outbox, Idempotency). Domain services on PHP 8.2 / Symfony 6, latency-critical ones on Go: wallet hot path, RGS gateway, WebSocket hub. Critical API latency down 3x, availability above 99.95%. - Introduced Go as the platform's second backend language: standards, gRPC contracts, template service, training. - Built the observability stack (Prometheus, Grafana, Loki, OpenTelemetry, Jaeger) with SLO alerting. MTTR on critical incidents down ~60%. - Feature flags and blue-green deploys on Kubernetes (EKS): up to 5 releases a day, canary rollout, one-click rollback.

iGaming Operator (under NDA)

April 2023 – October 2024

Job title

Senior Backend Engineer / Backend Tech Lead

Work experience & achievements

- Wallet / PAM: multi-currency wallet (fiat and crypto), rollback-safe settlement, idempotency keys, daily reconciliation. Running since launch with no financial discrepancies. - Game integrations, direct and via aggregators, 1,500+ games. Designed one launcher / RGS contract on top of very different provider protocols, as a Symfony 6 service with an adapter per provider. - Bonus engine: free spins, deposit bonuses, cashback, wager conditions, promos segmented by cohort, geo and VIP tier. Product configures campaigns without a release. - Payments: 10+ PSPs (card acquiring, e-wallets, crypto USDT/USDC) with duplicate callbacks, timeouts, rollbacks and DLQ handled. Card approval rate up 12% after routing and retry tuning. - KYC / AML / anti-fraud pipelines and Responsible Gambling limits. - Redis and ClickHouse behind lobby and analytics: catalogue API under 50 ms at p95.

Rx2Go

April 2018 – April 2023

Job title

Senior Full Stack Developer

Work experience & achievements

Healthcare SaaS for e-prescriptions and medication delivery logistics in the US. HIPAA-regulated, with strict reliability, privacy and audit requirements around PHI and PII. - Owned the architecture of the core platform modules as it grew from a few thousand users to 100,000+. - Introduced a service-oriented architecture on top of the legacy monolith, extracting prescription, order and notification services behind REST and queues. - Optimized the backend (Laravel, PostgreSQL, Redis): response time on critical endpoints down 70%, database load cut in half. - Integrated external APIs (e-prescribing, pharmacy chains, notifications) under PHI/PII constraints, with encryption at rest and in transit and an audit log. Passed two external HIPAA audits. - Set up CI/CD and docker-based environments, introduced code review and unit / integration testing. - Mentored two mid-level developers and ran technical interviews.

Education

Not specified

Anatolii Pankratev

(0)

I will design or fix the double-entry ledger behind your wallet

$1,200

(0)

I will audit your PHP or Node backend and hand you a written plan

Web, Mobile & Software Dev

Back End Developer

Web Programming

$400

More info

Vector Exchange - spot and derivatives exchange

A spot and derivatives exchange rebuilt around a deterministic matching engine and a double-entry ledger: custody, risk, liquidations, market data and the trading clients on top of it. Under NDA, so there is no client name and no screenshots here. The image is our own illustration of the kind of screens involved, never a client interface. Case: https://ga-soft.com/portfolio/vector-exchange

Anchor Custody - multi-chain custody and withdrawals

Multi-chain custody: deterministic address derivation, threshold signing under policy, a sweep engine that survives chain reorganisations, and a withdrawal approval flow an auditor can follow end to end. Under NDA, so there is no client name and no screenshots here. The image is our own illustration of the kind of screens involved, never a client interface. Case: https://ga-soft.com/portfolio/anchor-custody

Relay Swap - one exchange engine, fourteen brands

One engine behind fourteen exchanger brands: rate aggregation across liquidity sources, order routing, address screening and a partner programme, with each brand running its own domain, pricing and payout rules. Under NDA, so there is no client name and no screenshots here. The image is our own illustration of the kind of screens involved, never a client interface. Case: https://ga-soft.com/portfolio/relay-swap

Sentinel Onboarding - KYC and AML pipeline

One KYC and AML pipeline for three regulated products: document and liveness verification across several vendors, sanctions and PEP screening, risk scoring, and the case queue the compliance team lives in. Under NDA, so there is no client name and no screenshots here. The image is our own illustration of the kind of screens involved, never a client interface. Case: https://ga-soft.com/portfolio/sentinel-onboarding

Kestrel Sportsbook - betting and casino platform

A sportsbook and casino platform: odds ingestion and pricing, bet settlement and cash-out, aggregation of sixty-odd game providers, and one ledger-backed wallet across five jurisdictions. Under NDA, so there is no client name and no screenshots here. The image is our own illustration of the kind of screens involved, never a client interface. Case: https://ga-soft.com/portfolio/kestrel-sportsbook

AnatoliiPankratev

Work experience

Education

Vector Exchange - spot and derivatives exchange

Anchor Custody - multi-chain custody and withdrawals

Relay Swap - one exchange engine, fourteen brands

Sentinel Onboarding - KYC and AML pipeline

Kestrel Sportsbook - betting and casino platform

Anatolii
Pankratev