Alex · CV
Editorial crop: a concrete corner split by a thin band of light.
Portugal · Remote

AI · Web3 · Distributed systems

Alex

Lead Full-Stack Engineer · Blockchain Architect · Fintech CTO

I design payment systems, self-custody infrastructure, and AI agents that are not allowed to sign until independent verification says they may. Backend first, product-aware — used to owning architecture across fintech, blockchain, and high-load platforms.

Portugal / Remote alex.saiwallet.ai
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Stack

  • TypeScript
  • Node.js
  • Redis
  • Docker
  • Kubernetes

01 / Founder · Platform

SAI Labs

CTO & Co-Founder · SAI Wallet · 11.2025 — Present

Non-custodial multichain AI crypto wallet. Product and technology strategy for an AI-native self-custody surface: unified balances, prepared transaction flows, and a zero-trust execution model.

Scope

Architecture, protocol design, MCP/agent orchestration, and the safety model that sits between model output and a signed transaction.

  • Unified balances across chains so the same token on different networks reads as one asset.
  • Cross-chain staking and swap infrastructure: routing and execution collapsed into a user goal and a prepared flow.
  • Proprietary MCP servers (demo) and an agent layer over the wallet — orchestration, not chat-only.
  • Three-step safety for AI actions: intent generation, anonymized independent verification, wallet-side validation. No single model output can authorize a sign.
GolangTypeScriptFlutterMCPLLM AgentsWeb3SolidityEVMTRONLayerZeroPostgreSQLDockerKubernetes
01 IntentModel proposes a transaction goal
02 VerifyIndependent, anonymized check
03 WalletLocal validation, then sign

Invariant: unsafe or unapproved actions are blocked before signing. Zero-trust execution — the LLM is a proposer, never an authority.

02 / Payments · Conversion

Aghanim Inc.

Lead Full-Stack Engineer · 05.2025 — Present

+5%conversion, new users vs Stripe tests
+2%conversion, previously paying users
1.5 mofrom start to outperforming Stripe

Payment processing and conversion optimization. Cascading providers, issuer-aware recovery, and routing that treats a decline as a signal rather than an end state.

Scope

Checkout architecture, provider orchestration, subscription geography, conversion analytics, and AI skills for reviewing code against migration and integration guidelines.

  • Delivered a payment flow that outperformed Stripe in conversion tests within 1.5 months.
  • Cascading processing across multiple providers; adaptive recovery from issuer and provider declines (AVS, mandated 3DS, card-scheme routing).
  • Card and PayPal subscriptions with region-specific flows, including India and Brazil.
  • Intelligent method routing from behavioral analysis and each user’s successful and failed attempts; analytics split first-time vs returning purchases.
Node.jsReactViteGolangPythonRustPostgreSQLPub/SubBigQueryMCP
01Intent
checkout
02Route
method / GEO
03PSP
cascade
04Decline
AVS · 3DS
05Recover
or settle

03 / Blockchain · Architecture

daGama

Architect, Blockchain Lead · 02.2024 — 05.2025

Blockchain-based payment system. Technical architecture and delivery for fintech, blockchain, and AI-native product work — microservices, multichain, and the SDKs that keep the frontend from speaking every chain dialect.

Scope

System design, Web3 services in Go, smart-contract audit and delivery, L2/L3, and a NestJS/NATS backend after the Express era.

  • Launched a chain payment system processing 10,000+ transactions per day.
  • Improved application performance by 40% through code and query work.
  • L2 and L3 on Arbitrum Rollup and AnyTrust; multichain TRON + EVM with unified frontend-to-backend SDKs.
  • Migrated the backend to NestJS with NATS; Apollo Federation; AI Vision / text / analysis services; LLM code-review in the repository.
GolangTypeScriptNestJSReactSolidityNATSgRPCApollo FederationPostgreSQLArbitrumTRONEVMKubernetes
tx path · 10k+ / day
  1. 01Client SDK — unified adapter, not per-chain UI
  2. 02NestJS / NATS — async fan-out, REST + gRPC edges
  3. 03Go Web3 services — EVM & TRON settlement
  4. 04L2 / L3 — Arbitrum Rollup · AnyTrust
  5. 05Contracts — Solidity, Hardhat, Ethers / Viem

04 / Product · Full-stack

SilentNotary

Full Stack / Blockchain Developer · UbiStake, UbixPay · 04.2023 — 02.2024

Ubix.Network operations, staking, analytics, and support. The work was a migration of an Express backend into NestJS services, plus the Vue surfaces that operations and users actually touch.

Scope

Backend refactor, staking APIs, admin and analytics services, support chat, and CI so hypotheses could run without contaminating production.

  • Optimized and refactored the Ubix.Network backend on Express; built the UbiStake staking backend on NestJS.
  • NestJS services for UbixAnalytics and for administering Ubix.Network operations.
  • Support-chat services with JIRA integration (NestJS + Vue) and Vue modules for UbiStake.
  • Cron automation for network interactions; CI/CD split into dev and feature environments for hypothesis testing.
Node.jsExpressNestJSWeb3VuePostgreSQL

Earlier

Xsolla · Full Stack Developer

Multiverse: minting collections, IPFS + AWS Lambda, S3. NFT collection factory and a royalty-capable standard, deployed to mainnet. React frontend; OpenAI API R&D. Express · React · Node.js · Solidity · Web3 · MongoDB · AWS.

FintechMe · Team Lead, Blockchain Developer

FintechMe Analytic and FTM Terminal: NestJS analytics and trading algorithms, Express payments, TradingView ingestion, OpenAI-driven analytics, React/Next.js apps, a C# trading terminal, token issuance and DEX listing. Led the web team. NestJS · Next.js · Solidity · PostgreSQL · MongoDB.

SR Solutions · Full Stack Developer

Bot-Adviser, SowaTrends: Express analytics and trading backends, Telegram bot and Laravel trading services, Python content generation, React/Next.js. Project manager and web team lead. Express · Python · PHP/Laravel · MySQL.

Freelance · Full Stack Developer

Web applications across backend, frontend, and database layers. PHP · JavaScript · Bootstrap · jQuery · MySQL · MSSQL.

Engineering Lab

Three small, complete decisions — not a skill dump. Pick a technology. The problem, the approach, the excerpt, and the limitation update together.

If the work should exist, write.

Architecture reviews, payment rails, self-custody, or an AI path that is not allowed to spend until it has been checked. Portugal / remote.

alex@sai-labs.pro GitHub LinkedIn alex.saiwallet.ai

Education — South Ural State University, Russia. IT Engineer.

Certification — Protect Personal Data, Including Encryption. South Ural State University.

Certification — Project Manager. GeekBrains.

Focus — Fintech: payments, financial analytics, trading systems, secure digital capital. Blockchain: self-custody, multichain, smart contracts, cross-chain infrastructure. AI-native: MCP, agent orchestration, LLM verification, safety-by-design.

© 2026 Alex Editorial CV · SAI Labs