Hand-inked manga-style drawing of Andrey: a man with dark brown shoulder-length hair and a short beard, white shirt, arms crossed, smiling, in front of a yellow comic burst on torn paper.

Andrey LitvinovSenior Backend DeveloperSoftware ArchitectTeam Lead

FinTech · Payments · Trading · Digital Assets

I design and build backend systems from architecture to production — and lead the teams that ship them.

Target roles: Senior Backend Developer · Software Architect · Tech Lead · Backend Team Lead · CTO-track roles

Remote

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50 seconds on how I work

A motion-design profile. Sound on is optional; it works muted.

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Transcript: the on-screen text, in order

0:00Senior Backend Developer. Software Architect. Team Lead. FinTech · Payments · Trading · Digital Assets.
0:05Payments. Trading. AML / KYC. Digital Assets.
0:07Payment & Wallet Platform — Software Architect / Team Lead. Wallet + payments platform, exchange via external providers + liquidity sources.
0:10Designed the operation lifecycle: created → status → failure → retry → confirmed.
0:12Owned the backend architecture. .NET Core microservices. Dapr workflows, Redis, RabbitMQ, PostgreSQL.
0:15Led developers, DevOps & QA in an Agile workflow.
0:17Forex & CFD Broker Platform — Architect · Team Lead · Sr Backend. Legacy services: limited or missing documentation.
0:20Legacy → .NET Core, Go. Took part in migrating old services.
0:22Payment gateway: many deposit + withdrawal methods. AML checks: addresses · transactions · payment risk. Collectors: detect + collect incoming digital assets.
0:25Wrote production code → then architect & team lead.
0:27Digital Asset Exchange — Senior Backend Developer. Unstable provider APIs. Rate limits. Different market-data formats.
0:30Market-depth service: order books from multiple CEX providers. Order execution & status handling.
0:32AML provider checks. Logging, retries, error handling.
0:35Hands-on lead: stays close to architecture and code.
0:37Agile teams of 5+: backend, frontend / mobile, QA, DevOps.
0:40Code review, task decomposition, mentoring, sprint planning. AI / LLM-assisted engineering: Cursor · OpenCode · agent workflows.
0:42Senior Backend Developer. Software Architect. Team Lead. FinTech · Payments · Trading · Digital Assets. Read the full resume.

Hands-on lead

I stay close to architecture and code.

Hands-on engineering plus technical leadership: I write production code, review code, decompose tasks, mentor developers, improve engineering practices and lead delivery.

My leadership style is hands-on: I stay close to architecture and code, help with difficult implementation details, investigate production issues, and still keep team delivery under control.

Main domains

FinTech
Payments
Trading Systems
Digital Asset Infrastructure
AI/LLM-Assisted Engineering

Languages

Russian — native
English — professional working proficiency

Selected work

01 · Payment & Wallet Infrastructure Platform
02 · Forex & CFD Broker Platform
03 · Digital Asset Exchange / Trading Platform

Payment & WalletInfrastructure Platform

Software Architect / Team Lead

Problem

A wallet and payment infrastructure platform with exchange functionality through external providers, liquidity sources and cross-chain infrastructure.

Contribution

Owned the backend architecture for the direction
Designed it on .NET Core microservices
Built APIs, workflow services, exchange orchestration and provider integration layers
Designed the operation lifecycle (creation → statuses → failures → retries → confirmations, external events)
Integrated external exchange providers, liquidity sources and blockchain infrastructure
Led developers, DevOps and QA in an Agile workflow
Code review, task decomposition, sprint planning, delivery planning, production readiness

Designed the operation lifecycle

Architecture sketchbook · 1/3

Operation lifecycle: creation → statuses → failures → retries → confirmations, external events.

Hover, tap or tab through the sketch.

Owned the backend architecture for the direction

Stack in context

.NET Core
Dapr workflows
Redis
RabbitMQ
PostgreSQL

Forex & CFDBroker Platform

Software Architect / Team Lead / Senior Backend Developer

Problem

Legacy services with limited or missing documentation.

Took part in migrating old services

Architecture sketchbook · 2/3

Legacy services → a modern stack on .NET Core and Go.

Hover, tap or tab through the sketch.

Contribution

Analysed the legacy services
Took part in migrating old services to a modern stack on .NET Core and Go
Designed and implemented a payment gateway with multiple deposit and withdrawal methods
Built AML services for address, transaction and payment risk checks
Built collector services that detect, process and collect incoming digital assets
Wrote a significant amount of production code before the team expanded, later acted as architect and team lead (code review, technical decisions, task planning, quality control)

Stack in context

.NET Core
Go
Clean Architecture
PostgreSQL
Redis
Airflow
EF Core

Digital Asset Exchange/ Trading Platform

Senior Backend Developer

Problem

Unstable provider APIs
rate limits
different market-data formats
operational edge cases

Contribution

Backend APIs for exchange flows, user operations and internal services
AML provider integrations (address, transaction, risk-score checks)
A market-depth service that synchronises order books from multiple CEX providers
Trading services for order execution, status handling and provider-specific logic
Reliability through logging, retry logic, error handling, service decomposition and production support

Market-depth service: order books from multiple CEX providers

Architecture sketchbook · 3/3

Several exchanges feed one order-book column. A schematic, not real market data.

Hover, tap or tab through the sketch.

Stack in context

Node.js
TypeScript
Go
PostgreSQL
Redis
Trading and AML APIs

Also

Trading Automation & DeFi Infrastructure — Senior Developer

Arbitrage and trading bots with liquidity pools and DEXs, smart-contract integration, gas optimisation, token-launch mechanics.

Node.js · TypeScript · Rust · Solidity · Web3

Agile teams of 5+

Backend
Frontend / Mobile
QA
DevOps

Experience leading Agile engineering teams of 5+ people: backend developers, frontend/mobile developers, QA engineers, DevOps specialists.

Practices

Task decomposition and technical planning
Sprint planning, backlog refinement, delivery tracking
Code review and engineering quality control
Mentoring
Architecture decisions and technical ownership
Coordination across backend, frontend/mobile, QA, DevOps, product and business stakeholders
Release planning and production readiness
Investigation of complex technical issues, legacy systems, unstable integrations and production incidents

Engineering toolbox

Grouped by purpose. Pick a case file to see what was used there.

Backend

Architecture

CQRS
DDD
MediatR
REST
gRPC
Event-driven

Data & messaging

ClickHouse
MongoDB
RavenDB
SQL Server
Dapr pub/sub
Background and scheduled jobs

Observability & infra

Docker
Grafana
Prometheus
Loki
OpenTelemetry
Vault

Fintech / digital assets

Payment APIs
AML/KYC APIs
Trading and market-data APIs
CEX/DEX integrations
EVM
Uniswap V2/V3
Thorchain

Frontend / mobile (secondary)

React
Redux
Next.js
Vue.js
Flutter
BLoC

Testing

xUnit
Jest

AI / LLM-assisted engineering

Cursor · OpenCode · agent workflows

AI-assisted development with Cursor, OpenCode and similar tools
LLMs for code analysis, refactoring, documentation, research and boilerplate
Agent-based workflows for task decomposition, implementation planning and engineering automation
Local LLMs and API-based providers
Focus on developer productivity and engineering process

Hand-inked drawing of Andrey pointing straight at the viewer, white shirt, in front of a yellow comic burst with red and turquoise paint strokes.

Let's talk

Open to Senior Backend, Architect, Tech Lead and CTO-track roles.

Email: helloanlitv.cloud
LinkedIn: linkedin.com/in/litvinov-andrey