CRM Integrations
- CRM synchronization
- Lead processing
- Data consistency
- Business automation
Open to backend, AI automation, and integration projects
Vladimir Fedorovykh
Open to Work · Available Immediately
Senior Backend Engineer
Building business systems, integrations and AI-powered automation.
CRM Integrations · Payments · ETL · AI Systems▍
Buenos Aires, Argentina [email protected]
// about
Building reliable backends and pragmatic AI tooling.
8+ years in backend software engineering, focused primarily on backend systems and integrations.
I build backend systems, integrations and automation tools used in real business operations.
My experience includes CRM integrations, payment processing, ETL pipelines, workflow automation and AI-powered document systems.
I have practical experience with AI coding assistants and OpenAI APIs, including Claude Code, Codex and Kimi Code.
- Experience
- 8+ Years
- Based in
- Buenos Aires, AR
- Focus
- Backend & Integrations
- Availability
- Remote Worldwide
// what i build
Backend systems that move real money and real data.
Areas I've shipped to production across business-critical backend systems.
Payment Systems
- Payment providers
- Billing workflows
- Reconciliation
- Transaction processing
ETL Pipelines
- Data extraction
- Data transformation
- Synchronization
- Automation
Workflow Automation
- Business processes
- Queues
- Background jobs
- Notifications
AI Document Processing
- RAG
- Embeddings
- Vector search
- Knowledge retrieval
API Integrations
- REST APIs
- Webhooks
- Third-party systems
- Data exchange
// featured project
Featured Project: Operations Platform for a US Service Business
Multi-service backend platform for a US service business in the funeral industry: CRM sync, payments, subscriptions, contractor workorders, live operations dashboards and integration automation.
Business purpose
Turn leads and payments into trackable field work.
System role
Operational backend connecting teams, customers and contractors.
Main value
Less manual coordination, cleaner data and faster fulfillment.
System scale
Multiple APIs, queues, jobs, webhooks and third-party systems.
Admin app
Customer portal
Contractor app
Core API
CS API
Contractors API
PostgreSQL
MongoDB
pg-boss
WebSockets
S3/CDN
Kommo
Stripe
Meshulam
Meta/Zapier
35%
system performance improvement
25%
REST API response-time reduction
90%
platform transactions handled by the payment service
Integrations
- Kommo CRM sync
- Stripe and Meshulam payments
- Zapier and affiliate event delivery
Automation
- Scheduled ETL jobs
- Order and subscription workorders
- Retryable queue processing
Backend APIs
- Admin operations API
- Customer-service API
- Contractor-facing API
LLM Workflows
- LLM workflow integration
- Chat automation
- Document and report workflows
main workflows
- CRM leads are synchronized from Kommo into the internal platform and normalized into customers, accounts and operational records.
- Orders and subscriptions move through payment providers, webhooks and reconciliation jobs before generating contractor workorders.
- Contractors receive workorders, update statuses and upload reports/photos while operations teams monitor live dashboards.
- Marketing and partner events are delivered through queued integrations to Meta CAPI, Zapier, FirstPromoter and Impact.
technical challenges
- Keeping CRM, payments, subscriptions, orders and contractor execution consistent across several external systems.
- Making webhook and scheduler flows idempotent so retries and backfills do not duplicate money, workorders or customer records.
- Supporting real-time operational visibility through WebSocket channels backed by PostgreSQL notifications.
- Separating public, customer-service and contractor APIs while sharing one domain model and database package.
Node.jsExpressTypeScriptPostgreSQLMongoDBSequelizepg-bosspg-listenSocket.ioStripeAWS S3OpenAILangChain
portfolio summary
Designed and developed backend services for a funeral operations platform that connected CRM, payments, subscriptions, contractor fulfillment, reporting and marketing integrations into one reliable workflow.
// stack
Technologies behind production backend systems.
Languages
- Node.js
- TypeScript
- JavaScript
Frameworks
- Express.js
- NestJS
Databases
- PostgreSQL
- MongoDB
- Redis
Messaging
- RabbitMQ
- pg-boss
Cloud
- AWS
- Docker
Testing
- Jest
Architecture
- Microservices
- REST APIs
- Event-Driven Systems
AI
- OpenAI APIs
- LangChain
- pgvector
- RAG
// experience
Backend systems, integrations and production business workflows.
2018 — 07/2026
Backend Developer · All Funeral Services
Built and maintained an operations platform for a US service business.
key contributions
- Developed CRM integrations and automated customer data synchronization.
- Built payment processing workflows and billing automation.
- Designed ETL pipelines for importing and synchronizing data between multiple systems.
- Developed backend services using Node.js, TypeScript, PostgreSQL, MongoDB and Elasticsearch.
1996 — 2018
Prior Engineering Career (Industrial Automation) · Severstal
// education
St. Petersburg State Mining Institute
Master's degree in Engineering, Electrical / Control / Automation.
1991 - 1996
// current interests
What I'm exploring right now.
AI-Assisted Workflow Automation
Using LLMs to automate operational workflows and document-heavy business processes.
Document Intelligence Systems
Building RAG pipelines, semantic search and knowledge retrieval solutions.
Data Integration & Synchronization
Designing reliable systems for moving data between CRMs, payment providers, third-party APIs and internal services while maintaining consistency, fault tolerance and data integrity.
Workflow Orchestration
Designing reliable background processing and long-running business workflows.
LLM Workflows
Practical LLM workflows that connect APIs, documents and business data with clear human oversight.
Developer Productivity
LLM-assisted development workflows, code generation and automation tooling.
// languages
Languages
Communication languages for remote engineering work and client collaboration.
English
Intermediate
Working proficiency for written technical communication and async collaboration.
Russian
Native or bilingual proficiency
Native-level communication for engineering, product and business discussions.
// contact
Contact
Best reached over email or whatsup
Email
[email protected]
LinkedIn
linkedin.com/in/vladimir-fedorovykh
WhatsApp
+54 911 7628-0598
Location
Buenos Aires, Argentina