Sergii

From United States (UTC-4)

Full-stack Web Developer|Middle-to-senior

Back-end Web Developer|Middle-to-senior

Skills and seniority verified on Oct 7, 2026

Sergii – React, Typescript, AWS

Sergii is a middle-to-senior full-stack engineer with 10 years of experience in Node.js, TypeScript, React/Next.js, PostgreSQL, and AWS. He has led backend architecture and CRM integrations, shipped production AI features, and contributed to both startups and large-scale SaaS platforms. Strengths include backend design, integration, and AI workflow automation.

10 years of commercial experience in

Fintech

Human resources

Sales

B2B

CRM

SaaS

Mental wellness

Agentic automation

Main technologies

React

10 years

Typescript

8.5 years

AWS

8.5 years

Node.js

8.5 years

SQL

10 years

Additional skills

n8n

Next.js

LangGraph

Amazon SQS

OpenAI

Amazon RDS

Amazon S3

GitHub Actions

DynamoDB

AWS Lambda

PostgreSQL

API Gateway

Claude Code

Python

Amazon EC2

Nest.js

CloudWatch

LLM integration

JavaScript

RAG

Direct hire

Possible

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Experience Highlights

Keep in mind, the experience summary might exclude non-relevant projects

Languages

Russian

Advanced

Ukrainian

Advanced

English

Advanced

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