Senior Backend Engineer

Please, follow FitNext LinkedIn page: https://www.linkedin.com/company/fitnext-consulting/ *

Following

LinkedIn URL profile *

Country of residence *

Github Link *

What is your expected rate per month in USD? *

English Level *

A1: Beginner
A2: Basic
B1: Intermediate
B2: Advanced Intermediate
C1: Advanced
C2: Proficient

How many years of professional experience do you have building backend applications with TypeScript and Node.js? *

No professional experience
Less than 1 year
1–2 years
More than 2 , up to 5 years
More than 5 years

Which backend responsibilities have you handled in production? (Select all that apply) *

Building and maintaining REST APIs
Integrating third-party APIs or services
Designing relational databases and optimizing SQL queries
Implementing authentication, authorization, and security controls
Writing automated tests
Troubleshooting production issues and monitoring services
None of the above

Which best describes your experience using AI coding assistants such as Claude Code, Cursor, or GitHub Copilot? *

I regularly use them for development, debugging, and refactoring, reviewing and testing the generated code
I occasionally use them for code suggestions or specific development tasks
I have experimented with them, but not in professional projects
I use AI chat tools, but not for coding
I have no experience using AI assistants

4. Which areas have you worked with professionally? (Select all that apply) *

Cryptocurrency, blockchain, or digital asset platforms
Stablecoins, settlement, or cross-border payments
Other fintech, banking, payment, or trading platforms e
Distributed systems, message queues, or event-driven architectures
Transaction processing, idempotency, or reconciliation
Cloud infrastructure, Docker, or CI/CD pipelines
None of the above

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