Senior Full-Stack Engineer (React/Node.js)

Resourceful Talent Group; Warszawa; Remote; PLN 550,000 - 707,000; Full time

Job summary

Resourceful Talent Group is seeking a Senior Full-Stack Engineer for a fully remote role operating on EST hours. You will leverage strong React/TypeScript frontend and Node.js/TypeScript backend expertise to build production-grade applications in a fast-paced fintech environment.

The role requires 7+ years of experience, true full-stack capability, and hands-on PostgreSQL with migrations. Prior AWS production experience (ECS/Fargate, S3, CloudFront) and comfort with AI coding tools like Claude

Qualifications

• 7+ years of professional software engineering experience.
• Strong, recent React, Node.js, and TypeScript experience.
• True full-stack expertise; frontend-only candidates will not be considered.
• Hands-on PostgreSQL experience, including migrations and indexing.
• Production experience with AWS; ECS/Fargate, containers, S3, and CloudFront preferred.
• Experience with system design, third-party integrations, and end-to-end testing.
• Comfortable using AI coding tools such as Claude.
• Strong English and Russian communication skills.
• Fintech or payments experience preferred (ACH, reconciliation, compliance, idempotency).

Responsibilities

• Build and maintain production-grade React, Node.js, and TypeScript applications.
• Develop backend services, APIs, integrations, and server-side validation.
• Manage PostgreSQL schemas, migrations, queries, indexes, and performance.
• Write unit, integration, and end-to-end tests.
• Design scalable systems using caching, queues, and background jobs.
• Improve legacy code and contribute to ongoing technical remediation.
• Collaborate with the team and clearly communicate technical decisions.

Skills

React/TypeScript

Node.js/TypeScript

Full-stack engineering

AWS

PostgreSQL

AI coding tools (Claude)

Fintech domain knowledge

English/Russian communication

Tools

AWS ECS/Fargate

S3

CloudFront

PostgreSQL migrations/indexing

Job description

Senior Full-Stack Engineer

About the Role

We are looking for Senior Full-Stack Engineer with strong experience across React/TypeScript frontend development and Node.js/TypeScript backend systems. This is a long-term, fully remote opportunity within a fast-moving fintech environment, working EST hours.

The ideal candidate is proactive, asks thoughtful questions, and builds reliable, maintainable systems. The team actively uses AI coding tools such as Claude, so candidates must be comfortable using them and explaining their technical decisions.

Responsibilities

• Build and maintain production-grade React, Node.js, and TypeScript applications.

• Develop backend services, APIs, integrations, and server-side validation.

• Manage PostgreSQL schemas, migrations, queries, indexes, and performance.

• Write unit, integration, and end-to-end tests.

• Design scalable systems using caching, queues, and background jobs.

• Improve legacy code and contribute to ongoing technical remediation.

• Collaborate with the team and clearly communicate technical decisions.

• 7+ years of professional software engineering experience.

• Strong, recent React, Node.js, and TypeScript experience.

• True full-stack expertise; primarily frontend candidates will not be considered.

• Hands-on PostgreSQL experience, including migrations and indexing.

• Production experience with AWS; ECS/Fargate, containers, S3, and CloudFront are preferred.

• Experience with system design, third-party integrations, and end-to-end testing.

• Comfortable using AI coding tools such as Claude.

• Strong English and Russian communication skills.

• Fintech or payments experience is preferred, including knowledge of ACH, reconciliation, compliance, and idempotency.