Fullstack Developer (Fintech)

TL;DR

Fullstack Developer (Node.js/React): Developing and maintaining a unified self-service platform for automated merchant onboarding within a high-growth fintech ecosystem with an accent on scalability and third-party API integrations. Focus on replacing fragmented tools with an integrated solution to improve partner experience and operational alignment.

Location: Warsaw, PL

Company

A global fintech company providing unified payment infrastructure and financial services for merchants and consumers worldwide.

What you will do

• Collaborate cross-functionally with Business Analysts and QA to deliver elegant solutions that satisfy business goals.
• Develop and maintain the Global Merchant Application to streamline automated merchant onboarding.
• Apply software engineering best practices and utilize unit testing to ensure high delivery quality.
• Diagnose and resolve issues in deployed systems by engaging with support personnel and customers.
• Participate in technical grooming and requirements gathering/validation sessions.

Requirements

• 5+ years of experience in web application development using Node.js and React.
• Proven experience integrating third-party APIs and managing relational databases (PostgreSQL, MSSQL).
• Proficiency with observability tools such as DataDog, Sentry, and AWS CloudWatch.
• Strong understanding of RESTful APIs and practical knowledge of Agile SDLC (Scrum/Kanban).
• Ability to lead technical analysis and coordinate communication across multiple teams.
• Fluent English (written and spoken).

Nice to have

• Experience with Salesforce integration.
• Advanced knowledge of AWS services.

Culture & Benefits

• Opportunity to work on one of the company's top priority projects during a period of extremely fast growth.
• Collaborative environment focused on elevating technology and consistently applying best practices.
• Engagement with a global team building a unified, scalable platform for international markets.