Senior Full Stack Engineer — React + Python (FinTech)

OANDA Corporation; Kraków; Hybrid; PLN 220,000 - 300,000; Full time

Job summary

OANDA Corporation in Kraków is seeking a Senior Software Engineer to design and implement onboarding forms and registration workflows using React.js and Python (FastAPI). You will lead architectural decisions, coordinate API integrations, and deliver features end-to-end in a hybrid Cracow environment.

You will collaborate with cross-functional teams in English, maintain code quality with SOLID and Clean Code, and mentor peers while adopting modern tooling and AI-assisted workflows.

Qualifications

• Extensive commercial experience as a Full Stack Developer with React.js and Python (FastAPI).
• Experience in system design and cloud environments (GCP preferred).
• Proven experience with third-party vendor API integrations (identity verification, payments, e-sign).
• Strong testing skills (PyTest, Cypress, Playwright) and CI/CD.
• Strong English communication (C1) for cross-team collaboration.
• Autonomy, ownership, and mentoring abilities.
• Knowledge of Domain-Driven Design and IaC (Terraform).

Responsibilities

• Drive architecture and build onboarding forms using React.js and Python.

Skills

React.js

Python

FastAPI

English (C1)

CI/CD

PyTest

Cypress

Playwright

DDD

IaC

Tools

Google Cloud Platform

Terraform

Job description

OANDA Corporation in Kraków is seeking a Senior Software Engineer to design and implement onboarding forms and registration workflows using React.js and Python (FastAPI). You will lead architectural decisions, coordinate API integrations, and deliver features end-to-end in a hybrid Cracow environment.

You will collaborate with cross-functional teams in English, maintain code quality with SOLID and Clean Code, and mentor peers while adopting modern tooling and AI-assisted workflows.