CareerPlan

Senior Software Engineer (React.js, Python)

Krakow, PLFull-time2026-11-02 → 2026-11-10
Hybrid

Core

Design, build, and maintain dynamic onboarding forms and registration workflows for a seamless, secure client onboarding experience.

Role type

Senior Full Stack Software Engineer

Builds

Registration flows and onboarding forms used by clients

Domain

FinTech / Online Trading

Required skills

React.js, Python (FastAPI), System Design, Cloud Environments (GCP), Third-party API Integrations, Automated Testing (PyTest, Cypress, Playwright), CI/CD, Domain-Driven Design, Infrastructure as Code (Terraform), AI Developer Tooling

Preferred skills

FinTech commercial background, AI-driven development experience

Technologies

React.js, Python, FastAPI, Google Cloud Platform, Terraform, PyTest, Cypress, Playwright, Claude Code

Responsibilities

Drive architecture and design of onboarding forms; Oversee third-party vendor service integrations; Independently own features end-to-end; Lead team technical discussions and mentor engineers; Champion modern developer tooling integration

Seniority

Senior, hands-on IC with mentorship