AI-First Fullstack Engineer (Python + JS)

Codest Ltd. Company No. 12590542, VAT number: GB363431020; Polska; Hybrid; PLN 180,000 - 320,000; Full time

Job summary

The Codest is seeking an experienced Solution & Fullstack Engineer to join an AI-first engineering team building a cross-asset post-trade platform for a leading financial group in Japan. You will work across the stack with Python and Java on the backend and JavaScript on the frontend, shaping end-to-end solutions with ownership and architectural input.

Join a globally distributed team, experiment with AI-powered tooling, and contribute to scalable, high-quality software development while

Qualifications

• Advanced English communication skills for collaboration with international teams.
• 5+ years of commercial software engineering experience, preferably fullstack or backend.
• Strong experience with Python and frontend JS technologies.
• Deep PostgreSQL knowledge including design, queries, and optimization.
• Familiar with AI-assisted development tools and modern CI/CD practices.

Responsibilities

• Design, develop, and maintain end-to-end fullstack solutions using Python/Java and JavaScript.
• Build modern, responsive UIs and integrate with backend services and APIs.
• Develop scalable backend services, APIs, and application components.
• Own technical solutions from architecture to deployment.
• Collaborate with international teams to translate business needs into technical systems.
• Leverage AI-assisted tools to improve efficiency and code quality.

Skills

Python

JavaScript

PostgreSQL

English

CI/CD

REST APIs

AI tools

React

Vue.js

Angular

Tools

GitHub Copilot

Cursor

Claude Code

Docker

AWS

Linux

Job description

The Codest is seeking an experienced Solution & Fullstack Engineer to join an AI-first engineering team building a cross-asset post-trade platform for a leading financial group in Japan. You will work across the stack with Python and Java on the backend and JavaScript on the frontend, shaping end-to-end solutions with ownership and architectural input.

Join a globally distributed team, experiment with AI-powered tooling, and contribute to scalable, high-quality software development while