Solution & Fullstack Engineer (Python/Java & JS) – AI First

About the role

Codest Ltd. is seeking a Solution & Fullstack Engineer to join an AI‑first engineering team building a cross‑asset post‑trade execution platform for a leading Japanese financial group. You will work on both backend (Python and Java) and frontend (JavaScript with modern frameworks) to deliver high‑performance banking applications.

Key responsibilities

• Design, develop and maintain end‑to‑end fullstack solutions using Python or Java on the backend and JavaScript on the frontend.
• Build responsive user interfaces with React, Vue.js or Angular and integrate them with backend APIs.
• Develop scalable backend services, APIs and PostgreSQL database structures, queries, functions, triggers and views.
• Leverage AI‑powered development tools (e.g., GitHub Copilot, Cursor, Claude Code) to improve code quality and delivery speed.
• Participate in technical planning, architecture discussions, code reviews and testing.
• Collaborate with international cross‑functional teams to translate business needs into technical solutions.

Required profile

• Advanced English communication skills.
• 5+ years of commercial software engineering experience, preferably fullstack or backend‑focused.
• Strong experience with Python (or Python & Java) and JavaScript.
• Solid understanding of fullstack architecture, REST APIs and distributed systems.
• Experience with PostgreSQL database design and optimization.

Required skills

• Python
• Java
• JavaScript
• React, Vue.js, Angular
• PostgreSQL
• AI‑assisted coding tools (GitHub Copilot, Cursor, Claude Code)
• CI/CD pipelines
• Docker
• AWS
• TypeScript
• Linux

What we offer

• PLN 18,000 – 26,000 per month on a B2B contract.
• 100% remote work with occasional meet‑ups at our Krakow or Warsaw offices.
• Opportunity to influence technical decisions and work with cutting‑edge AI‑first development practices.