Solution&Fullstack Engineer (Python+ JS) - AI First

🌍 Hello World!

We are The Codest - International Tech Software Company with tech hubs in Poland delivering global IT solutions and projects. Our core values lie in “Customers and People First” approach that prioritises the needs of our customers and a collaborative environment for our employees, enabling us to deliver exceptional products and services.

Our expertise centers on web development, cloud engineering, DevOps and quality. After many years of developing our own product - Yieldbird, which was honored as a laureate of the prestigious Top25 Deloitte awards, we arrived at our mission: to help tech companies build impactful product and scale their IT teams through boosting IT delivery performance. Through our extensive experience with product development challenges, we have become experts in building digital products and scaling IT teams.

But our journey does not end here - we want to continue our growth. If you’re goal-driven and looking for new opportunities, join our team! What awaits you is an enriching and collaborative environment that fosters your growth at every step.

We are currently looking for a Solution&Fullstack (Python+ JS) - AI First.

💡Project Description

We are looking for an experienced Solution &Fullstack Engineer to join an innovative, AI-first engineering team working on solutions for a leading financial group in Japan.

You will contribute to the development and evolution of a banking application serving as a cross-asset post-trade execution platform. The platform integrates with third-party services for trade matching and settlement, processes large volumes of financial data, and provides functionalities such as Trade Blotter and position reporting.

In this role, you will work across the entire application stack, combining strong backend engineering skills in Python or Python & Java with frontend development using JavaScript and modern frontend frameworks.

As a Solution Engineer, you will go beyond traditional software development, taking ownership of end-to-end solutions, contributing to architectural decisions, and translating business requirements into scalable, efficient technical implementations.

The project follows an AI-first engineering approach, where AI-powered development tools, coding assistants, and modern automation solutions are actively incorporated into everyday engineering workflows to accelerate development, improve code quality, and support innovative problem-solving.

You will have the opportunity to influence technical decisions, experiment with emerging technologies, and contribute to building modern, high-quality software solutions.

📈 Your Responsibilities

Designing, developing, and maintaining end-to-end fullstack solutions using Python or Python & Java on the backend and JavaScript on the frontend

Building and enhancing modern, responsive user interfaces and integrating them with backend services and APIs

Developing scalable backend services, APIs, and application components

Taking ownership of technical solutions, from requirements analysis and architecture design through implementation and deployment

Working with PostgreSQL, including designing and optimizing database structures, queries, functions, triggers, and views

Leveraging AI-powered development tools and AI-assisted coding practices to improve development efficiency, code quality, and delivery speed

Exploring opportunities to incorporate AI-driven automation and innovative solutions into engineering processes

Building rapid prototypes, validating technical concepts, and delivering solutions in a fast-paced environment

Participating in technical planning, solution design, testing, code reviews, and architectural discussions

Collaborating closely with cross-functional, international teams to translate business needs into effective technical solutions

Identifying opportunities for continuous improvement, automation, and technical optimization

Promoting engineering best practices, clean code, maintainability, and modern software development standards

Requirements

🔑 Key Requirements

Advanced English communication skills, both written and spoken, for collaboration with international clients and teams

5+ years of commercial experience in software engineering, preferably in fullstack or backend-oriented roles

Strong commercial experience with Python o

Practical experience with JavaScript and frontend development using modern frameworks such as React, , or Angular

Solid understanding of fullstack application architecture, including frontend-backend integration, REST APIs, and distributed systems

Strong experience with PostgreSQL, including database design, query optimization, indexes, views, functions, and triggers

Good knowledge of object-oriented programming, software design principles, and clean code practices

Hands-on experience with AI-assisted development tools such as GitHub Copilot, Cursor, Claude Code, or similar solutions

An AI-first mindset, with openness to leveraging AI tools, automation, and emerging technologies throughout the software development lifecycle

Ability to approach technical challenges from a solution-oriented perspective, considering business requirements, scalability, performance, and maintainability

Experience with CI/CD processes, version control systems, and modern software development practices

Strong problem-solving skills, independence, and willingness to take ownership of technical solutions

➕Nice to have

Experience developing applications in banking, fintech, or financial services

Familiarity with AWS or other cloud platforms

Experience with Docker and containerized applications

Knowledge of Linux operating systems

Experience with TypeScript and modern frontend architectures

Familiarity with microservices architecture and event-driven systems

Experience with AI agents, agentic coding workflows, or AI-powered development automation

Experience designing technical solutions from scratch or contributing to archite