Lead Fullstack Engineer

Domain: Banking & Finance

Experience: 8+ years

Project Duration: September 1, 2026 – November 30, 2026(There is a high possibility of extension, as the client is looking for a long-term collaboration)

Format: Hybrid

Location: Kraków, Poland, the client requires office visits in Kraków 8 days per month

About the Project

We are looking for a Lead Fullstack Engineer to join a global technology team developing innovative risk and compliance solutions.

The role combines hands-on software development with technical leadership, with a strong focus on scalable backend systems, cloud-native technologies, and modern web applications.

The initial contract runs until the end of November 2026 due to the client's budget year closing. However, there is a high possibility of extension, as the client is looking for someone who can continue working with the team for a longer period.

Responsibilities

Provide technical leadership, guidance, and mentorship to the development team while supporting successful project delivery

Design, develop, and maintain scalable backend services and APIs using Java and Spring

Develop end-to-end features, including frontend components with React and TypeScript

Design and implement microservices, event-driven integrations, and workflow-based solutions

Create solution architectures and maintain technical documentation, including UML diagrams

Develop and maintain batch-processing solutions when required

Ensure applications are production-ready through effective logging, monitoring, resilience, and error-handling practices

Promote high software quality through automated testing, code reviews, and static code analysis

Containerize and deploy applications using Docker and Kubernetes

Work collaboratively within Agile teams to deliver scalable, reliable, and cloud-native solutions

Requirements

8+ years of experience in enterprise application development, with a strong focus on backend engineering

2+ years of experience in a technical leadership role, including mentoring developers and taking ownership of delivery

Advanced knowledge of Java and the Spring ecosystem, including Spring Boot, Spring Data, REST, and Spring Security

Strong experience designing microservices, micro-database architectures, and event-driven applications

Hands-on frontend development experience with ReactJS and TypeScript

Practical experience with Docker, Kubernetes, and cloud-native development environments

Solid understanding of API design, specification, and documentation using Swagger/OpenAPI

Experience with automated testing, code quality and analysis tools, and addressing security vulnerabilities

Working knowledge of Agile/Scrum methodologies, JIRA, and Confluence

Fluent English

Tech Stack

Java

Spring / Spring Boot

Spring Data / Spring Security

REST APIs

React

TypeScript

Docker

Kubernetes

Swagger / OpenAPI

Agile / Scrum

JIRA

Confluence

Recruitment Process

Technical interview with external partner (Karat)

1.5-hour technical interview with the end client

Cultural fit interview