Senior Full Stack Engineer (React+Java/Kotlin)

Advertised Category: 
Java
JavaScript
Primárny skill: 
Information Technology\JavaScript
Information Technology\Java
Level: 
Permanent
Krajina: 
Slovakia
City: 
Bratislava
50% HO
Keywords: 
JavaScript
ES6+
React
Tailwind
API
MSSQL
PostgreSQL
Azure DevOps
Docker
Kubernetes
Spring
Java
Kotlin
Ponúkaný plat: 
Base salary for this full-time role is 3,800-5,500 EUR/m. Final salary depends on requirements, scope, complexity and responsibilities of the role, as well as the applicant’s education, qualifications, expertise, skills and experience.

About the Client

We are one of the world’s leading providers of reinsurance, insurance and other forms of insurance-based risk transfer, working to make the world more resilient. We anticipate and manage a wide variety of risks, from natural catastrophes and climate change to cybercrime. Combining experience with creative thinking and cutting-edge expertise, we create new opportunities and solutions for our clients. This is possible thanks to the collaboration of more than 14,000 employees across the world.

About the Role

As the Senior Full Stack Engineer with strong frontend skills, you will design and develop software solutions, assist fellow engineers through peer coding and reviews, and lead discussions on development approaches and best practices. Collaborate with product owners, architects, and engineering teams to translate business needs into robust technological solutions that align with the product vision and roadmap.  

This role is suitable for candidates of all genders.

Responsibilities

- Design and develop high-quality, rich front-end applications for cloud-native, scalable environments. 
- Build and maintain secure, reliable, and high-performing software that meets scalability and client requirements. 
- Participate in architecture and design workshops, code reviews, and SDLC activities, collaborating closely with architects, engineering managers, and product owners. 
- Evaluate and prototype new technologies by building Proofs of Concept (PoCs). 
- Promote and apply software engineering best practices through collaboration, code reviews, and continuous improvement. 
- Working in Agile environments, delivering high-quality software, mentoring engineers, conducting code reviews, and driving engineering best practices. 

Requirements

- Expertise in JavaScript (ES6+), TypeScript, and React, including hooks, functional components, and modern React patterns. 
- Strong UI development experience with responsive design, MUI, CSS-Modules, Tailwind CSS, Post CSS, and Sass/Less. 
- Strong knowledge of Redux Toolkit, Context API, Tan Stack Query, React Router/Tan Stack Router, route-driven UX, lazy loading, code splitting, and frontend performance optimization. 
- Strong knowledge of web accessibility (WCAG), semantic HTML, ARIA, keyboard navigation, color contrast, and automated accessibility testing. 
- Strong testing experience with Jest, React Testing Library, user-event, and exposure to Cypress or Playwright. 
- Experience in designing, developing, and integrating APIs, with the ability to understand backend implementations and perform end-to-end troubleshooting. 
- Strong knowledge of relational databases (MSSQL, PostgreSQL), schema versioning (Flyway), and ORM frameworks (Hibernate, JPA). 
- Experience designing, implementing, testing, and delivering reliable, high-performance, scalable cloud-native applications using modern cloud services and architectural patterns. 
- Hands-on experience with enterprise authentication and identity solutions. 
- Experience with application packaging and containerization, including build tooling, Azure DevOps pipelines, Docker, and Kubernetes. 
- Strong understanding of secure software design, secure coding practices, static code analysis, vulnerability scanning, and remediation. 
- Basic knowledge of Terraform, including reading existing configurations and implementing minor changes. 
- Understanding of Infrastructure as Code (IaC), cloud infrastructure, networking, security, resource provisioning, and cloud operating models. 

Nice to Have Skills

- Experience designing and implementing enterprise backend applications using Java/Kotlin and Spring Boot. 
- Knowledge of cross-service communication patterns, including REST APIs, messaging, and JSON serialization. 
- Experience with advanced Spring Boot features such as custom annotation processors, request interceptors, background task executors, asynchronous jobs, and Spring Security. 

How to apply
In case of your interest to apply for this position, please, send us your curriculum vitae in English language on tomas.simander@sourcefirstinternational.com .
Naša misia

Našou misiou je ponúknuť množstvo pracovných ponúk kvalifikovaným kandidátom a naplniť očakávania klientov a potreby projektov. Rozhodli sme sa pôsobiť a získavať zdroje v krajinách východnej Európy.

Kontaktujte nás

Klariská 14, 811 03 Bratislava, Slovenská republika
Lidická 700/19, 602 00 Brno, Česká republika

www.sourcefirstinternational.com jobs@sourcefirstinternational.com Tel: +421 903 427089
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