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Senior .Net Backend Developer (digital banking)
Designs and develops scalable, secure backend services for digital banking platforms using .NET 6/8, ASP.NET Core, and Azure cloud services, focusing on APIs, integrations, and financial systems.
Mid-level Software Engineer
This mid-level software engineer role involves building and maintaining full-stack web applications using C#, .NET Core, and Angular. The position requires working with cloud technologies and SQL Server to deliver scalable solutions for critical environments while mentoring team members.
Backend Engineer (Kotlin/Java/Spring) - SmartID/Clip
Builds backend services for NAVER Clip (short-form video) and SmartID (authentication) using Java/Kotlin/Spring, while researching AI-driven CAPTCHA and authentication technologies.
Senior/Master Fullstack Developer (Python/React)
Senior/Master Fullstack Developer builds and evolves cloud-based enterprise platforms, owning end-to-end features with Python/React. Focuses on scalable architectures, observability, CI/CD, and AI-assisted development while collaborating with product/engineering teams.
Remote Full-Stack Lead Engineer | React/.NET | AI
Full-Stack Lead Engineer owning frontend architecture with React and Angular while designing RESTful APIs with .NET Core WebAPI and deploying on AKS, guiding projects and architectural decisions.
Full-Stack .NET & React Engineer — Cloud, CI/CD & Testing
Builds scalable .NET backend services (REST, auth) and middleware, integrating with React frontend while applying SOLID principles, Dapper/EF Core, and cloud tools.
Tech Lead – Operational Finance (Full-Stack)
Tech Lead for an operational finance full-stack platform in Łódź, Poland. Oversees backend (Java/Kotlin) and frontend (React) architecture, mentors engineers, and ensures high availability using PostgreSQL, Snowflake, Kafka, Docker, Kubernetes, and AWS.
Full Stack Engineer - End-to-End Mobility Platform
Backend-focused engineer owning end-to-end development of financial and operations platforms using Java/Kotlin (Spring) microservices, collaborating with React/JS frontends and data teams on PostgreSQL, Snowflake, dbt, with Docker, Kubernetes, and AWS.
Full-Stack Engineer – Hybrid, Kraków Banking Tech
The Full-Stack Engineer will develop backend and frontend components for a major banking client, working within a CI/CD environment. The role requires a willingness to learn multiple languages including Kotlin, JavaScript, and Python.
Full Stack Lead Engineer
The Full Stack Lead Engineer will oversee frontend architecture and backend development, focusing on scalable applications using React, Angular, and .NET Core. The role involves integrating Generative AI and managing cloud deployments via Azure Kubernetes Service.
Cloud-Native Full-Stack Java Developer (FinTech)
Full-stack Java developer building and integrating REST APIs in a cloud/microservices environment for financial industry clients, working on both backend and frontend.
Full-Stack Java Developer: Cloud & FinTech
Full-Stack Java Developer building end-to-end financial applications using Java/Spring, JavaScript, Azure cloud, Docker, and Kubernetes in Agile teams.
Remote Java Backend Engineer - Microservices & Cloud
Develops cloud-native microservices for a fintech client using Java/Spring, ensuring scalable backend systems with REST APIs and databases like PostgreSQL/Oracle/Redis.
Senior Java Backend Engineer | Spring Boot & APIs
Senior Java Backend Engineer working on a water loss analysis system, building and maintaining backend services with Java, Spring Boot, and REST APIs in a hybrid model across multiple Polish offices.
Senior Java Backend Engineer — Spring & REST (Hybrid)
Senior Java Backend Engineer building large-scale backend services with Java/Spring Boot and REST APIs for water network loss analysis and data processing systems in an international team.
Java Backend Engineer — Spring Boot, Hybrid Warsaw
ALTEN Polska is hiring a mid-level Java Backend Engineer to work on backend applications and system integrations using Java 21, Spring Boot 3, and microservices architecture. The role is based in Warsaw and requires experience with Kafka, Docker, and various database technologies.