364 English-speaking jobs in Łódź

Quality Systems Specialist to build and maintain quality systems for medical software products classified as Software as a Medical Device. Will support regulatory compliant digital health solutions for EU and US markets, focusing on quality processes, documentation, audits, and continuous improvement.

Senior .NET Developer to design, develop, and maintain a Portfolio Management System. Responsibilities include backend services, desktop applications, and system integrations using C#, .NET, WPF, RESTful APIs, and RabbitMQ. Requires commercial experience with C#, .NET, VSTO, WCF services, Entity Framework, ADO.NET, and MS SQL Server.

Full Stack Developer to contribute to a modern web application platform using React, TypeScript, C#, .NET, and SQL. Develop and maintain both frontend and backend components, collaborating with a cross-functional team.

The Middle Penetration Tester will conduct network and application-level security assessments using automated tools and manual techniques. Responsibilities include preparing assessment reports, communicating with clients, and contributing to security process and tool improvement.

iOS Developer will implement new functionalities, monitor and resolve application issues, and ensure high code quality through automated testing.

Conduct in-depth threat modeling and cryptographic analysis of Rublon's authentication flows. Prototype and validate next-generation passwordless methods such as WebAuthn/FIDO2 passkeys. Continuously monitor emerging attack vectors. Translate research insights into production-ready features. Document and communicate findings in clear, risk-ranked reports. Support incident simulation and response.

Develop software for modern user authentication. Perform security research on Windows and Active Directory security, including authentication protocols and MFA integration.

Full-Stack Developer (Java EE, Angular) to design, develop, and support custom software solutions for automotive and international clients. Collaborate with stakeholders, implement backend and frontend functionality, and ensure high code quality. Proven experience in Java software development and Angular (version 7 or newer) required.

Software Engineer will design, implement, and optimize secure software in Rust and C++. Contribute to passwordless authentication components in TypeScript and build secure solutions for web proxies and communication layers.

Develop and improve Rublon Authentication Proxy with advanced LDAP and RADIUS capabilities. Focus on scalability, reliability, and observability for enterprise and cloud use cases.

Develop and optimize Android and iOS mobile applications. Collaborate with designers, backend developers, and product managers. Experience with Kotlin, Swift, Xcode, Android Studio, and Git required.

Administers, monitors, and supports enterprise network and security environments across cloud, hybrid, and on-premises infrastructures. Designs secure network architectures, implements security policies, and analyzes network traffic. Requires deep understanding of Zero Trust architecture, network security technologies, and cloud platforms.

Backend Engineer will design, develop, and implement software solutions for an IIoT platform using Java and cloud technologies (Microsoft Azure). Experience with agile software development, container-based architectures, and microservices is required. Fluency in English is mandatory, German is a plus.

Lead and execute time-critical business deliveries using Agile methodologies. Drive cross-team dependencies, ensure alignment with stakeholders, and enhance team collaboration.

Experienced IT Security Business Analyst needed for an international Identity and Access Management (IAM) team. The project focuses on building and maturing capabilities related to secure handling of non-human privileged access, including credentials used by applications, services, DevOps pipelines, and cloud environments. Responsibilities include analyzing business and technical requirements, supporting vendor selection, participating in Proof of Concept activities, and collaborating with stakeholders.

Senior Python Engineer to design, develop, and maintain scalable finance-focused backend solutions using Python and Django. Integrate external systems, APIs, and work with Product Managers to solve customer problems. Must have strong Python engineering skills, experience with Django, API development, and automated testing. AWS experience and strong English communication skills are required.

Senior Quality Assurance Specialist designs, develops, and executes test plans for complex enterprise software, focusing on storage and data backup. Requires experience with SAN protocols, operating systems, data backup applications, and storage interfaces.

DevOps Engineer needed with strong experience in IBM integration technologies (ESB/ACE, MQ, DataPower). Solid understanding of DevOps practices, automation, CI/CD pipelines, and system reliability required.

Drive load and performance testing for connected home applications, ensuring scalability and reliability of the Home Connect IoT Platform. Analyze performance bottlenecks, evaluate components, and create automated load tests. Collaborate with dev teams on performance improvements.

We are looking for a Senior AI-first Engineer who combines deep technical expertise with a genuine, hands-on approach to AI-assisted development. You will work across varied client engagements — from modernizing legacy systems to architecting new products — and are expected to contribute at a high level regardless of project context.