717 English-speaking jobs in Łódź

Senior Fullstack Developer to build a complex iGaming platform using React, Node.js, and Nest.js. Requires 3+ years of commercial experience with these technologies and 5+ years in web development. Must have knowledge of JavaScript, ECMAScript 6, REST, GraphQL, WebSockets, and TDD.

Senior TypeScript Engineer to enhance blockchain integration for Ledger Live. Develop and evolve integrations across web and mobile platforms, utilizing JavaScript, TypeScript, and modern development practices. Collaborate with cross-functional teams to deliver secure and seamless user experiences.

As a Senior QA Manual Engineer, you will join an international team ensuring the quality of blockchain-based mobile and web applications integrated with hardware wallets. Responsibilities include building test plans, writing test cases, validating use cases, reporting test results, and collaborating with development and hardware teams.

Senior TypeScript Engineer to develop and maintain Ledger Live (mobile and desktop) and the Device SDK. Responsibilities include contributing to open-source projects, supporting modularization efforts, and collaborating with cross-functional teams. Requires 5+ years of software development experience, including a Tech Lead role, strong JavaScript and TypeScript skills, and professional fluency in English.

Senior Python Engineer to develop and maintain data-intensive applications and infrastructure for machine learning products. Responsibilities include working with Kafka, AWS, and deploying cloud-native services. Requires extensive Python backend development experience and a deep understanding of AWS services and Infrastructure as Code.

Senior Typescript Engineer will develop and maintain Ledger Live, a blockchain asset management application. Responsibilities include building UI flows, collaborating with developers and hardware engineers, and ensuring a reliable and user-friendly experience across web and mobile platforms.

Data Architect will design and evolve data architectures for AI/ML workloads, including fraud detection, risk scoring, and spend optimization. Responsibilities include developing data models, pipelines, and strategies aligned with platform roadmaps. Requires 10+ years of experience in data architecture, cloud native platforms (AWS), and ML operations.

Svitla Systems seeks a Middle ML Engineer with 3+ years of experience delivering production AI/ML systems. Requires strong Python, SQL, and software engineering fundamentals. Proven experience with LLM applications in production (RAG, embeddings, vector search, model versioning) and understanding of model training/evaluation (PyTorch; scikit-learn). Experience with cloud deployment and operations on AWS and/or Azure is necessary.

Senior Database Administrator needed for managing, optimizing, and securing PostgreSQL and MySQL database environments. Experience with Terraform, Ansible, and Linux system administration is required. Auto failover, DNS management, and load balancing experience is crucial.

Senior Full Stack Engineer will contribute to a global gig-economy marketplace platform. Responsibilities include designing, building, and maintaining scalable APIs and microservices, developing CI/CD pipelines, and collaborating with cross-functional teams.

Senior C++ Computer Vision Developer will design and optimize image-processing pipelines for video collaboration hardware. Responsibilities include developing computer vision algorithms, improving image reconstruction algorithms, and optimizing code for embedded systems. Requires 8 years of C++ development experience, a relevant degree, and strong computer vision and image processing knowledge.

Build and scale AI infrastructure features end-to-end in Next.js. Design, develop APIs, services, and integrations. Shape platform architecture and product direction.

Senior UX UI Designer sought for a talent pool. Must have 5+ years experience, strong portfolio, excellent communication skills, and proficiency in Figma. Experience with user research, journey mapping, and AI tools is preferred. Must be fluent in English (C1 level).

Senior QA Automation Engineer sought for talent pool. Must have proven experience building and maintaining automation frameworks, proficiency in Selenium and Playwright, and strong coding skills in .NET or JavaScript/TypeScript. Manual testing, API and database testing, performance testing, and excellent communication skills are also required.

Senior Product Owner will analyze, gather, and document business and functional requirements. Collaborate with stakeholders, developers, and QA teams throughout the product development lifecycle. Prioritize the Product Backlog and leverage AI tools to enhance productivity.

Senior Fullstack Developer sought for a talent pool. Must have 5+ years experience in .NET / Python / Node.js (Backend) and React / Angular (Frontend). Strong debugging, unit testing, and communication skills required. Fluent English (B2) and experience with agile methodology are essential.

Senior IT Infrastructure Engineer to support and develop central IT infrastructure across multiple sites for a strategic client in the UK. Responsibilities include managing VMware-based infrastructure, Microsoft 365 environment, Active Directory, and Windows environments. Requires 6-8 years of experience in hybrid IT environments, strong VMware and Microsoft ecosystem expertise, and fluent English communication skills.

Senior Python Engineer needed for a large-scale utility service platform transforming the global energy industry. Design, develop, and maintain scalable finance-focused backend solutions using Python and Django. Integrate external systems and APIs, write high-quality code, and participate in peer reviews. Must have strong Python engineering skills, experience with Django, API development, and automated testing. AWS experience is required.

Provides data analysis and reporting support to leadership and stakeholders. Requires proficiency in Excel, data modeling, and strong communication skills.

Senior Backend Engineer (Java / Architecture) needed for a long-term freelance project. Refactor and modernize legacy backend systems, improve microservices, and maintain REST and SOAP interfaces. Must have strong Java (Spring / Spring Boot) and architectural skills, experience with Kubernetes, and excellent communication skills.