533 English-speaking jobs in Łódź

IT Operations Specialist to support system maintenance and delivery in a production environment. Responsibilities include release management, issue resolution, incident handling, and root cause analysis. Requires experience with Docker, Kubernetes, CI/CD tools, code repositories, Kafka, SQL, authentication mechanisms, cryptography tools, secure communication protocols, logging tools, monitoring tools, and microservices architecture.

Designs, implements, and maintains automated test solutions for web, API, and mobile applications. Executes functional, integration, acceptance, and automated tests. Develops and maintains automated test frameworks using Selenium WebDriver or similar tools.

Execute manual, integration, and regression tests based on project requirements. Report, track, and verify defects using test and defect management tools.

Senior Software Engineer will lead a team responsible for managing critical communication services, including email, SMS, and push notifications. Responsibilities include delivering quarterly goals, collaborating with product management and design, and ensuring the availability and quality of communication services. Requires 5+ years of experience designing, developing, and launching backend systems at scale using languages like Python or Kotlin.

Staff AI Engineer needed for remote-first company. Design and build LLM-based features using Gemini, ChatGPT, Claude. Expert Python knowledge (5+ years) and experience with LLMs, LangChain, LangGraph, LangSmith required.

Data Architect to build a next-generation cloud data and AI platform on AWS. Define and evolve the end-to-end data platform architecture, including ingestion, lakehouse/warehouse, orchestration, governance, and AI enablement.

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.

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 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.

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 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.

As our first AI Automation Specialist, you will embed with departments across the group, identify automation opportunities, and drive implementation from start to finish. You will select the right tools for each use case and work closely with stakeholders to ensure adoption.

Fullstack Developer needed for a 3-month contract to maintain e-commerce platform authorization/authentication, landing pages, and tracking systems. Responsibilities include developing and maintaining frontend applications using Next.js/React and backend services in Golang. Must have proficiency in Golang, Next.js, React, APIs, and web micro-services.

Data Engineer Architect to design, build, and maintain a scalable enterprise data platform using Databricks. Requires 8+ years of data engineering experience, 4+ years with Databricks, and expertise in Python, SQL, and cloud platforms (Azure, AWS, or GCP).

Senior Penetration Tester to conduct advanced security assessments of applications, systems, and infrastructure. Responsibilities include identifying vulnerabilities, developing attack scenarios, and collaborating with technical and business teams. Requires 5+ years of experience in penetration testing with expertise in web, mobile, and infrastructure security.

Senior Data Engineer to design and implement scalable data architectures using Google Cloud Platform (GCP). Experience with BigQuery, Dataflow, Pub/Sub, BI/ETL, and big data technologies required.

Senior .NET developer to design, build, and maintain secure, scalable backend solutions within an Azure cloud environment. Experience with REST APIs, OpenAPI, EF Core, SQL Server, and Azure services is required.

Senior .NET developer to build, maintain, and support a web-based self-service portal for the financial services industry. Responsibilities include developing new features, ensuring reliability, investigating incidents, and collaborating on CI/CD pipelines. Requires experience with ASP.NET Core, Azure services, and Azure DevOps.

Senior DevOps Engineer to architect and operate Kubernetes deployments across AWS and Azure. Design, implement, and maintain automated build processes and CI/CD pipelines. Build and maintain infrastructure-as-code templates using Terraform. Automate deployments, environment provisioning, and configuration management. Provide guidance and mentorship to development teams on DevOps practices.

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.