ruby English-speaking jobs in Bielsko-Biała

Lead and design a globally distributed AI inference platform with OpenAI-compatible endpoints. Architect, design, and optimize core infrastructure for performance, compliance, and cost-effectiveness. Provide thought leadership on AI inference optimization and model serving architectures.

Experienced QA Automation Engineer needed to build and maintain automated test frameworks, validate backend systems, and ensure software reliability. Collaborate with engineering, product, and QA teams to deliver stable releases. Requires 3+ years of experience in QA Automation, strong Python skills (PyTest, Selenium), and API/backend testing experience.

Shopify Developer will deliver end-to-end technical execution of custom Shopify themes and frontend solutions. Responsibilities include developing frontend solutions using Liquid, JavaScript, React, Tailwind, and GraphQL, and working with Shopify platform best practices.

QA Engineer roles available, one focused on front-end (Salesforce, UI testing) and the other on back-end (API testing, SQL, microservices). Collaborate with engineering teams on new features, test planning, execution, and release sign-off.

Lead and support metrology projects focused on high-precision geometry and dimensional measurements. Design, develop, and implement measurement methods and systems for complex parts. Analyze measurement data and conduct Measurement System Analysis (MSA). Collaborate with cross-functional teams to define measurement strategies and improve process understanding.

Senior Game Mathematician to design, validate, and fine-tune casino game mathematics, primarily slots. Collaborate with Game Designers and Developers to ensure engaging gameplay, compliant outcomes, and high-quality documentation.

Data Engineer to design, implement, and optimize batch and streaming pipelines using Beam, Spark, or Flink. Experience with GCP (Dataflow, BigQuery, Pub/Sub) and Apache Beam is required. Strong Java skills and experience with Airflow are also necessary.

Junior Sales Business Developer will reach out to potential clients, assess suitability for Handelot's Partner network, and explain the value of the platform. The role involves handling both inbound and outbound leads primarily in English, covering Europe, Asia, and America.

Embedded Software Engineer will design, develop, and maintain embedded software for microcontroller-based systems. Responsibilities include developing firmware features, integrating software with hardware, and collaborating with teams on software development, testing, and optimization. Requires at least 2 years of experience in embedded software development, strong Embedded C knowledge, and practical experience with RTOS.

Drive high-quality transport execution as a (Senior) Operations Specialist. Manage the full lifecycle of Sea Freight Export shipments and provide client support. Collaborate with partners and leverage data analysis to optimize processes.

Develop standalone apps for large touchscreen displays using Unreal Engine and Virbe's proprietary technology. Build desktop, mobile VR apps, and add features to the UE Marketplace plugin. Requires 2+ years of game or VR/AR app development experience and 1+ year with Unreal Engine.

Provide functional consulting and support for a bespoke SAP solution with extensive custom developments. Analyze, troubleshoot, and optimize complex business processes in supply chain and logistics. Collaborate with development and technical teams to understand non-standard functionality and custom implementations. Drive system enhancements, testing, and deployment activities in a GxP context.

QA Engineer needed to ensure software quality across global projects. Responsibilities include documentation testing, creating test suites, identifying bugs, and verifying functionality across platforms. Must have 2+ years of experience as a QA Engineer, experience with back-end and front-end testing, SQL databases, REST API, CI/CD principles, GitLab, Jira, Confluence, and Scrum. Strong analytical, problem-solving, communication, and collaboration skills are required. Fluency in English and German is necessary.

DevOps Engineer (API Management) will join an international team responsible for engineering activities supporting production services and infrastructure in a cloud-native environment. Focus will be on deployment, automation, maintenance, and continuous improvement of the API Management platform based on Gravitee and Kubernetes. Responsibilities include implementing deployments, managing Kubernetes environments, automating deployments and upgrades, and supporting API gateway runtime operations. Experience with Linux/Unix, Kubernetes, networking, security concepts, deployments, CI/CD pipelines, and Infrastructure as Code is required.

Python Developer needed to design, build, and test web applications using FastAPI. Experience with relational databases (e.g., PostgreSQL), REST APIs, WebSockets, and CI/CD pipelines is required. Must have strong Python skills (3+ years) and fluency in English and Polish.

Lead a team in the design and delivery of digital products, including solutions design, component development, and problem-solving. Requires 7+ years of full-stack development experience, 3+ years in Node.js backend development, and 5+ years in React + Redux frontend development. Experience leading design and delivery, databases (MongoDB), code quality assurance, and fluency in English and Polish are also necessary.

Lead end-to-end warehouse projects including process improvements, system upgrades, and automation. Coordinate cross-functional teams and external partners. Analyze data to identify inefficiencies and drive operational improvements.

Senior Software Engineer (Go) will own and deliver quarterly goals, lead engineers through problem-solving, and collaborate with product management, design, and analytics. Requires 5+ years of experience designing, developing, and launching backend systems at scale using languages like Python or Kotlin. Experience with AWS, MySQL, and Kubernetes is necessary.

Staff Infrastructure Engineer will design and scale the platform's core infrastructure, ensuring it can handle massive data volumes. Responsibilities include defining and evolving infrastructure architecture, leading SRE practices, designing a self-service platform, and partnering with security and compliance teams. Requires deep experience with cloud platforms (Azure preferred), containers and orchestration, IaC, CI/CD, observability, security, networking, and data platforms.

Data Engineer to build and launch data pipelines and data models in Azure cloud environments. Collaborate with clients, implement best practices, and optimize analytical solutions. Requires 2+ years of experience in data engineering, cloud platforms (Azure, AWS, or GCP), Python, SQL, and relational databases.