developer English-speaking jobs in Koszalin

Build, optimize, and maintain big-scale data warehouses for leading brands using Snowflake. Requires 5+ years of data warehousing experience, 5+ years with Snowflake, and 2+ years with Apache Kafka. Strong SQL and Python skills, data modeling experience (Medallion and Kimball), and ETL/ELT process development are essential.

Internship opportunity with Marsh's US Tax Operations Team in Warsaw. Gain hands-on experience in US tax operations within a global professional services firm. Successful interns may have the chance to extend their cooperation and grow into a US Tax Consultant role.

Design, build, and deploy machine learning models with a focus on graph algorithms and Graph Neural Networks. Analyze large datasets to identify patterns and trends, leveraging graph analytics to optimize supply chain networks. Translate business problems into data science projects, selecting appropriate tools and methodologies. Collaborate with various roles throughout project lifecycles.

Develop and maintain web applications on the OutSystems platform. Implement user interfaces, integrate with APIs, and collaborate with teams.

Senior Backend Engineer to design, develop, and maintain scalable backend services for an internal communications platform. Experience with GoLang, cloud platforms, and containerization technologies required. Collaborate with ML Scientists and Data Scientists to transition prototypes into production-ready services.

Planner 5D seeks an experienced Android Engineer to develop next-generation mobile experiences. Responsibilities include building custom views and APIs, optimizing performance, and experimenting with new features. Requires 7+ years of Android development experience, proficiency in Kotlin and Java, and understanding of Android frameworks, libraries, and best practices.

Execute aligned omnichannel marketing strategy, adapting global campaigns to local needs. Plan, track, and report on marketing activities, translating business targets into communication measures. Manage marketing budget and collaborate on new campaign concepts and loyalty program execution.

As a Transfer Agency Investor On Boarding Representative, you will drive due diligence checks on shareholder accounts to achieve accuracy and client satisfaction. Responsibilities include updating investor accounts, establishing client contacts, and ensuring adherence to policies and procedures.

Support the Business Development Representative and Field Hunting team in building pipeline in the Polish transport and logistics market. Research companies, identify decision-makers, and analyze fleet size and type. Contact target companies to secure meetings for sales representatives.

Freelance Senior Backend Developer sought for diverse IoT projects. Build and maintain scalable backend and cloud solutions, optimize AWS infrastructure, and develop high-performance backend services. Strong experience with AWS services (EKS, S3, Aurora, DynamoDB, Timestream, EMR), Node.js/Next.js, Kubernetes, Docker, and Terraform required.

Project engineer to implement ground segment systems for clients in Poland. Responsibilities include deploying control center software, preparing deliverables, and installation at GMV and client sites. Seeking a system engineer with interest in the Space sector and basic programming knowledge (C++, Java, Python).

Leads enterprise end-user device architecture, defining standards and roadmaps for various device types. Designs Intune policies, manages endpoint security, and ensures secure, scalable, and cost-effective solutions.

Senior Software Business Analyst to translate business requirements into technical specifications for a SaaS platform focused on AI-driven process mining and analytics.

Product Data Scientist will partner with product teams and business leaders to understand Agentic AI use cases and collaborate with data scientists globally to improve user experience. Responsibilities include developing insights to guide the Agentic AI framework roadmap, proposing solutions to business problems using GenAI and Agentic AI techniques, and writing production-grade code.

Senior QA Engineer will lead complex projects, elevate engineering quality, and shape testing strategy. Responsibilities include driving high-impact outcomes, mentoring, and communicating risks and insights to stakeholders. Requires strong knowledge of testing theory, Agile methodologies, and experience with backend, full-stack, and native app testing.

Senior Android Developer to design, develop, and maintain Android applications using Kotlin and Java. Collaborate with teams to deliver new features and ensure high code quality. Requires 5+ years of experience, proficiency in Kotlin, and knowledge of Android SDK, Jetpack libraries, and MVVM architecture.

Serves as the primary point of contact for technical and quality-related customer queries. Communicates with internal and external stakeholders, prepares product specifications, and delivers customer documentation. Manages projects, provides progress reports, and supports product development and audits.

Designs and develops data warehouses, builds ETL processes using GCP data services like BigQuery, Dataflow, and Pub/Sub. Collaborates with teams to understand business requirements and ensure data quality. Requires 3+ years of Data Engineering experience with at least 2 years focused on GCP, proficiency in SQL and Python, and knowledge of Apache Airflow.

Data Scientist needed for SEM keyword structure design, predictive algorithm creation, and campaign management. Requires a Bachelor, MSc, or PhD in Mathematics, Physics, Computer Science, Software Engineering, or a related field. Statistics knowledge and English fluency are essential.

Senior Performance Engineer needed for a financial project focused on Java/WebLogic applications. Responsibilities include performance testing, optimization, and monitoring. Requires experience with JMeter, AppDynamics, and WebLogic application optimization.