Data Visualization Engineer

📍 Work mode: 100% Remote (US or UK working hours)🕒 Contract type: B2B💼 Experience level: Mid–Senior💰 Rate: 40–55 USD/h net + VAT📆 Project length: Long-term cooperation🏢 About the CompanyWe collaborate exclusively with a stable US-based client, a global leader in electronic trading platforms that has operated for over 25 years. The company serves the world’s leading asset managers, central banks, hedge funds, and other institutional investors — facilitating around 30 trillion USD in trades every month across its electronic marketplaces.📌 About the RoleWe’re looking for a Data Visualization Engineer to join an international team developing data applications and interactive analytics tools for large-scale trading systems.In this role, you’ll design and implement data visualizations, build reliable data pipelines, and contribute to the development of production-grade data services used by global financial institutions.💼 Your Responsibilities• Translate business requirements into technical specifications for data visualizations.• Present front-end mock-ups effectively to both technical and non-technical stakeholders.• Develop and operate data applications on Tradeweb’s data platform using public cloud infrastructure and modern technologies.• Build and maintain data pipelines — define schemas, create DAG workflows, and monitor data quality.• Manage and support mission-critical production services.✅ Must Have• 3+ years of experience in data engineering or front-end development.• Solid programming experience with Python, SQL, JavaScript, and HTML/CSS.• Strong hands-on experience building data visualizations with Streamlit, Plotly, or Dash.• Experience implementing authentication, authorization, and web application security.• Good understanding of HTTP, REST APIs, WebSockets, and gRPC.• Experience with Kafka, Spark, Airflow/Prefect, Pandas/Polars, or similar tools.• Experience with AWS or GCP (S3/GCS, EC2/GCE, IAM, etc.), Kubernetes, and Linux in production.• Excellent communication skills and ability to collaborate with technical and business teams.➕ Nice to Have• Experience building custom visualization libraries for Streamlit.• Automated testing of web applications.• Performance optimization and scalability improvements.• Contributions to open-source projects.• Experience in financial services or fintech.🎁 What We Offer• Competitive hourly rate: 40–55 USD/h net + VAT (B2B).• 100% remote work with alignment to US or UK time zones.• Long-term cooperation with a leading global fintech company.• Flexible work environment and technical ownership.• Opportunities to work with cutting-edge cloud and data technologies.3-stage recruitment process (the final stage is an in-person meeting at the office in Warsaw)