Top Tech Jobs & Startup Jobs in Warsaw

Support delivery of AI/ML solutions for Workday products by applying statistical and machine learning methods, building models and visualisations, assisting deployment alongside engineers, and collaborating with senior team members to learn and deliver on client projects.

Design, develop, maintain, and improve scalable .NET applications while ensuring performance and user experience. Collaborate with cross-functional teams, troubleshoot complex systems, lead technical discussions, coach team members, and contribute to testing, CI/CD, refactoring, and continuous improvement.

The AR Accountant manages cash collection and allocation, customer disputes and invoice queries, account reconciliations, credit limit analysis, credit risk support, order releases, recharge invoices, and month-end and year-end activities. The role also prepares reports, performs bank reconciliations, identifies process improvements, and collaborates with local, regional, and global teams. Strong accounts receivable knowledge, analytical ability, Excel skills, attention to detail, and English, Polish, and French proficiency are required.

Manage strategic B2B SaaS customers as their primary point of contact, maximize product ROI, advise on fraud and compliance best practices, translate technical challenges into solutions, monitor KPIs, and coordinate internal teams. The role requires strategic account management, customer-facing communication, project coordination, analytics, and expertise in fraud, payments, compliance, or AML/KYC, with a focus on banking customers and API integrations.

Build a greenfield data platform and unified Lakehouse integrating high-volume payment, marketing, and operational data across AWS and GCP. Design ingestion pipelines, create dbt medallion-layer transformations in BigQuery, and own Airflow orchestration, lineage, backfills, retries, alerting, infrastructure as code, and cost controls. The role requires autonomous ownership in a fully remote, asynchronous environment, with data mesh and Starburst Galaxy experience as preferred qualifications.

Develop and maintain integration and end-to-end automated tests for an AI-powered Microsoft Excel add-in across macOS, Windows, and web browsers. Collaborate with product managers and developers to optimize test coverage, deliver tests for critical functionality, report reproducible bugs, and validate fixes. The role requires API, database, UI automation, coding, Git, Jira, and CI/CD expertise, with remote collaboration and at least three hours of EST overlap.

Leads supply chain services for assigned customer accounts, owning multi-site or multi-customer P&L, service delivery, operational performance, and revenue growth. Manages customer relationships, contract negotiations, pricing, RFPs, quarterly business reviews, and strategic planning. Oversees direct reports, drives customer satisfaction and continuous improvement, and coordinates cross-functional teams to achieve financial and operational objectives. Requires strong financial, supply chain, leadership, negotiation, and customer service expertise.

Build and ship full-stack features for a data intelligence SaaS platform, spanning backend services and frontend interfaces. Use AI coding assistants to accelerate development while applying sound engineering judgment. Participate in architecture discussions, code reviews, testing, incident response, troubleshooting, documentation, and knowledge sharing. Partner with product managers to translate requirements into technical solutions. The role emphasizes SaaS architecture, AWS cloud fundamentals, Docker, Kubernetes, CI/CD, agile delivery, autonomy, and production ownership.

Manage and optimize affiliate, direct display, and programmatic campaigns to drive customer acquisition and sustainable growth. Own affiliate partnerships, tracking, performance reporting, CAC, CPA, commissions, and payback metrics. Test and scale creative, placements, offers, and partners while collaborating with Paid Media, Data, Creative, CRO, and Compliance teams. Ensure campaigns meet FCA requirements in a regulated fintech environment.

Own River’s YouTube video strategy and production pipeline, from idea generation and research through scripting, packaging, editing, and performance optimization. Develop compelling titles, thumbnails, hooks, and stories about Bitcoin and economics; guide hosts and editors; and build repeatable systems for content production and testing. Success is measured through views, retention, click-through rate, and returning viewers.