Senior Backend Engineer (Python)

StairwaySoft is an Israeli-Ukrainian engineering provider of custom software solutions for SMBs and startups. We’re looking for a Senior Backend Engineer to join a product team building a compliance and business verification platform for financial institutions and fintech companies. The product helps regulated businesses verify companies, process business data, and automate compliance workflows using real-time data and AI-driven automation. The platform operates in a security-sensitive environment where reliability, performance, and data quality are critical. Responsibilities: Design and develop customer-facing REST APIs and supporting documentation Build and own backend services from architecture through implementation and production support Develop secure and reliable data ingestion and processing pipelines Build scraping and parsing components for collecting and structuring external data Design backend systems with scalability, resilience, and performance in mind Work with asynchronous processing, queues, pub/sub, retries, idempotency, and eventual consistency Monitor how features perform in production and improve them based on real usage and customer feedback Contribute to engineering standards, technical decisions, and development practices Work closely with product and other stakeholders to understand problems and deliver practical solutions Requirements: 5+ years of commercial backend engineering experience 3+ years of experience with Python, or strong experience with a similar backend language and willingness to work primarily in Python Strong experience designing and maintaining REST APIs Experience owning backend systems end-to-end in production Good understanding of distributed systems and asynchronous processing Strong experience with relational databases such as PostgreSQL or MySQL Solid knowledge of data modelling, indexing, query optimization, and schema evolution Experience working with cloud environments such as GCP, AWS, or Azure Experience with CI/CD and production deployments Strong product mindset and ability to understand the business problem behind a technical task Upper-Intermediate English proficiency Would be a strong advantage: Experience building web scrapers at scale Experience in fintech, KYC/AML, fraud, compliance, or other regulated domains Experience with high-throughput data pipelines or stream processing Experience with Kafka, Pub/Sub, Dataflow, or Flink Experience with Rust, Go, or C++ for performance-critical components