Senior Python Developer

Quick Facts

Senior Python Developer role focused on secure, high-performing systems for digital assets and blockchain-based financial operations.

Description

You’ll build and extend software that supports critical financial operations in the digital assets and blockchain ecosystem. The role includes feature development, technical specification, testing, code reviews, and presenting work to technical leadership. You will also implement secure integrations with blockchain networks, crypto exchanges, and digital wallets.

Responsibilities

• Collaborate with team members and stakeholders in developing features and new products
• Develop solutions according to specified business requirements
• Define and write up technical specifications, including the appropriate technology and workflow to coding standards
• Demonstrate and present implementation work to team leaders, heads, or the CTO
• Implement unit and integration tests to validate functionality
• Ensure software meets requirements of quality, security, modifiability, and extensibility
• Participate in code reviews; identify anti-patterns and opportunities for refactoring
• Design and implement secure integrations with blockchain networks, crypto exchanges, and digital wallets
• Contribute to systems supporting cryptocurrency trading, custody, and settlement

Requirements

• Bachelor’s or Master's degree in Computer Science, Software Engineering, or a related field
• 3+ years of experience in software development
• Excellent knowledge of software and application design and architecture
• Technical mindset with great attention to detail
• Understanding of software quality assurance principles
• Experience with software development lifecycle (SDLC) processes
• Experience with service-oriented architecture (SOA)
• Experience developing and coding in Python
• Experience with SQL and NoSQL databases
• Some experience with RabbitMQ, Kafka, or similar messaging technologies
• Experience developing microservices and managing containerized applications
• Some experience building WebSockets
• Some level of experience with Kubernetes and Infrastructure as Code tools such as Terraform and Helm
• Proficiency with version control and continuous integration tools such as Git and Jenkins
• Understanding of web security standards and best practices
• Strong knowledge of blockchain fundamentals, cryptography, and digital assets
• Hands-on experience integrating with crypto APIs (REST/WebSocket), smart contracts, or blockchain SDKs
• Upper-Intermediate English competency (B2)

Benefits

• Hybrid-by-design with opportunity to work remotely within Poland
• Chance to work abroad for up to 60 days annually; business-driven relocation opportunities
• Career development programs, mentoring, and soft skills and well-being programs
• Certification support (Anthropic, Gemini, GCP, Azure, AWS) and English classes
• Stable pay and Employee Stock Purchase Plan with a 15% discount
• Benefits package (health insurance, multisport, shopping vouchers)
• Referral bonuses up to $2,000
• Office amenities and corporate/social/well-being events
• Benefits apply to employees; B2B contractor work is available with individually agreed terms