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Integration Developer (Fintech & Payments)
About On The Spot
About the team
We’re looking for an Integration Developer to join an Israeli fintech startup that focuses on automating chargeback management and preventing e-commerce fraud.
About the role
We are looking for a highly skilled Integration Developer with deep expertise in the fintech and payments ecosystem. The ideal candidate would have hands-on experience integrating with major payment platforms such as Stripe, Adyen, Shopify, Klarna, Braintree, and others, with strong specialization in dispute management, chargebacks, and payment operations workflows.
This role is ideal for someone who understands both the technical depth and domain complexity of fintech integrations — someone who can own end-to-end delivery, from API integration to data flows, observability, error handling, and long-term maintainability.
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Responsibilities
- Design, develop, and maintain integrations with payment processors and platforms such as Stripe, Klarna, and Shopify
- Work with our technical team to build and maintain a scalable and secure integration architecture
- Develop and implement APIs and data scraping tools to retrieve data from various sources
- Collaborate with cross-functional teams to ensure seamless integration with our products and services
- Troubleshoot and resolve technical issues related to integrations
- Participate in code reviews and ensure high-quality code standards
Requirements
- 3+ years of experience in integration development, preferably in the fintech industry
- Deep expertise in payment ecosystems and payment processors such as Stripe, Adyen, Shopify, Klarna, Braintree, and others
- Strong knowledge of Node.js, AWS, and cloud-native architecture
- Experience with event-driven architecture and distributed system architecture
- Familiarity with Terraform and other infrastructure-as-code tools
- Strong problem-solving skills and attention to detail
- Excellent communication and collaboration skills
Nice to have
- Experience with disputes management and chargeback processes
- Knowledge of webhooks and WebSockets
- Familiarity with scraping tools and data extraction techniques
Benefits
- Work in a highly professional team. Informal and friendly atmosphere in the team
- Paid vacation — 20 business days per year, 100% sick leave payment
- Equipment provision
- Partially compensated educational costs (for courses, certifications, professional events, etc.)
- Legal and Accounting support in Poland
- Ability to work from our comfortable office in Warsaw at Prosta 51
- 5 sick days per year
- Medical insurance (after the end of the probationary period)
- Flexible working hours – we care about you (!) and your output
- English and Polish classes 2 times a week (online)
- Bright and memorable corporate life: corporate parties, gifts to employees on significant dates
Join us
To be considered for this position, you must have Polish citizenship, a D-type work visa, or a residence permit. Thank you!
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