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Kolleno — We're Hiring
Open Position

Senior Backend Developer

Kolleno · Remote · Full-time · Stock options

About The Role We're looking for a developer who takes pride in crafting solutions that help enterprises grow. We are B2B Fintech in Payments, helping enterprises improve financial operations. Do you… – enjoy deeply understanding business problems before crafting solutions? – find satisfaction in designing systems that bring order to complex business operations? – take pride in building robust architectures that scale reliably? – excel at modeling complex business processes into elegant data structures? Here's what makes our work different We're not just building B2B software – we're creating payment systems that transform how businesses operate. Our enterprise clients trust us to understand their complex processes and turn them into efficient solutions. Your Day-to-Day – Design and build robust backends that power business transformation – Create sophisticated data models that reflect complex business rules – Develop reliable integrations between modern and legacy systems – Build powerful APIs that connect disparate business systems – Implement secure, scalable solutions for business-critical operations Experience Required – 5+ years programming experience with Python and/or 2+ years with Django – Django framework expert – Django REST Framework and AWS experience (nice to have) – Experience building and maintaining large-scale applications – Excellence in database design and optimization – Understanding of complex data modeling and migrations – Clear written communicator that prefers emails to meetings Technologies We Use Core: Django REST Framework, PostgreSQL, AWS Lambda Libraries: Pandas, OAuthlib Testing: pytest
Senior Backend Developer Mock Interview | Kolleno × SkillScan