Senior Backend Developer

Job description

BetterCharge is rewriting the rules of payments. We help merchants recover lost revenue from declined cards by working smarter and faster—think real-time transaction decisioning, clever retries, and seamless partner integrations. Our platform quietly hums behind the scenes, making money flow better, smoother, and stronger.

As a Senior Backend Developer, you’ll be the engine room operator of this mission-critical system—designing and building backend services that handle high-volume financial data with speed, reliability, and security. You’ll work closely with our CTO and founding team to push the boundaries, make smart architectural calls, and deliver rock-solid code.

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Job responsibilities

• Architect, build, and maintain backend services and APIs in Node.js on AWS (Lambda, S3, Kinesis, and more)
• Own critical infrastructure powering transaction flows and retry engines
• Collaborate tightly with product, data, and integration teams to ship end-to-end features
• Lead code reviews, mentor engineers, and champion backend best practices
• Identify and fix performance bottlenecks, security issues, and stability gremlins
• Contribute to architecture decisions, observability tooling, and developer experience improvements

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