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We are a global leader in combating illegitimate chargebacks for merchants. Our chargeback mitigation solution combines advanced technology and deep payment expertise to efficiently handle disputes, enabling merchants to focus on growth.
About the Role
We are seeking a Senior software engineer to join the team, which is responsible for the core of our chargeback resolution platform. This role involves managing our central data pipeline, from ingesting chargeback data from Payment Service Providers (PSPs) to submitting dispute responses back to them. This position offers more than standard integrations; you will be tasked with designing and scaling the infrastructure for mission-critical data flows, addressing complex issues in distributed systems, API orchestration, and data integrity. Key Responsibilities
* Own the full lifecycle of PSP integrations and data pipeline systems
* Architect scalable backend services using Node.js, TypeScript, and NestJS
* Ensure data integrity across PostgreSQL and MongoDB at scale
* Drive architectural decisions and system design within our Nx monorepo
* Mentor team members and contribute to engineering best practices What We Offer
* Solve complex technical problems with real impact
* Engineering-driven culture with talented peers
* Significant ownership over architecture and product
* Modern stack: Node.js, TypeScript, NestJS, Nx, PostgreSQL, MongoDB, AWS
* Growth opportunities in a fast-paced fintech company.

Justt.ai is transforming chargeback dispute resolution with automation and AI. We've replaced a broken, manual process with technology that helps businesses recover lost revenue effortlessly. Our product leads the market, our Sales and Customer Success teams are scaling rapidly, and our strategic partnerships are driving serious growth. Now we're looking for an experienced Solution Engineer to own the technical side of our partner relationships. The Opportunity We're seeking a strategic Partnerships Solutions Engineer to join our growing team. This role covers the full solution engineering lifecycle - from pre-sales design and co-creating complex partner solutions to hands-on technical implementation and project leadership. You'll be central to that mission - owning critical engagements and ensuring every interaction reflects our commitment to precision, professionalism, and real business impact. If you're ready to make a significant impact at a scaling B2B Fintech and thrive in high-ownership environments, let's talk. What You'll Do: Pre-Sales & Solution Design
* Partner with our VP of Partnerships to understand technical requirements and provide expert guidance throughout the sales cycle
* Lead product demonstrations and technical workshops that showcase how Justt solves real partner challenges
* Design and present tailored solutions that address specific partner objectives and use cases Implementation & Onboarding
* Own the technical implementation of Justt's platform for new partners and enterprise clients
* Ensure smooth integrations with existing systems and infrastructure
* Deliver training and ongoing support to help partners maximize the value of our solutions
* Troubleshoot and resolve technical challenges during onboarding and beyond Cross-Functional Leadership
* Collaborate with Product, Engineering, Operations, and Customer Support to deliver exceptional partner experiences
* Create technical documentation, integration guides, and enablement materials
* Develop scopes of work and manage their execution from kickoff to completion