Senior Software Engineer II, Customer Experience

The role

You will design and build services that ingest, match, and settle transactions at scale. You will work on the Customer Experience team to own features through the Shape Up cycle and improve operational readiness.

What you will do

• Architect and build scalable services across transaction matching, the cellar pipeline, and offer ingestion
• Own features end-to-end through the Shape Up cycle
• Participate in on-call, incident response, and IOC triage
• Strengthen issuer and client-facing APIs and SDKs
• Make technical calls and foster collaboration across Product, Design, and Engineering
• Champion enhancements to the tech stack, methodologies, and standards
• Mentor engineers and contribute to design and architecture discussions
• Write clear documentation and playbooks

Required qualifications

• Expert programming skills in Go and/or TypeScript
• Experience building scalable, secure, high-performance backend services
• Solid experience with distributed systems, event-driven architectures (SQS, Temporal)
• Experience with both relational and document databases (Postgres and MongoDB)
• Proficiency with AWS and Infrastructure-as-Code (Terraform)
• Experience with container technologies (Kubernetes/EKS) and serverless components (Lambda)
• Experience working on transaction-processing, matching, or ingestion pipelines
• Comfort leading a technical project from discovery through production rollout
• Skilled with agentic software development using AI tools
• Commitment to fostering an inclusive, collaborative engineering culture
• U.S. core business hours availability
• Willingness to travel for company meetings

Nice to have

• Experience with card-linked offers, loyalty, fintech, or another transaction-intensive marketplace
• Experience with partner data ingestion and validation/monitoring
• Familiarity with Cognito-based auth, API gateway enforcement (e.g., Envoy), or claims-based authorization
• Experience with Databricks or a similar data platform
• Experience with migrating services from a legacy stack without disrupting production
• Contributions to the tech community or open-source projects
• Past success in startup settings
• Track record of empathy, collaboration, and productivity in remote work

Benefits

• Flexible PTO with a minimum requirement to take one day off a quarter
• Observance of 11 Federal Holidays
• Additional day off for Black Friday and Christmas Eve (US employees only)
• Health, Dental and Vision Insurance
• 401k with employer match (US employees only)
• Coworking space and WFH setup reimbursement
• Company Offsites for planning, team-building, and networking

About the company

Kard is building commerce media infrastructure that connects financial institutions, financial-services platforms, and merchants through data and merchant-funded rewards. It is a remote-first team.