Sezzle is seeking a Senior Software Engineer II to define and deliver our next-generation Kafka-first streaming infrastructure. You will be instrumental in building and maintaining the high-availability platform that powers real-time features across the company.

What You'll Do

Design, build, and maintain streaming services using Kafka, Spring Boot, and Spring Cloud Stream
Develop and manage Kafka connectors for data integration with DynamoDB, S3, and custom sinks/sources
Own schema management and evolution using Protocol Buffers, Schema Registry, and multi-language code generation
Support ongoing platform migrations, including multi-cluster consumption patterns and infrastructure transitions
Build monitoring, observability, and operational tooling to ensure system reliability
Collaborate with cross-functional teams on API design, data contracts, and integration patterns
Write infrastructure as code using Terraform and automate deployments through CI/CD pipelines
Participate in on-call rotation and incident response
Mentor team members and contribute to team processes and technical standards

What We're Looking For

6+ years of backend software engineering experience
Strong proficiency with Java and Spring Boot
Experience with Apache Kafka or similar distributed streaming platforms
Solid understanding of distributed systems concepts: consistency, fault tolerance, replication, and data durability
Comfortable with cloud infrastructure (AWS preferred) and containerized deployments
Problem-solving mindset and a collaborative approach
Ownership mentality, learning orientation, and thoughtful communication

Nice to Have

Experience with Go (used for CLI tools and some services)
Familiarity with gRPC and Protocol Buffers
Background in stream processing frameworks (Kafka Streams, Flink)
Experience with schema registries and schema evolution strategies
Knowledge of Confluent Platform or Confluent Cloud
Understanding of CI/CD patterns, GitHub Actions, and artifact management (Maven, Nexus)
Experience with observability tooling (Prometheus, Grafana, DataDog)
Previous work on large-scale platform migrations or infrastructure modernization projects

Technical Stack

Kafka, Spring Boot, Spring Cloud Stream, Protocol Buffers, Terraform
AWS, DynamoDB, S3
Go, gRPC, Kafka Streams, Flink
Confluent Cloud, GitHub Actions, Maven, Nexus
Prometheus, Grafana, DataDog

Team & Environment

The Messaging team is part of over 500 remote-first employees and collaborates closely with mobile, backend, and data teams.

Benefits & Compensation

Compensation range: $148,000 to $216,500 USD
Medical, dental, vision, life and disability insurance plans (100% paid for US employees)
401(k) plan with company matching program in the US and RRSP with DPSP plan for Canadian employees
Employee Assistance Program (EAP) for mental wellness
Flexible PTO and 12 company wide days off throughout the year
Learning & Development programs
Equipment, tools, and reimbursement support for a productive remote environment
Free Life360 Platinum Membership for your preferred circle

Work Mode

This is a fully remote position for candidates located in the USA.

We are an equal opportunity employer and value diversity. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status or any legally protected status.