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Senior Payments Engineer — Acquiring & Payment Processing

SezzleLatin AmericaDV-Development
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Salary
Not listed
Job type
Full-time
Posted
22 Jun 2026
Status
Open · checked 7d ago

About this role

Sezzle is hiring a Senior Payments Engineer based in Latin America to own and scale the vital systems powering its acquiring and payment-processing infrastructure. This backend-focused role is well-suited for an experienced engineer passionate about building robust financial technology and driving seamless consumer transaction journeys.

Role Overview

The Senior Payments Engineer will take complete ownership of backend services that connect with external processors, gateways, and card networks. Working closely with Product, Risk, Compliance, and Support teams, the individual in this position will deliver scalable solutions for complex challenges surrounding transaction authorization, settlement, reconciliation, and disputes. Responsibilities also include mentoring fellow engineers, guiding small project teams, and integrating advanced AI tools into daily workflows to optimize engineering productivity.

Key Responsibilities

Design and construct backend services primarily using Golang to integrate smoothly with payment gateways, processors, and card networks.
Manage the entire lifecycle of critical money-movement operations, covering authorizations, captures, settlements, refunds, reconciliations, and chargeback handling.
Implement fault-tolerant, idempotent, and auditable transaction processing inside distributed system architectures utilizing message queues like Kafka, SQS, or RabbitMQ.
Ensure adherence to PCI DSS standards through secure handling of payment data, tokenization methods, network tokens, and 3DS/SCA procedures.
Monitor and evaluate payment health indicators, such as processor latency, authorization or decline percentages, and settlement precision.
Utilize large language models like Claude daily for development, architecture design, research, and documentation while obeying internal security parameters.
Mentor teammates and contribute to elevating the technical capabilities and standards across the engineering department.

Requirements

Seven or more years of professional experience in backend or full-stack software development, with a strong focus on fintech, payments, or money-movement ecosystems.
Proficiency in Go, or equivalent practical experience using Python to build and serve RESTful APIs.
Direct, hands-on background connecting software with payment gateways, acquiring systems, or payment processors.
Deep understanding of core financial concepts including authorization, settlement, idempotency, tokenization, chargebacks, and reconciliation.
Practical experience designing distributed and cloud-native systems implementing transactional outbox patterns or queuing technologies.
Demonstrated capability using Claude or comparable large language models to boost daily productivity, communication, and research.
Bachelor's degree in Computer Science, Engineering, or a related field of study.

Nice to Have

Direct working knowledge of payment acquiring platforms like Adyen, Stripe, Marqeta, or Fiserv.
Familiarity with PCI DSS regulations, 3DS/SCA frameworks, network tokenization, and compliance.
Competency with SQL-based relational databases using Object-Relational Mapping tools.
Experience with observability instruments and monitoring dashboards like Prometheus, Datadog, or New Relic.
Background in DevOps practices, CI/CD pipelines, and deploying containerized microservices via Kubernetes on AWS.
A proven history of releasing commercial payment APIs and driving improvements based on stakeholder feedback.

Skills and Tools

Programming Languages: Golang, Python, TypeScript, Golang
Architecture & Messaging: Distributed systems, Kafka, SQS, RabbitMQ, REST APIs, Microservices
Cloud & DevOps: AWS, Kubernetes, CI/CD pipelines, Git
Databases: MySQL, Postgres, Elasticsearch, SQL RDBMS, ORM
Artificial Intelligence: Claude and other large language models for productivity and code acceleration

Salary and Benefits

The monthly gross salary for this position ranges from $5,000 to $9,500 USD, reflecting the advanced technical skills, leadership abilities, and level of experience required for the role.

About the Company

Sezzle operates with a mission to financially empower younger generations by redefining the modern shopping experience through transparent, interest-free installment options. The organization builds an innovative fintech environment that drives merchant sales conversions and higher order values while encouraging a culture of high standards, open-source adoption, and calculated risk-taking.

How to Apply

Interested candidates should visit the official Sezzle careers page to submit an application for this opportunity.

Skills and tech stack

PythonSQLAWSKubernetesReactTypeScriptGolangLLMKafka

Questions candidates ask

What is the salary range for the Senior Payments Engineer position?

The gross salary for this role ranges from $5,000 to $9,500 USD per month.

Where is the position located?

The role is based in Latin America.

What programming languages are required or preferred?

Strong Go (Golang) experience is preferred, or comparable experience using Python for building and serving REST APIs.

How is AI used at Sezzle?

Sezzle runs an AI-first engineering culture where developers use tools like Claude daily to accelerate design, coding, research, and documentation, ensuring cardholder data and secrets remain secured.

What level of experience is required for this role?

Candidates must have 7+ years of backend or full-stack engineering experience, specifically focusing on payments, fintech, or money-movement systems.

Ready to apply?

The application is on the official Sezzle careers page.

Apply on company site