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Senior Payments Engineer — Acquiring & Payment Processing

SezzleArgentina, RemoteDV-Development
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Posted
22 Jun 2026
Status
Open · checked 7d ago

About this role

Role Overview

Sezzle is hiring a remote Senior Payments Engineer based in Argentina to own, build, and scale the core systems behind the company's acquiring and payment-processing infrastructure. This role suits an experienced backend specialist with a passion for fintech, distributed systems, and AI-driven development workflows who wants to shape the future of digital commerce.

Key Responsibilities

Design and develop robust backend services primarily using Golang to integrate smoothly with third-party payment gateways, processors, and card networks.
Manage end-to-end money movement processes, covering transaction authorization, capture, settlement, refunds, reconciliation, and dispute or chargeback management.
Implement fault-tolerant, idempotent, and auditable transaction processing inside a distributed framework using message queues and transactional outbox patterns.
Ensure all operations align with strict PCI DSS compliance guidelines, including secure payment data handling, tokenization, and 3DS/SCA authentication flows.
Monitor financial transaction health metrics, such as system latency, processor performance, decline rates, and settlement accuracy, to drive continuous optimization.
Integrate large language models like Claude directly into everyday engineering routines to fast-track research, coding, system design, testing, and documentation.
Mentor engineering peers, guide technical decisions, and occasionally lead focused project teams to successful delivery.

Requirements

Seven or more years of professional engineering experience with a strong emphasis on backend development, fintech platforms, or complex money-movement systems.
Advanced proficiency in Golang or demonstrable comparable experience using Python to build reliable REST APIs.
Proven hands-on background connecting software with payment processors, acquirers, or gateways, alongside a solid grasp of core payment mechanics like idempotency and tokenization.
Practical experience designing distributed cloud applications leveraging message brokers like Kafka, RabbitMQ, or SQS, alongside transactional outbox architectures.
Demonstrated, active use of Claude or comparable LLM tools to optimize research, communication, and technical productivity.
Bachelor’s degree in Computer Science, Software Engineering, or a closely related technical field.

Nice to Have

Direct professional familiarity with major acquiring ecosystems such as Adyen, Stripe, Marqeta, or Fiserv.
Working knowledge of regulatory standards like PCI DSS, payments compliance, network tokenization, and 3DS/SCA.
Experience applying SQL-based relational databases alongside modern ORM frameworks.
Familiarity with production observability tooling and APM platforms like Datadog, Prometheus, or New Relic.
Background in DevOps, continuous integration and deployment pipelines, and containerized microservices managed via Kubernetes on AWS.
A proven history of shipping commercial payment APIs and aligning technical roadmaps with direct customer feedback.

Skills and Tools

Languages: Golang, Python, TypeScript
Frontend: React, React Native
Cloud and Infrastructure: AWS, Kubernetes, Docker
Databases: MySQL, PostgreSQL, Elasticsearch
Messaging and Architecture: Kafka, SQS, RabbitMQ, REST APIs, Microservices
AI Tools: Claude and equivalent Large Language Models

Salary and Benefits

Monthly gross compensation ranging from $5,000 to $9,500 USD.

About the Company

Sezzle is a mission-driven fintech organization dedicated to financially empowering younger generations by transforming traditional retail and shopping experiences. By blending modern technology with interest-free installment options, Sezzle makes shopping more accessible while driving strong merchant sales conversions and higher average order values.

How to Apply

Interested candidates should submit their application directly on the official Sezzle careers page.

Skills and tech stack

PythonSQLAWSKubernetesReactTypeScriptGolangLLMKafka

Questions candidates ask

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

The gross salary range is between $5,000 and $9,500 USD per month.

Is this job remote, and where must candidates be located?

Yes, this is a remote position based out of Argentina.

What programming languages are primarily used in this role?

Golang is the primary backend language required, with additional exposure to Python and TypeScript depending on the project.

Is experience with AI tools required for this position?

Yes, hands-on experience utilizing Claude or equivalent large language model tools to enhance daily productivity, research, and coding is required.

What core payment processes will the engineer manage?

The engineer will own end-to-end money movement flows including authorization, capture, settlement, refunds, reconciliation, and chargeback or dispute handling.

Ready to apply?

The application is on the official Sezzle careers page.

Apply on company site