RemoteLeaf Logo
Log in Sign up

Senior Payments Engineer — Acquiring & Payment Processing

4 weeks ago
Latin America
Full-time
Senior
Backend Engineer
Software Development
AWS CI/CD Datadog Elasticsearch Git GitLab Go Kafka Kubernetes LLM Microservices MySQL New Relic PostgreSQL Prometheus Python RabbitMQ React React Native REST API SQL TypeScript
Apply Now
Sezzle

Sezzle

Sezzle is a payments company revolutionizing the buy now, pay later experience with interest-free installment plans, empowering consumers and merchants alike.

Diversified Financial Services
251-1K
Founded 2016
View All Jobs 170

Description

  • Design and build Golang backend services that integrate with payment processors, gateways, and card networks.
  • Own end-to-end money-movement flows including authorization, capture, settlement, refunds, reconciliation, and chargeback/dispute handling.
  • Build idempotent, fault-tolerant, auditable transaction processing systems within a distributed architecture.
  • Operate payment systems within PCI DSS scope, including tokenization, network tokens, secure payment-data handling, and 3DS/SCA flows where applicable.
  • Instrument and monitor payment health metrics such as authorization and decline rates, processor performance, latency, and settlement accuracy.
  • Use AI tooling such as Claude and equivalent LLMs in daily work for design, coding, research, testing, and documentation.
  • Partner closely with Product, Risk, Compliance, Support, and engineering teams to deliver scalable solutions.
  • Mentor engineers, unblock peers, and help raise the technical bar across the team.
  • Occasionally lead small project teams to delivery.

Requirements

  • 7+ years of backend or full-stack engineering experience, with meaningful time spent on payments, fintech, or money-movement systems.
  • Strong Go experience preferred, or comparable experience in Python, building and serving REST APIs.
  • Hands-on experience integrating with payment processors, gateways, or acquiring systems.
  • Familiarity with payments fundamentals including authorization versus settlement, tokenization, idempotency, reconciliation, and chargebacks/disputes.
  • Experience with distributed, cloud-based architectures using patterns such as transactional outboxes or queues like Kafka, SQS, or RabbitMQ.
  • Demonstrated hands-on use of Claude or an equivalent large language model to improve productivity, research, and communication.
  • Bachelor's degree in Computer Science, Engineering, or a related field.
  • Experience with SQL-based RDBMS through an ORM tool is preferred.
  • Comfort with observability platforms such as Prometheus, Datadog, or New Relic is preferred.
  • DevOps experience with CI/CD pipelines is preferred.
  • Familiarity with containerized microservice architectures deployed with Kubernetes on AWS is preferred.
  • Demonstrated history of delivering commercial APIs and web applications is preferred.
  • A track record of shipping products and prioritizing improvements based on stakeholder or customer feedback is preferred.

Benefits

  • Salary range of $5,000 - $9,500 per month gross in USD.
  • Remote full-time role.
  • Opportunity to work in an AI-first engineering culture with approved use of Claude and similar tools.
  • Chance to work on high-impact fintech infrastructure at scale.
  • Full-time employment with a senior-level compensation band.

Interested in this position?

Apply directly on the company website

Apply Now

Similar Roles

Epic Games

Senior Backend Engineer, Developer Platform (Horde)

Epic Games 5K-10K Internet Software & Services

Epic Games is hiring a senior programmer for its Unreal Engine developer platform team to work on Horde, the internal platform that supports CI/CD, remote execution, build health, storage, and developer workflows.

United States Canada Full-time Senior Backend Engineer
$173k-$279k
AWS Azure C# CI/CD gRPC MongoDB .NET Redis
15 hours, 15 minutes ago
Coupang

Senior Staff Back-end Engineer (eCommerce Engineering)

Coupang 1K-5K Internet Software & Services

Coupang is hiring a Senior Staff Backend Engineer to lead the architecture and technical strategy for its core e-commerce platform services across global markets.

South Korea Full-time Lead Backend Engineer
Apache Airflow Apache Spark AWS Cassandra Grafana Java Kafka Kotlin Kubernetes Microservices OpenTelemetry Prometheus Spring
15 hours, 30 minutes ago
Mindrift.ai: Be the “I” in AI

Senior Python Engineer - AI Coding Agent Evaluation (Freelance)

Mindrift.ai: Be the “I” in AI Internet Software & Services

Mindrift is seeking an experienced software developer to create and evaluate project-based tasks for benchmarking AI coding agents in realistic simulated development environments.

Morocco Algeria Tunisia Egypt Part-time Lead AI (Artificial Intelligence) Backend Engineer
Up to $0k
Docker FastAPI JavaScript Kafka PostgreSQL Python React Redis TypeScript
16 hours ago
Mindrift.ai: Be the “I” in AI

Senior Python Engineer - AI Coding Agent Evaluation (Freelance)

Mindrift.ai: Be the “I” in AI Internet Software & Services

Mindrift is seeking an experienced software developer to create and evaluate realistic coding tasks for AI agents in project-based work for leading tech companies.

United Kingdom Part-time Lead AI (Artificial Intelligence) Backend Engineer
Up to $416k
Docker FastAPI JavaScript Kafka PostgreSQL Python React Redis TypeScript
16 hours ago

You're on a roll! Sign up now to keep applying.

Sign Up

Already have an account? Log in

Used by 14,729+ remote workers