Principal Infrastructure Engineer

🔥 1 hour ago

🇪🇸 Spain – Remote

💵 $12.5k - $20.8k / month

⏰ Full Time

🔴 Lead

👷 Infrastructure Engineer

👻 Ghost score 21%

What it means: the chance that no one is really hiring for this job.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Sezzle

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2016

💳 Fintech

👥 B2C

🛍️ eCommerce

Fintech • B2C • eCommerce

Sezzle is a financial technology company that offers a "buy now, pay later" service, allowing consumers to purchase products and pay for them in four interest-free installments over six weeks. The Sezzle app provides users with a flexible financing alternative to traditional credit cards, enabling instant approval decisions without impacting credit scores. Sezzle partners with various top brands, including Amazon, Walmart, and Target, to offer in-app and in-store payment options. The company's mission is to empower consumers financially by providing more financial freedom and control. It is available as a mobile app, with millions of downloads and high user ratings, and works towards accessibility and inclusion on its platform.

📋 Description

• Design, build, operate, and scale the platform powering Sezzle • Own complex technical initiatives from architecture and prototyping through implementation, production rollout, and ongoing operation • Identify system limits and implement infrastructure improvements for increasing traffic, data volume, and workload complexity • Build capacity models, run load and stress tests, and diagnose compute, networking, Kubernetes, and database bottlenecks • Design resilient AWS account, IAM, network, and service architectures • Build and operate the Kubernetes platform, including lifecycle automation, workload isolation, resource allocation, autoscaling, upgrades, and deployment reliability • Scale and optimize Aurora RDS for MySQL and Postgres, including queries, indexes, connections, replication, failover, schema changes, and migrations • Define and instrument service-level objectives and error budgets; implement failure isolation, backpressure, load shedding, and safe retries • Participate in on-call rotation and lead technical recovery during serious incidents and outages • Design, test, and document disaster recovery, backup, restore, and failover mechanisms • Build infrastructure-as-code and operational automation to eliminate manual work • Improve observability through metrics, logs, traces, dashboards, and actionable alerts • Deliver safe infrastructure migrations with phased rollouts, validation, and rollback paths • Improve cloud cost efficiency through resource right-sizing, utilization, autoscaling, and storage optimization • Build and evaluate AI-assisted tooling for incident investigation, runbooks, anomaly analysis, and repetitive operations • Write architecture proposals, evaluate technology tradeoffs, review shared-infrastructure changes, and document system operation and failure • Report to engineering leadership and collaborate with application engineers, Security, and Compliance

🎯 Requirements

• Bachelor's degree in Computer Science or a similar technical field (required) • 12+ years of experience across infrastructure, platform, site reliability, software development, or related engineering disciplines • Deep production expertise with AWS, including compute, IAM, multi-account architectures, networking, VPC design, and private connectivity • Deep production expertise with Kubernetes; EKS experience strongly preferred • Deep expertise with RDS/Aurora for MySQL and/or Postgres at scale • Track record of personally delivering infrastructure scaling improvements • Strong coding and automation skills using Golang, Python, or similar languages • Infrastructure-as-code experience with Terraform or equivalent • Strong systems fundamentals in Linux, networking, DNS, TLS, storage, concurrency, and distributed-system failure modes • Experience operating 24/7 high-availability platforms with hands-on incident response and postmortem remediation • Willingness to participate in an on-call rotation • Experience implementing and testing disaster recovery against defined recovery objectives • Practical experience with observability, load testing, capacity planning, and safe CI/CD practices • Active use of AI tooling in engineering or operations • Ability to carry ambiguous technical problems through production delivery and collaborate across engineering disciplines • Preferred: fintech, payments, or banking experience; multi-region architectures; chaos engineering; Prometheus, Grafana, Loki, Tempo; internal platform capabilities; AI-assisted operational automation

🏖️ Benefits

• Competitive gross monthly compensation • Opportunity to work with cutting-edge fintech, payment, and retail technology • Remote work (job tagged #Li-remote) • Collaboration with international teams and technical domains • Exposure to AI-assisted infrastructure and SRE tooling • Open-source-focused technology environment • Employee culture involving musicians, yogis, cyclists, chefs, golfers, dog-lovers, and rock-climbers

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