Senior Software Engineer - Platform & Infrastructure

AWS / Pulumi IaC

PostgreSQL (RDS), ECS, Docker

Temporal

Python (FastAPI, SQLAlchemy)

Datadog, PagerDuty, GitHub Actions

Auth0, Vanta, Fern

5+ years of software engineering experience, with significant time spent on infrastructure, platform, or reliability-focused work in a production environment.

Deep fluency with cloud infrastructure (ideally AWS), infrastructure-as-code (Pulumi, Terraform, or similar), and modern CI/CD pipelines.

A security mindset: you treat security as a first-class concern in everything you build, even if you don't come from a dedicated security background. Familiarity with frameworks such as SOC 2, compliance tooling such as Vanta, and concepts such as secrets management, key rotation, and least-privilege access is a plus.

Hands-on experience with a modern observability stack (Datadog, Prometheus + Grafana, the Elastic stack, or equivalent), and a track record of setting observability and monitoring standards that translate into actionable insights for product teams downstream. You've also defined SLOs, run postmortems, and improved the on-call experiences you've personally experienced.

Comfortable owning systems end-to-end, from the IaC that provisions them to the runbooks that recover them.

Experience working in or alongside small, fast-moving engineering teams, with a track record of making them faster and more reliable rather than introducing process drag.

Excellent communication skills. You can explain a network topology to a non-engineer and a production incident to a CEO with equal clarity.

High level of empathy, integrity, and calmness under pressure.

You're excited by the prospect of being the founding Platform Engineer at a fintech company where your work directly determines what we can safely ship. You’re the kind of IC who thrives on shipping infrastructure that other engineers love to build on.

The caliber and character of the ModernFi team set us apart.

We value competence and drive over experience and seek compassionate people with diverse backgrounds. We appreciate technical ability, dedication, and humble confidence. Above all, we value respect – respect for our colleagues, clients, partners, and ourselves.

Our team pushes each other to be better every day, supports each other when challenges arise, and grows together on this journey. Because we are a close-knit team, we are selective and considerate with every hire.

The people at ModernFi could be doing anything in the world, yet they choose to be here.

During the recruitment process, you’ll meet the our leadership team and, provided conversations go well, will be invited to an onsite presentation.

We are excited to get to know you, learn about what motivates you, and ensure that we can accelerate your personal and professional growth.