Senior Software Engineer - Infrastructure

arcesiumllc

New York

Posted Jul 28, 2026

Other
Hybrid
Technology

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Job description

Company Overview

Arcesium is a global financial technology firm that solves complex data-driven challenges faced by some of the world’s most sophisticated financial institutions. We constantly innovate our platform and capabilities to meet tomorrow’s challenges, anticipate the risks our clients encounter, and design advanced solutions to help our clients achieve transformational business outcomes.

Financial technology is a high-growth industry as change and innovation continue to disrupt the status-quo and prompt major transformation. Arcesium is at a particularly interesting time in our own growth as we look to leverage our successfully established market position and expand operations in pursuit of strategic new business opportunities. We value intellectual curiosity, proactive ownership, and collaboration with colleagues, and we empower you to meaningfully contribute from day one and accelerate your professional development.

Position Summary

Arcesium seeks an accomplished Senior Software Engineer to join our Infrastructure Engineering organization, the team that builds and operates the core foundation Arcesium's applications run on. You’ll bring a deep commitment to reliability, scalability, and performance — and Infrastructure is where that commitment carries the furthest: a change made once, at the foundation, takes effect across the entire engineering organization.

In this role you'll work across multiple functional areas within Infrastructure — including Developer Experience (AI, Observability, SDLC), Cloud Account Management, Compute, Connectivity, Customer Integration, Security, and Solutions Architecture — all built on top of AWS and Linux. You'll own one or more subsystems or services, delivering high-quality work both individually and as part of a collaborative team.

You must demonstrate high agency: combining systems thinking, a bias to action, and the willingness to challenge assumptions to assess and address the infrastructure needs, challenges, and concerns of engineering teams across Arcesium.

Responsibilities

Build and operate reliable, well-instrumented infrastructure services — spanning all of Infrastructure’s functional areas — that other engineers and our customer-facing applications depend on for high availability
Strengthen our compute platform, leveraging AWS and Kubernetes
Craft tools and automated solutions that streamline processes, reduce toil, and improve efficiency — applying modern tooling and, where it fits, GenAI to accelerate how infrastructure is built and operated
Take ownership of critical technology infrastructure built on top of multiple underlying technologies, tools, and programming languages
Drive process improvements and evangelize engineering best practices; help define and track the metrics that ensure we are prioritizing work that has the most impact
Act as a member of the broader Infrastructure organization at Arcesium, which provides the foundation upon which our customer-facing Platform runs

Qualifications

3–5+ years of relevant infrastructure experience. However, we are interested more in what you've done, can do, and can grow to do, rather than the number of years you've been working.
A proven track record of ownership of critical infrastructure systems and delivery of features that measurably improve reliability and efficiency. You have owned and operated systems such as Kubernetes, cloud infrastructure, DNS, or authentication services.
Polyglot programming capability, with advanced ability in at least one language. We expect engineers within Infrastructure to be proficient and prolific software engineers. Languages in our ecosystem include Python, Java, Go, and Bash.
Experience running critical workloads in AWS is highly valued.
An ability to balance delivery with correctness, delivering timely solutions that are properly risk-managed for the needs of the business.
A curious mind, enthusiasm for technology infrastructure, strong collaboration and communication skills, and the drive to take initiative with the right combination of independence and teamwork

Not all strong candidates will meet every single qualification as listed. We encourage you to apply if you are interested in this work, even if your experience doesn't precisely match the job description. Your skills and passion will stand out, especially if your background is unconventional.

The expected annual base salary for this position is $175,000 - $210,000. Our compensation package includes variable compensation in the form of a year-end bonus, guaranteed in the first year of hire, benefits including medical and prescription drug coverage, and 401k contribution matching.

The applicable annual base salary paid to a successful applicant will be determined based on multiple factors including without limitation the nature and extent of prior experience and educational background. #LI-JS1 #LI-hybrid

Arcesium's Personal Data Privacy Notice for Candidates is linked here.

Recruiting Security
Emails from genuine Arcesium recruiters who are employees of the company will always come from the @arcesium.com domain. In some cases, you may also be contacted by independent search firms engaged to recruit on our behalf; emails from their employees should always come from their firm's applicable domain. We'll never ask for your banking information or any payment as part of the recruiting process. If something seems off or you're contacted by an unexpected third party, please reach out to us at careers@arcesium.com (US/UK), careers-india@arcesium.com (India) or careers-europe@arcesium.com (Portugal/Sweden).

Arcesium is an equal opportunity employer.