Principal Software Engineer
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<h2><strong>Company Overview</strong></h2>
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<p>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. </p>
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<p>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.</p></div><p> </p>
<p class="font-claude-response-body break-words whitespace-normal leading-[1.7]"><strong>Team Summary</strong></p>
<p class="font-claude-response-body break-words whitespace-normal leading-[1.7]">We're looking for a Principal Software Engineer who keeps a large, distributed platform fast, stable, and efficient as load and complexity grow. This is a role based in our Stockholm office, embedded in a team that owns and operates what it builds.</p>
<p class="font-claude-response-body break-words whitespace-normal leading-[1.7]"><strong>What You'll Do</strong></p>
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<li class="font-claude-response-body whitespace-normal break-words pl-2">Own projects end-to-end from an architectural standpoint - driving them independently from requirement-gathering through design, delivery, and operation, with minimal oversight.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Gather and validate requirements, translate them into high-level and low-level designs, and raise the quality bar on designs produced by others.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Make, document, and review architectural decisions, articulating trade-offs clearly to both technical and non-technical stakeholders.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Own non-functional attributes - performance, stability, scalability, and availability - and ensure systems meet internal standards.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Profile real production systems, identify bottlenecks, manage memory and resource usage, and tune latency and throughput across distributed, event-driven services.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Level up the people around you - share knowledge, review designs, and influence both technical and business decisions in the right direction.</li>
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<p class="font-claude-response-body break-words whitespace-normal leading-[1.7]"><strong>What You'll Need</strong></p>
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<li class="font-claude-response-body whitespace-normal break-words pl-2">Senior-level experience building and operating production software.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">A track record of architecting, building, and running distributed systems at real scale: cloud, Kubernetes, event-driven architectures.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Strong performance-engineering background: profiling, benchmarking, memory management, concurrency, and tuning systems under real production load.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">The ability to make architectural decisions and explain trade-offs to engineers and non-engineers alike.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Strong fundamentals: system design, data structures, concurrency, and API design.</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Clear communicator who enjoys making the people around them better.</li>
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<h4>Why Join</h4>
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<li>Deep, hands-on exposure to how complex investment software is built and run alongside our multidisciplinary team which is based out of the same office in Stockholm.</li>
<li>Work on a modern, open, cloud-native platform with the collaboration and humility of the team Limina was built on.</li>
<li>Flexible hybrid working and a modern office in central Stockholm, with a global platform and client base behind you.</li>
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<p><strong>Recruiting Security<br></strong>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 <a href="mailto:careers@arcesium.com">careers@arcesium.com (US/UK),</a> <a href="mailto:careers-india@arcesium.com">careers-india@arcesium.com (India) </a>or <a href="mailto:careers-europe@arcesium.com">careers-europe@arcesium.com (Portugal/Sweden)</a>. </p>
<p><em>Arcesium is an equal opportunity employer.</em></p></div>
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