Principal Engineer, Backend Architecture and Reliability (.NET or Java)
About You You're a force multiplier. You can stabilize a platform, modernize it safely, and raise the engineering bar across multiple teams. You're hands-on, you sweat reliability details, and you drive alignment without slowing delivery. About the role This Principal-level role focuses on stability, reliability, and modernization across our backend systems. You will set technical direction across teams, lead modernization efforts that reduce fragility and operational load, and partner with engineering leadership to improve uptime, incident outcomes, and delivery velocity. This is a build role: you will write and ship code. What you'll do • Lead architecture and implementation to improve stability and reliability across core backend systems. • Drive modernization: reduce legacy debt, simplify services, and migrate to scalable patterns with minimal customer impact. • Establish reliability guardrails: service ownership, operational runbooks, and measurable targets for availability and performance. • Partner with DevOps/SRE and application teams to improve observability, incident response, and postmortem follow-through. • Identify bottlenecks and failure modes; deliver measurable improvements in latency, throughput, and availability. • Create reusable patterns and reference implementations (service templates, resilience patterns, data access patterns). • Mentor senior engineers and tech leads; raise standards through design docs, reviews, and coaching. Qualifications • 10+ years building production backend systems; demonstrated impact at Staff/Principal scope. • Deep experience in .NET (C#) and/or Java service ecosystems, including performance tuning and production operations. • Proven track record improving reliability (incident reduction, MTTR improvement, uptime). • Strong experience modernizing legacy systems: incremental migrations, deprecation plans, and risk-managed rollouts. • Distributed systems fundamentals and resilience patterns (timeouts, retries, circuit breakers, idempotency). • Strong operational discipline: logs/metrics/traces, alerting strategy, and root cause analysis. • Clear communicator who can align multiple teams and drive decisions. Nice to have • Payments, billing, invoicing, or other high-volume transactional domains. • Event-driven architecture experience (queues/streams; async workflows). • Cloud cost and performance optimization experience at scale. • Logistics, cargo, or supply chain experience. • Spanish language proficiency. Compensation and benefits We offer competitive pay and benefits designed to fuel our team's success. • Health and Wellness: Medical, dental, and vision plans for you and your family • Future-Ready: 401(k) with company match • Work Life Balance: Generous flexible PTO program and paid holidays • Grow With Us: Professional development opportunities #LI-Remote Does this role sound like the next step in your career? We’d love to hear from you! If you don’t meet all of the requirements exactly, we encourage you to use your cover letter to tell us about your unique experience—talent comes from many places, and skills are transferable. Our Commitment to an Extraordinary Work Environment At CargoSprint, we value diversity and inclusivity. We strive to create a welcoming and supportive community for employees from all backgrounds. Regardless of your gender, sexual orientation, physical ability, religion, ethnicity, race, or age, you will find a place where you can thrive and be your authentic self. Our CargoSprint Recruitment Team personally reviews every application. Apply tot his job