Senior Backend Engineer

Senior Backend Engineer (Go/AWS) – Remote U.S. Join a lean engineering team building production systems around medical-grade wearable physiology data — the APIs, SDKs, cloud infrastructure, auth flows, and data pipelines that help researchers, clinicians, coaches, and enterprise organizations make better decisions about health and performance. This is a hands-on senior backend IC role for a strong Go engineer who can move quickly, reason through distributed systems, and ship reliable software in a compliance-aware environment. You will work within an architecture set by senior technical leaders, own well-scoped backend workstreams end-to-end, and help turn complex biometric data flows into dependable product and platform capabilities. The Opportunity - We are early in our commercial journey and building the kind of engineering team where strong individual contributors have direct impact. - You will not be joining to manage people, own the entire architecture, or build prototypes that never ship. - You will be joining to execute on production-critical backend work across a real health-tech platform spanning firmware, cloud systems, mobile and web applications, developer APIs, and SDK infrastructure. - You’ll work closely with senior technical leaders and help unblock meaningful platform priorities: integrating partner algorithms, improving backend data flows, attaching APIs to existing product capabilities, strengthening infrastructure, and shipping features that support enterprise and consumer-facing use cases. Why This Role Is Worth Your Attention - Work on wearable physiological data systems where reliability and quality matter. - Own real backend work across Go services, APIs, AWS infrastructure, data pipelines, auth systems, and developer-facing surfaces. - Join a fully remote, distributed U.S. team with no specific U.S. location requirement. - Collaborate with experienced technical leaders while staying in a hands-on IC path. - Use modern AI-assisted engineering workflows, including tools such as Claude or Cursor depending on your preferences. - Earn a $160,000 base salary, with final compensation dependent on experience, skill level, and assessment performance. What You Will Own Backend APIs & Services - Design, build, and ship Go-based backend services that support consumer-facing and enterprise-facing product surfaces. - Develop and maintain REST and gRPC APIs, async workers, SDK auth flows, and service integrations. - Translate product and platform needs into simple, reliable, testable backend implementations. Platform Infrastructure & DevOps - Work within and improve AWS infrastructure, including services such as ASGs, Aurora, ElastiCache, SQS, S3, and CloudWatch. - Contribute to CI/CD pipelines, zero-downtime deployment patterns, autoscaling systems, and operational reliability. - Help the platform scale as data volume, enterprise usage, and global infrastructure needs grow. Security & Compliance Engineering - Build and harden authentication and authorization systems, including JWTs, OAuth flows, sessions, and API key management. - Implement backend controls such as rate limiting, audit logging, access control, and secure client-facing data access. - Contribute to a compliance-aware engineering environment, including SOC 2 and HIPAA-related practices. Developer Platform & External APIs - Extend and maintain developer-facing APIs, SDK backend systems, enterprise integrations, and API key workflows. - Help attach APIs to existing and emerging platform capabilities so customers and partners can use data effectively. - Support systems that make biometric data accessible, understandable, and reliable for approved client use cases. Data Systems & Observability - Work across relational and NoSQL databases, data export pipelines, ingestion flows, and structured logging. - Debug performance and reliability issues across distributed components. - Improve observability so the team can understand platform health, trace failures, and resolve issues quickly. B2B Platform & Admin Systems - Build backend capabilities for organization lifecycle management, user provisioning, activation, onboarding, and adherence reporting. - Support multi-organization hierarchy management and enterprise administration workflows. - Help finish important platform features that are currently backlogged because senior engineering capacity is focused elsewhere. What Makes You a Strong Fit - You have strong, production-tested Go engineering experience. - You have built and operated backend services, APIs, and data systems in AWS. - You understand distributed systems well enough to debug issues across services, queues, databases, storage, and client-facing APIs. - You are comfortable with relational and NoSQL databases, messaging or event systems, and infrastructure-as-code workflows. - You have solid authentication and authorization fundamentals, including token lifecycle, session management, OAuth, and API key management. - You can own scoped backend work from definition through deployment without needing close management. - You communicate tradeoffs, progress, and blockers clearly. - You are comfortable working in a lean startup environment where priorities can shift and engineers are expected to keep moving. - You can use AI-assisted coding workflows effectively, including managing multiple coding agents or model-assisted tasks where useful. - You are willing to complete a live coding assessment as part of the process. Nice-to-Haves - Experience in health tech, wearables, biometric data, IoT, or device-connected software. - Background with HIPAA, SOC 2, GDPR, or other compliance-aware engineering environments. - Experience with high-throughput data upload, ingestion, transformation, or export systems. - Developer platform experience, including SDKs, external APIs, enterprise integrations, or API management. - Familiarity with AI/ML platform infrastructure, MCP servers, or model-facing backend systems. - Exposure to mobile-connected systems involving iOS, Android, firmware, or device data flows. What Success Looks Like - You come up to speed quickly on an existing codebase and start shipping useful backend work. - You take ownership of scoped API, infrastructure, auth, data pipeline, and reliability improvements from definition through deployment. - You build software that is simple, maintainable, testable, and appropriate for a compliance-aware platform. - You help senior engineers stay focused by independently knocking out important platform work that has clear context and business value. - You earn trust over time through strong engineering judgment, clear communication, and reliable execution. Location, Work Model & Compensation - Remote / distributed role for candidates in the United States. - Full-time position. - Base salary: $150,000–$170,000 Yearly. - Final compensation depends on experience, skill level, and assessment performance. Compensation - The expected total compensation range is USD 150,000–170,000 Yearly. - At Urrly, fairness matters. We use AI to review every application against the same clear requirements for the role. Candidates are evaluated only on job-related factors such as skills, certifications, and experience, not personal attributes. - Apply now and get a response within 24 hours.