Principal Software Engineer

Principal Software Engineer 

About the Role 

Life Line Screening is seeking a confident and visionary Principal Engineer – Application & Cloud Architecture to shape the future of technology at Life Line Screening. This role is ideal for a full-stack engineer with deep experience architecting cloud-first solutions in AWS, a passion for solving customer pain points, and a drive to build scalable, modern applications. You’ll lead the transformation of our core platform, guiding multiple engineering teams as they build and maintain the applications that power Life Line Screening’s digital experiences—from customer interactions to clinical and operational systems. You’ll present strategic recommendations to executive leadership and ensure our platform is built for scale, security, and innovation. 

We’re looking for someone with conviction—clear technical vision, confident decision-making, and the ability to inspire teams toward bold, forward-thinking solutions. You thrive in ambiguity, take initiative, and bring creative solutions to complex challenges. You’re resourceful, collaborative, energized by change and thrive in a culture built on agility, experimentation, and big ideas. 

At Life Line Screening, we’re more than a technology company—we’re a mission-driven organization making a measurable impact on public health. As the nation’s largest mobile preventive health provider, we screen over 600,000 people annually at more than 14,000 community-based events. Our innovative approach bridges the gap between under-recognized disease and clinical care, and our growing role in clinical trials and research is helping advance medical science. If you thrive in a collaborative culture and want to help millions of people gain insight into their health, this is the place for you. 

Key Responsibilities 

Application Architecture & Development Leadership 

• Define and drive backend architecture using patterns such as event-sourced systems, event stores, and domain-driven design to ensure traceability, modularity, and scalability. 

• Architect event-driven systems using Amazon EventBridge to enable decoupled service communication and real-time responsiveness across distributed applications. 

• Lead full-stack development with TypeScript, Node.js, and React, emphasizing modularity and performance. 

• Design and deliver production-quality APIs and microservices with a customer-first mindset ensuring maintainability, seamless integration, and reliability. 

• Provide expert guidance on emerging security technologies and ensure compliance through secure design. 

• Champion agile practices and a culture of continuous improvement. 

Cloud Strategy & Enablement 

• Lead AWS cloud engineering from design through delivery, aligning infrastructure with product and business needs. 

• Build and evolve cloud infrastructure to support scalability, reliability, and performance across distributed systems. 

• Engineer immutable infrastructure using IaC and CI/CD pipelines, accelerating platform maturity through reusable components, prototypes, and cloud-native design patterns. 

Collaboration, Mentorship & Innovation 

• Serve as a lead engineer and strategic technical consultant, partnering with stakeholders across the organization to align cloud transformation efforts with business goals. 

• Contribute to technical documentation, knowledge sharing, and proof-of-concept development. 

• Champion the adoption of AI-assisted development tools (e.g., GitHub Copilot) to enhance engineering workflows, code quality, and team productivity through responsible and effective integration. 

• Continuously explore emerging technologies and recommend adoption where appropriate. 

Technical Skills 

Languages & Frameworks – JavaScript, TypeScript, Node.js, React, GraphQL 

Cloud & Infrastructure – AWS, AWS EventBridge, AWS Lambda, Amazon API Gateway, Amazon SQS/SNS, Serverless architecture, Cloud-native design patterns 

Architecture & APIs – Apollo GraphQL Federation, Microservices, Event-sourced systems and event stores, Domain-driven design, RESTful APIs 

DevOps & CI/CD – Infrastructure as Code, AWS CDK, CI/CD pipelines, GitHub Actions 

AI & Innovation – GitHub Copilot, AI-augmented development, Prompt engineering 

Observability & Monitoring – AWS CloudWatch, AWS X-Ray, Logging and alert