Senior Backend Engineer — Scalable Data APIs (Node/GraphQL)

Energy Jobline ZR; California; On-site; USD 140,000 - 180,000; Full time

Benefits offered by this job

RSUs

Employer-paid medical, dental & vision

401(k) with company match

Unlimited PTO

Performance bonus

Job summary

Energy Jobline ZR in San Diego, CA seeks a Senior Backend Software Engineer to build scalable backend services and data infrastructure powering a HealthTech platform. You will own backend/API design and data systems, collaborating with product leaders, clinicians, and engineers to solve complex workflows.

You’ll architect data models, optimize PostgreSQL, and design GraphQL schemas with a focus on reliability, performance, and scalability in a cloud-first environment.

Qualifications

• 7+ years of software engineering experience with a strong backend focus.
• Proven experience building production-grade backend services, APIs, and data-intensive applications.
• Expert Node.js / server-side JavaScript.
• Strong experience with Java and/or Kotlin, preferably Spring Boot.
• Deep PostgreSQL expertise, including schema design, query optimization, indexing, and performance tuning.
• Strong GraphQL experience, including schema design and API architecture.
• Experience building cloud-first applications on AWS, GCP, or Azure.
• Strong understanding of software architecture, design patterns, data structures, and engineering fundamentals.
• Experience with CI/CD and modern DevOps practices.
• Education: BS in Computer Science or related field, or equivalent experience.
• Healthcare/medical device software or regulated environments experience is a plus.

Responsibilities

• Design and build scalable backend services and APIs using Node.js, GraphQL, and Java/Kotlin with Spring Boot.
• Design and optimize data models and PostgreSQL databases, including schema design, complex queries, indexing, migrations, and performance.
• Build systems that handle complex clinical and operational data with high accuracy, reliability, and performance.
• Design GraphQL schemas and APIs for scalability, maintainability, and performance.
• Participate in architecture, technical design, and code reviews and help shape engineering standards.
• Troubleshoot complex production issues and drive root cause analysis.
• Collaborate with product and engineering teams to translate complex requirements into effective technical solutions.
• Mentor engineers and contribute to a strong engineering culture.

Skills

Node.js

Java/Kotlin

PostgreSQL

GraphQL

7+ years experience

CI/CD

Debugging

Cloud experience (AWS/GCP/Azure)

Education

BS in Computer Science or related field

Tools

Spring Boot

JPA

Prisma

Job description

Energy Jobline ZR in San Diego, CA seeks a Senior Backend Software Engineer to build scalable backend services and data infrastructure powering a HealthTech platform. You will own backend/API design and data systems, collaborating with product leaders, clinicians, and engineers to solve complex workflows.

You’ll architect data models, optimize PostgreSQL, and design GraphQL schemas with a focus on reliability, performance, and scalability in a cloud-first environment.