Senior Software Engineer

About Hello Heart:

Hello Heart is on a mission to change the way people care for their hearts. The company provides the first app and connected heart monitor to help people track and manage their heart health. With Hello Heart, users take steps to control their risk of heart attacks and stroke – the leading cause of death in the United States. Peer-reviewed studies have shown that high-risk users of Hello Heart have seen meaningful drops in blood pressure, cholesterol and even weight. Recognized as the digital leader in preventive heart health, Hello Heart is trusted by more than 130 leading Fortune 500 and government employers, national health plans, and labor organizations. Founded in 2013, Hello Heart has raised more than $138 million from top venture firms and is a best-in-class solution on the American Heart Association's Innovators' Network and CVS Health Point Solutions Management platform. Visit for more information.

About the Role:

We are looking for a Senior Software Engineer with a strong backend orientation who excels at solving complex challenges and is passionate about building robust, scalable, and data-driven systems. In this role, you will work closely with a talented team of engineers, Product, Design, and Data Science to deliver innovative solutions that have a meaningful impact on users' lives.

As a senior engineer, you will take ownership of projects from concept to deployment in a fast-paced, highly collaborative environment. You'll focus primarily on backend development, with the ability to contribute to frontend work as needed. You'll also mentor team members and help drive technical excellence.

Our Technology Stack:

Python, , React Native, Redux, ReactJS, Scala, Play, Microservices, AWS, Docker, Kubernetes, MongoDB, Redis, PostgreSQL, Spark, Elasticsearch, Vector DBs, Kafka, and more.

Responsibilities:

• Backend Development: Design, implement, and maintain scalable, efficient, and secure backend services, with a focus on Python and
• Data Infrastructure: Work with real-time data systems, including Elasticsearch, Vector Databases, and other high-performance storage and retrieval tools.
• End-to-End Feature Development: Deliver features across the stack, integrating frontend and backend components.
• Collaborate with Data Science to integrate advanced algorithms and ML models into production systems.
• Partner with Product Managers and Designers to brainstorm and execute impactful product features.
• Ensure system architecture is reliable, maintainable, and built for scale.
• Lead by example: contribute to code reviews, mentor peers, and foster engineering best practices.
• Stay up to date with emerging technologies and suggest ways to apply them for performance and scalability improvements.

Qualifications:

• 5+ years of professional experience as a Full Stack or Backend Engineer.
• Deep hands-on experience in at least one modern backend language (e.g., Python, , Scala, etc.)
• Proven experience designing and maintaining complex, scalable systems in production—must.
• Experience working with real-time data pipelines, Elasticsearch, and Vector DBs—a strong advantage.
• Experience with Protobuf and gRPC— an advantage.
• Experience working with cutting-edge LLM technologies and frameworks (e.g., LangFuse, LangGraph, etc.)—an advantage.
• Experience with — an advantage.
• Frontend experience with ReactJS or React Native—nice to have.
• Deep understanding of algorithms, data structures, and system optimization.
• Strong experience with both relational and non-relational databases (e.g., PostgreSQL, MongoDB).
• Familiarity with AWS, Docker, Kubernetes
• Excellent collaboration and communication skills, with a proactive and impact-driven mindset.
• BSc in Computer Science or a related field—or equivalent hands-on experience.

Hello Heart has a positive, diverse, and supportive culture - we look for people who are collaborative, creative, and courageous. Oh, and if you want to see some recent evidence of the fun things we do at Hello Heart, check out our Instagram page.