Senior Software Engineer - Elixir

JOB SUMMARY

Green Light is a healthcare technology company focused on helping health plan dollars go as far as possible. Our systems operate on large-scale healthcare data and require high reliability, correctness, and performance.

We are hiring a Senior Software Engineer to design, build, and operate production systems using an Elixir-based stack. This role is ideal for engineers who prefer server-driven architecture, value system simplicity, and enjoy solving complex problems under real-world constraints. This is a full-stack role.

You will have significant ownership over system design, performance, and reliability, and will help shape the long-term technical direction of the platform.

WHAT YOU’LL DO

• Design, build, and operate production systems using Elixir, OTP, and Phoenix

• Own services end-to-end: architecture, implementation, deployment, and production support

• Build interactive user interfaces

• Design and evolve systems for high-throughput data processing

• Work with relational database systems

• Improve system performance, observability, and reliability in production

• Participate in incident response, debugging, and root cause analysis

• Contribute to architectural decisions with a focus on long-term maintainability

• Collaborate across engineering, product, and operations to deliver high-impact features

• Mentor engineers and contribute to a strong engineering culture

• Apply secure coding practices and ensure systems meet healthcare data privacy and security requirements

WHAT WE’RE LOOKING FOR

• Strong production experience with Elixir, including OTP and BEAM fundamentals

• Experience building applications with Phoenix (LiveView experience is a plus)

• Experience with Git-based version control workflows and source code management platforms, including branching strategies and merge/pull request processes

• Familiarity with agile development practices, including sprint planning, backlog refinement, and iterative delivery

• Experience working with CI/CD pipelines - maintaining, troubleshooting, and supporting automated build and deployment workflows

• Ability to write clear, well-scoped tickets and manage work items throughout the development lifecycle

• Experience designing and operating distributed systems or high-reliability services

• Experience working with relational databases in production environments

• Strong understanding of functional programming principles

• Experience building APIs and backend systems

• Experience conducting peer code reviews and providing constructive, actionable feedback

• Ability to reason about performance, concurrency, and system trade-offs

• Comfortable owning production systems, including incident response

• Experience working in Linux-based or containerized environments, including Docker

TEAM & CULTURE

• Tight-knit, collaborative team of engineers across multiple disciplines

• Close partnership between application and data-focused engineers

• Strong emphasis on cross-functional learning and shared ownership

• Culture of pragmatic problem-solving, accountability, and continuous improvement

WHAT TO EXPECT IN YOUR FIRST 90 DAYS

You will play a key role in building new functionality and supporting a platform to assist health plans in managing negotiation and dispute resolution workflows in a regulated healthcare environment.

This includes:

• Designing and implementing systems on top of large-scale data platforms

• Building performant workflows for analyzing and comparing complex reimbursement scenarios

• Partnering with domain experts to translate regulatory and operational requirements into robust software systems

This is a high-impact system with meaningful design ownership, built on top of substantial data assets.

WHAT TO EXPECT

• Primarily server-driven web architecture using Elixir and Phoenix

• Systems designed for correctness, auditability, and reliability

• Emphasis on pragmatic engineering over trend-chasing

• Work involves complex, real-world data and domain constraints

NICE TO HAVE

• Experience working with very large datasets or data-intensive systems

• Familiarity with observability tooling (metrics, tracing, logging)

• Experience in healthcare or other regulated domains

• Exposure to interoperability standards (e.g., claims, EDI, HL7, FHIR)