Job Title: Senior Performance Engineer

Company Name: Capital Rx

Job Url: https://boards.greenhouse.io/embed/job_app?token=5110410008&utm_source=jobright&jr_id=69851805348f733a5c39410c

Job Description: Position Responsibilities: 

In this role, you'll provide technical leadership while delivering hands-on solutions for high-impact performance challenges. You will: 

Own caching infrastructure: Design, implement, and maintain caching architecture using Valkey/Redis (ElastiCache) for high-throughput healthcare applications processing millions of transactions per day. 
Build shared libraries: Develop and evolve caching libraries and patterns used across multiple engineering teams, establishing best practices for cache key design, invalidation strategies, and performance monitoring. 
Partner with engineering teams: Work directly with product teams to design and implement caching solutions tailored to their specific use cases, providing technical guidance and hands-on support during implementation.  
Drive performance optimization: Conduct deep performance analysis using profiling tools to identify bottlenecks beyond caching—database queries, application code, infrastructure—and deliver measurable improvements. 
Establish performance standards: Define performance benchmarks, implement monitoring and alerting, and help teams measure the impact of optimizations through data-driven analysis.  
Contribute to observability: Enhance observability infrastructure (LGTM stack) to track cache hit rates, latency patterns, and system performance metrics across the platform.  
Demonstrate technical leadership: Mentor engineers on performance best practices, lead architecture reviews, and represent the Scalability team in cross-functional planning discussions.
Responsible for adherence to the Capital Rx Code of Conduct, including reporting of noncompliance. 
Required Qualifications: 

10+ years of software engineering experience with demonstrated progression into technical leadership roles. 
3+ years of experience leading technical initiatives, mentoring engineers, or serving as a subject matter expert on complex systems. 
Strong expertise in Python (Flask/SQLAlchemy) for production applications. 
Deep PostgreSQL knowledge: Advanced query optimization, indexing strategies, triggered, stored procedures, plan analysis, and experience with replication and clustering.  
Production caching experience: Proven track record designing and implementing caching strategies at scale using Redis, Valkey, Memcached, or similar technologies. 
Performance optimization expertise: Demonstrated ability to profile applications, identify bottlenecks, and deliver measurable performance improvements (latency reduction, throughput gains, cost savings). 
AWS experience: Production experience with Aurora RDS, Lambda, ElastiCache, EC2, ECS, and S3. 
Systems thinking: Ability to analyze performance across the full stack — application, database, caching, infrastructure — and make architectural tradeoffs. 
Collaboration and communication: Strong written and verbal communication skills with ability to work autonomously while driving proactive collaboration in a remote environment. 
(Optional) Preferred Qualifications: 

Rust development experience or strong interest in learning Rust for high-performance systems.
Infrastructure as code: Experience with Terraform or similar IaC tools for managing cloud infrastructure. 
Observability tools: Hands-on experience with Grafana, Prometheus, Loki, or similar monitoring/alerting platforms.  
High-throughput systems: Background in building systems that handle millions of requests per day with strict SLA requirements.  
Previous Pharmacy Benefits Manager (PBM) or healthcare technology experience.