Performance Engineer | 7+ Years

• Role- Performance Engineer
• Location- St. Louis, MO
• Experience Required- 7 years of experience in Performance Engineering/ Performance Tuning.

Job Overview

The Performance Engineering team is looking for an experienced professional to identify and resolve end-to-end performance bottlenecks across distributed systems, Spring Boot services, middleware components, and hybrid cloud environments (Private Cloud AWS).

This role goes beyond traditional performance testing by analyzing container orchestration, networking, and system interactions under load. The ideal candidate will define realistic latency budgets, establish Service Level Objectives (SLOs), map end-to-end workflows, and ensure optimal system performance across high-scale, high-transaction environments such as financial services, payment platforms, or large enterprise SaaS applications.

Key Responsibilities

• Define Service Level Objectives (SLOs), performance budgets, and latency/throughput targets across distributed services.
• Design and implement distributed tracing strategies using tools such as Dynatrace and AWS X-Ray.
• Perform deep-dive performance analysis using heap dumps, thread dumps, flame graphs, GC logs, network traces, and storage I/O profiling.
• Review application and system architectures to identify performance bottlenecks and optimization opportunities.
• Lead root cause analysis for production and pre-production performance issues.
• Develop capacity models and performance baselines for cloud-based applications.

Required Technical Skills

• Strong knowledge of Spring Boot, JVM tuning, thread/heap management, concurrency debugging, and GC optimization.
• Hands-on experience with Docker, PCF, and container resource management.
• Experience with orchestration platforms such as Kubernetes, PCF, and Amazon ECS.
• Strong understanding of networking concepts including service-to-service communication, TLS, DNS, routing, load balancers (F5, NGINX, ALB/NLB), and service mesh performance.
• Experience with storage performance tuning, IOPS optimization, and distributed file systems.
• Expertise in caching and messaging technologies such as Redis, Hazelcast, Kafka, RabbitMQ, and NATS.
• Strong database performance tuning experience, including connection pooling, indexing, slow query analysis, and replication.
• Hands-on experience with AWS infrastructure, including compute, storage, networking, regional latency, and cross-cloud traffic optimization.

Preferred Background

• Experience working on high-scale, multi-region, high-transaction platforms such as financial systems, payment processing, or enterprise SaaS applications.
• Strong troubleshooting, analytical, and performance optimization skills across distributed cloud environments.

Note- This is a hybrid role requiring 3–4 days onsite per week.

APEXON : Our Commitment to Diversity & Inclusion: Did you know that Apexon has been Certified by Great Place To Work®, the global authority on workplace culture, in each of the three regions in which it operates: USA (for the fourth time in 2023), India (seven consecutive certifications as of 2023), and the UK. Apexon is committed to being an equal opportunity employer and promoting diversity in the workplace. We take affirmative action to ensure equal employment opportunity for all qualified individuals. Apexon strictly prohibits discrimination and harassment of any kind and provides equal employment opportunities to employees and applicants without regard to gender, race, color, ethnicity or national origin, age, disability, religion, sexual orientation, gender identity or expression, veteran status, or any other applicable characteristics protected by law. You can read about our Job Applicant Privacy policy here Job Applicant Privacy Policy (apexon.com)

Our Commitment to Environment:

Actively contribute to Apexon's commitment to environmental responsibility by following sustainable practices and supporting ESG initiatives.

Our Perks and Benefits:

Our benefits and rewards program has been thoughtfully designed to recognize your skills and contributions, elevate your learning/upskilling experience and provide care and support for you and your loved ones. As an Apexon Associate, you get continuous skill-based development, opportunities for career advancement, and access to comprehensive health and well-being benefits and assistance.

We also offer:

• Term Insurance and Accident Insurance
• Group Health Insurance covering family of 4
• Paid Holidays & Earned Leaves
• Paid Parental Leave
• Learning & Career Development
• Employee Wellness