Félix · 3 weeks ago
Senior Software Engineer (Systems Performance)
United States
Full-time
Remote
Senior Level
5+ years expFélix is building a financial ecosystem for Latin immigrants in the U.S. and is seeking a Senior Software Engineer to enhance the performance and reliability of their core services. The role involves deep systems analysis and distributed tracing to resolve performance bottlenecks in their distributed architecture.
AppsArtificial Intelligence (AI)BlockchainFinTechMobile PaymentsNatural Language ProcessingPayments
Responsibilities
Performance Optimization: Proactively identify, diagnose, and resolve performance bottlenecks within our complex distributed systems, focusing on latency, throughput, and resource utilization (CPU, memory, I/O)
Distributed Tracing Implementation: Design, implement, and maintain advanced distributed tracing solutions (e.g., using OpenTelemetry, New Relic, Cloud Trace) to gain end-to-end visibility into service interactions and request lifecycles
System Profiling & Analysis: Utilize state-of-the-art profiling tools (e.g., Flame Graphs, eBPF, DTrace, Cloud Profiler or commercial APMs) to perform deep dives into application and kernel-level performance
Benchmarking and Load Testing: Develop and execute comprehensive performance and load tests to validate system changes and predict behavior under high traffic
Tooling Development: Build and enhance internal tools and dashboards for real-time monitoring, performance data analysis, and anomaly detection
Collaboration and Mentorship: Work closely with development teams to promote best practices in writing high-performance, efficient code and system design
Capacity Planning: Provide performance data and analysis to inform capacity planning and infrastructure scaling decisions
Qualification
Required
5+ years of experience in software development, with a significant focus on systems performance and reliability engineering
Strong proficiency in at least one systems-level programming language (e.g., Go, C++, Java, or Rust)
Deep understanding of distributed systems concepts, including microservices architecture, inter-process communication, concurrency, and fault tolerance
Hands-on expertise with at least one distributed tracing system and strong knowledge of logging and metrics platforms (e.g., Prometheus, Grafana, ELK stack)
Solid understanding of Linux/UNIX operating systems internals, including kernel scheduling, memory management, and networking stack
Excellent grasp of data structures and algorithms, and their impact on code performance
Deep experience with the GCP ecosystem, GKE, Cloud Pub/Sub throughput tuning, and Cloud Load Balancing, Cloud Profiler and other solutions
These are the applicable requisites, although equivalent competencies in any of the above will also be considered
Preferred
Experience contributing to or managing large-scale, high-traffic production environments
Familiarity with cloud-native technologies (e.g., Kubernetes, Docker) and associated performance challenges
Experience with eBPF for advanced system observability and troubleshooting
Experience in optimizing database performance (SQL/NoSQL)
Benefits
Initial stock options grant
Annual performance bonus
Health, dental, and vision plans
Remote work environment, although we have offices in Miami and México City and would love to work in hybrid model if you are up to it.
Continuous learning opportunities
Unlimited PTO
Paid parental leave
Empowering opportunities for growth in a dynamic entrepreneurial environment
Company
Félix
Félix is a chat-based platform that enables Latinos in the US to send money abroad.
51-200 employees
H1B Sponsorship
Félix has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (6)
2024 (13)
Funding
Current Stage
Growth StageTotal Funding
$99.53MKey Investors
QED InvestorsCastle Island VenturesSwitch Ventures
2025-04-03Series B· $75M
2024-05-28Series A· $5.4M
2024-01-22Series A· $11.17M
Leadership Team
Manuel J Godoy
Co-Founder & CEO
Bernardo Garcia
Co-Founder
Recent News
2025-11-19
2025-11-19
Company data provided by crunchbase