Site Reliability Engineer

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    "description": "<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Come join oneZero Financial Systems! An exciting, fast-growing company with Headquarters in Somerville MA, oneZero empowers banks, brokerages and hedge funds with cutting edge trade routing and execution technology. Our platform, deployed with 200+ entities globally, features a low-latency trading environment, integrations to the world’s leading execution venues, and reliable IT infrastructure and technical support—all designed to be customized and scaled to serve any business model and any size of market participant. We take pride in our great work atmosphere and highly motivated team of engineers. We are currently looking for a motivated and talented Site Reliability Engineer to join our Johannesburg office. </span><br></p>\n<p><br><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">oneZero is proud to have been named one of Business Intelligence Group's Best Places to Work for four consecutive years:</span></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\"><a href=\"https://www.onezero.com/awards/onezero-earns-recognition-as-a-2025-best-place-to-work/\" target=\"_blank\" rel=\"noopener noreferrer\">https://www.onezero.com/awards/onezero-earns-recognition-as-a-2025-best-place-to-work/</a></span></p>\n<p><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">The Boston Globe names oneZero a Top Place to Work in 2022, 2023, and 2024: <a href=\"https://www.onezero.com/homepage/the-boston-globe-names-onezero-a-top-place-to-work-for-third-year-in-a-row/\" target=\"_blank\" rel=\"noopener noreferrer\">https://www.onezero.com/homepage/the-boston-globe-names-onezero-a-top-place-to-work-for-third-year-in-a-row/</a></span></p>\n<p><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">oneZero earns 2024 Great Place To Work Australia Certification<br><a href=\"https://www.onezero.com/awards/onezero-2024-great-place-to-work-australia-certification/\" target=\"_blank\" rel=\"noopener noreferrer\">https://www.onezero.com/awards/onezero-2024-great-place-to-work-australia-certification/</a><br></span></p>\n<p><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\"> Please see oneZero featured in e-Forex Magazine to learn more about the company and our dynamic team (<a href=\"https://goo.gl/vbXw8i)\" target=\"_blank\" rel=\"noopener noreferrer\">https://goo.gl/vbXw8i)</a></span></p>\n<p><br><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 14pt; font-weight: bold\">Job Purpose</span></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">The Site Reliability Engineer is responsible for ensuring the high availability, reliability, and performance of oneZero's AWS-centric microservices platform supporting analytics and market-data products delivered to global brokers. This role is deeply technical, requiring strong AWS expertise and </span><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Python proficiency to automate operations, debug production services, optimize performance, and support continuous delivery in a 24x7 financial services environment where uptime is mission-critical. Reporting to the IT Operations Manager, this position demands independent technical decision-making and the ability to exercise sound judgment when responding to critical incidents. The SRE operates with significant autonomy in assessing system performance, diagnosing complex issues, and making critical determinations that impact service availability across a high-traffic, globally distributed infrastructure.</span></p>\n<p><br><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 14pt; font-weight: bold\">Responsibilities</span></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">AWS Infrastructure Monitoring and Incident Response</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Monitor and manage AWS services supporting production workloads (ECS/EKS, EC2, Lambda, API Gateway, SQS/SNS, RDS, ElastiCache, CloudFront)</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Respond to alerts from CloudWatch, Datadog, and custom monitoring scripts with urgency and precision</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Exercise independent judgment in assessing incident severity and determining appropriate response strategies</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Diagnose scaling, networking, and performance issues in distributed AWS systems</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Perform incident response, ensuring rapid recovery and minimal downtime</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Coordinate with development teams during critical incidents and outages, serving as the technical authority for infrastructure decisions</span></li>\n</ul>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">Python-Driven Troubleshooting and Automation</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Write Python scripts and tools to automate operational tasks, system checks, and data validation routines.</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Analyze Python microservice behavior by reading logs, debugging issues, and profiling performance</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Build or enhance internal CLI tools to improve support workflows</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Use Python to interrogate APIs, AWS resources (via boto3), and production data sources</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Independently assess automation opportunities and implement solutions to reduce manual workload</span></li>\n</ul>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">Production Systems and Data Flow Stability</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Maintain stability across charting engines, data ingestion pipelines, market-data feeds, scanning engines, and sentiment analysis services</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Investigate failures in REST APIs, WebSocket streams, and asynchronous workers</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Validate deployments and configurations for AWS-based microservices</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Ensure data completeness and accuracy across instruments, markets, and broker-specific configurations</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Make real-time decisions on system changes, maintenance windows, and emergency response procedures</span></li>\n</ul>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">Collaboration and Continuous Operations Improvement</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Work with DevOps engineers to refine CI/CD pipelines, infrastructure-as-code workflows, and AWS deployment patterns</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Collaborate with backend teams to improve microservice reliability and observability</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Provide feedback on Python code, error-handling logic, and operational robustness</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Contribute to post-incident root cause analyses and propose architectural or automation improvements</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Participate in an on-call rotation to provide round-the-clock infrastructure support</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Documentation and Runbook Management</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Maintain detailed operational documentation, AWS service runbooks, and troubleshooting guides</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Build automated checks and self-healing routines where feasible</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Drive SRE best practices across the team</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Document configurations, standards, and operational procedures that align with industry best practices</span></li>\n</ul>\n<p><br><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 14pt; font-weight: bold\">Required Skills &amp; Experience</span></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">Experience Requirements</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">2+ years in production support, SRE, or DevOps with a strong AWS and Python footprint</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Demonstrated ability to exercise independent judgment in high-pressure situations and make</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">critical decisions affecting system availability</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Strong Python scripting and debugging skills (must be able to analyze stack traces, write</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">scripts, automate workflows)</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Strong analytical mindset and exceptional problem-solving ability</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Calm, structured communication during incidents</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Ability to work cross-functionally with DevOps, developers, QA, and product staff</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Keen attention to detail and strong ownership of production systems</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Comfortable working in a high-availability, high-traffic environment</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Off-hours support and coverage as part of on-call rotation</span></li>\n</ul>\n<p><br><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">Technical Expertise</span><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">AWS Services:</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">ECS or EKS (service deployments, scaling behavior, debugging containers)</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">EC2, Lambda, API Gateway</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">SQS/SNS messaging patterns</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">RDS (PostgreSQL/MySQL), DynamoDB</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">S3 and CloudFront</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">IAM, KMS, networking (VPC, subnets, security groups)</span></li>\n</ul>\n<p><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Monitoring &amp; Observability:</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">CloudWatch, Datadog, Grafana, OpenSearch/Kibana</span></li>\n</ul>\n<p><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Infrastructure &amp; DevOps:</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Docker containerization</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Infrastructure-as-code (CloudFormation, Terraform)</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">CI/CD pipelines (CodePipeline, GitHub Actions, GitLab CI, or similar)</span></li>\n</ul>\n<p><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Development &amp; Data:</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">REST APIs, WebSocket protocols, asynchronous workers, distributed system behavior</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">SQL proficiency and performance investigation for relational databases</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">MongoDB with JavaScript proficiency</span></li>\n</ul>\n<p><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">Preferred Qualifications</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Bachelor's degree in Computer Science, Information Systems, Engineering, or equivalent</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">practical experience</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Experience in fintech, trading systems, or market-data streaming</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Python experience with data processing, concurrency (asyncio), or task queues (Celery/RQ)</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Exposure to Kinesis, Kafka, or other event-streaming platforms</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Familiarity with FastAPI-based microservices</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Experience with cost optimization and AWS Well-Architected practices</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Understanding of foreign exchange markets and trading platform requirements</span></li>\n</ul>\n<p><br></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">Success Profile</span></p>\n<p><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">The ideal candidate will demonstrate:</span></p>\n<ul>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Operational Excellence: Reduced production incidents and improved uptime through proactive monitoring and rapid incident response</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\"><span style=\"font-weight: bold\">Automation Focus: </span>Faster MTTD and MTTR through automation and AWS-driven improvements</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\"><span style=\"font-weight: bold\"><span style=\"font-weight: bold\">Technical Impact:</span> </span>Operational tooling and Python automation that significantly reduces manual workload</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt\"><span style=\"font-weight: bold\">Collaboration: </span>Positive feedback from internal teams and external broker partners</span></li>\n<li><span style=\"font-family: Inter, sans-serif; font-size: 12pt; font-weight: bold\">Ownership: </span><span style=\"font-family: Arial, sans-serif; font-size: 10pt\"><span style=\"font-family: Inter, sans-serif; font-size: 12pt\">Strong sense of accountability for production system health and relia</span>bility</span></li>\n</ul>",
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