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High-Performance Systems Engineer

2 tygodni temu


Gdańsk, Polska dotLinkers Pełny etat

Welcome to dotLinkers, a product company that revolutionizes employee communication and monitoring in large corporations. Our innovative platform is available in both web and mobile versions, seamlessly integrating with internal systems, customer databases, and other messengers.

As a Senior Performance Engineer at dotLinkers, you will be part of an amazing DevOps team working with modern cloud-native infrastructure and cutting-edge tooling. If you thrive on making a tangible impact, are eager to explore new technologies, and enjoy collaborating with diverse teams, this role is perfect for you.

Key Responsibilities:

  • Database Optimization: Identify and improve query hotspots, refine schema structures, and fine-tune underlying systems to boost database performance and scalability.
  • API Performance Enhancement: Reduce end-to-end request latency and increase throughput by applying techniques like worker pool tuning, connection pooling, caching, and leveraging tools like ProxySQL.
  • Code Analysis: Analyze, read, and modify code across various services to identify and resolve performance bottlenecks.
  • Performance Monitoring: Design and maintain dashboards providing actionable insights into system performance.
  • Collaborative Problem-Solving: Partner with engineering teams to investigate and resolve platform-wide performance issues.
  • Mentorship: Share expertise with the engineering team, teaching best practices for database performance, profiling, and scalable system design.

Requirements:

  • Collaborative Mindset: A team player willing to collaborate across engineering teams.
  • Proven Expertise: 5+ years of experience in engineering with a strong focus on performance and system optimization.
  • Database Mastery: Deep understanding of database internals and optimization techniques, particularly for MySQL and PostgreSQL.
  • Linux and Networking Expertise: Strong knowledge of Linux systems and networking (e.g., TCP/IP, load balancing, DNS), with the ability to troubleshoot complex issues.
  • Code Fluency: Solid ability to read and modify code in languages such as Python, Java, or other backend-oriented programming languages.
  • Kubernetes Experience: Practical experience with Kubernetes, including understanding its impact on performance and scalability.
  • Microservices Observability Expertise: Practical experience with tracing tools and optimizing microservices architectures.
  • Performance Profiling Mastery: Hands-on experience with tools like eBPF, flame graphs, and other profiling techniques inspired by Brendan Gregg's methodologies.
  • Cloud Platforms: Familiarity with cloud services (AWS, GCP) and their database offerings (e.g., RDS, managed PostgreSQL/ClickHouse).

Nice to Have:

  • Global Network Optimization: Experience optimizing global network performance using cloud tooling to leverage edge caching, early TLS termination, HTTP protocol optimization (e.g. HTTP/2/3 or QUIC), etc.
  • Infrastructure-as-Code Expertise: Familiarity with tools like Terraform for automating and managing infrastructure deployments.
  • Open Source Contributions: Contributions to open-source projects, especially in the database, performance, or observability domains.

The Offer:

  • Competitive Salary
  • Phone & Home Internet Costs Reimbursement up to 80 PLN/month
  • Private Health Care Package with Luxmed
  • Multisport Benefit Card
  • Creative Allowance – paid as 1000 PLN gross/month
  • Home Office Set-up Reimbursement of up to 1000 PLN
  • Personal Learning & Development Budget of 1500 USD/year
  • Sabbatical Program – 1 month paid leave at 3, 5, 10 year tenure
  • 26 days of Annual Leave/year
  • 2 Mental Health Days off per year
  • Laptop for work purposes
  • Hybrid Working Model
  • Stock Options