Senior Site Reliability Engineer

Senior Site Reliability Engineer

As a Senior Site Reliability Engineer, you’ll be at the heart of our most critical operations, building the fault-tolerant systems that serve our most important clients : Communications Service Providers (CSP).

We build, test, launch, and operate the complex, high-stakes systems for our global telco customers. Your mission is to ensure the reliability, efficiency, and performance of our core products (like UMP, CEM, BSAP, and DHCP) across both our cloud and complex on-premise deployments.

This is no small task. Our products handle hundreds of millions of devices in 100+ large deployments worldwide by industry giants like T-Mobile, Play and Vodafone, also via our Cloud offering.

As we embrace more cloud-native and Kubernetes-based deployments, we're facing new architectural challenges. We aren't just looking for someone to maintain systems; we are looking for an experienced engineer who loves to solve complex operational problems and is passionate about building the automation that will lead us forward.

Requirements

5+ years of professional experience in Site Reliability Engineering, DevOps, or a related role such as Systems or Software Engineering.

Advanced proficiency in a high-level language such as Python or Go, with the ability to design and build complex, maintainable automation services and frameworks.

Deep expertise with cloud infrastructure (e.g., GCP, AWS, or Azure) and container orchestration (Kubernetes).

Proven experience with Infrastructure as Code and configuration management (e.g., Terraform, Ansible).

Expert-level understanding of networking (TCP / IP, OSI) and Unix / Linux systems (Ubuntu, RHEL).

Expertise in designing, implementing, and managing monitoring and observability tools (e.g., Prometheus, Grafana, Zabbix).

A strong sense of ownership, and the ability to lead technical discussions and mentor other engineers.

Proficiency in English (B2+).

A huge plus if you have experience with :

A formal SRE role in a previous company.

Database setup and administration (e.g., MongoDB, Redis).

Performance tuning and debugging of JVM-based applications.

Building and scaling distributed systems.

Log management stacks (e.g., ELK, Loki).

Responsibilities

Design, build, and maintain complex, maintainable automation services and frameworks to eliminate toil and scale our operations.

Proactively identify, debug, and resolve complex performance and reliability issues within our core product codebases.

Communicate directly with technical customer teams to troubleshoot, manage, and resolve complex production issues.

Lead blameless postmortems and Root Cause Analyses (RCAs) for complex incidents, driving preventative measures.

Establish and monitor Service Level Indicators (SLIs) to align the team with availability and latency objectives.

Participate in an additionally paid 24 / 7 on-call rotation, responding to and resolving critical system issues.

Mentor junior and mid-level engineers through code reviews, design discussions, and pair programming.

Collaborate with development teams on feature design and architecture to ensure reliability, scalability, and operability from the start.

Set up and configure software, networks, and operating systems across bare metal, VMs, and cloud / Kubernetes infrastructure.

Drive improvements to our monitoring and observability stack (Prometheus, Grafana, Loki) to provide a comprehensive view of system health.

What we offer

Freedom and responsibility. Our goal is to inspire people more than manage them. We want our teams to do what is best for our products. This, in turn, generates a sense of responsibility which drives us to do great work.

Technical challenges : our customers rely on the reliability of our products to generate revenue in their business. The telco industry is ever-growing and needs us to support that growth.

Open-source contribution opportunities.

A team of highly skilled and humorous colleagues.

Access to the best tools and equipment available in the market.

A MacBook Pro / ThinkPad with 2 monitors.

Company events and team building activities.

Multiple career paths and employee development options – we want you to develop into a tech lead in the future, but we’ll support you in getting another dream role in site reliability, management, product development or sales.

Flexible working hours / remote work when you need it

Trainings and conferences

Multisport card

Kitchen full of snacks and treats (including Good Lood ice cream)

Car parking area and bike room

A relaxed work atmosphere – no dress code, no open space