Senior SRE / DevOps Engineer, Kubernetes, A2P Messaging

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🔥 0 minutes ago

🇵🇱 Poland – Remote

💵 zł150 - zł190 / hour

⏰ Full Time

🟠 Senior

⛑ DevOps & Site Reliability Engineer (SRE)

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Digital New Agency

WebsiteLinkedInAll Job Openings

51 - 200 employees

💼 Consulting

📦 Logistics

📣 Marketing

Consulting • Logistics • Marketing

Digital New Agency (DNA) supports clients in the areas of new technologies and marketing. The expertise of DNA stretches from building engineering teams that build digital products to creating and executing sales-driven media strategies. DNA offices are located in Stockholm, Sweden and Łódź, Poland.

📋 Description

• Use AI-assisted engineering for infrastructure tooling, automation, documentation and runbooks • Build and operate Kubernetes infrastructure across two sites using infrastructure-as-code and automated delivery • Design deployment mechanisms that gracefully drain long-lived connections during releases • Own platform networking, including stable ingress and egress IPs, Layer 4 load balancing, TLS and external-provider connectivity • Build and operate observability with metrics, logs, dashboards and alerting • Design monitoring around production behaviour, individual connections and failure modes • Own certificate lifecycle, secrets management and platform access control • Operate highly available PostgreSQL, including replication, failover, backups and verified restores • Design and exercise backup and disaster-recovery procedures across two sites • Collaborate with engineers and QA on performance and production-scale load testing • Support migration and production cutovers • Participate in production incident response and a 24×7 on-call rotation during steady-state operation • Build and operate a high-volume A2P messaging platform processing approximately 1 million messages daily for around 175 customers and 120 suppliers, with more than 300 long-lived messaging connections • Follow the platform through production readiness, migration, hypercare and steady-state operation

🎯 Requirements

• Experience with telecom, carrier, messaging or other environments built around persistent network connections • Knowledge of SMPP, SIP, SS7 or similar telecom protocols • Strong production experience operating Kubernetes on self-managed, on-premise or similarly infrastructure-heavy environments • Experience with stateful, long-lived TCP workloads on Kubernetes, including connection draining, stable ingress/egress, Layer 4 load balancing and deployment behaviour • Strong Linux and networking fundamentals • Ability to diagnose routing, NAT, firewalls, MTU, TLS and packet-level behaviour • Practical troubleshooting experience with tcpdump and production network diagnostics • Experience designing monitoring and alerting • Strong infrastructure-as-code and CI/CD experience for containerised systems • Practical PostgreSQL operations experience, including replication, failover, backup and verified restore • Ability to work directly with engineers from external infrastructure and network providers • Professional English • Real production on-call and incident-response experience • Experience configuring or troubleshooting IPsec connectivity with external parties • Experience designing or operating multi-site active-active or active-passive environments • Hands-on disaster-recovery exercise experience • Performance engineering experience, including Linux kernel or network tuning for high connection counts • Security hardening experience, including CIS-style benchmarks, vulnerability management or software supply-chain practices • Experience being the first SRE or Platform Engineer on a system

🏖️ Benefits

• Fully remote work in Poland or work from the Łódź office • Autonomy and responsibility • Diversity and psychological safety at work • Agile and DevOps working environment • Greenfield infrastructure with influence over architecture and operational practices • Small senior team with short decision paths • Direct collaboration with engineers and the solution architect • AI-assisted tooling where it improves engineering and operational work