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Offer summary
(Summary generated by AI based on the full job description)
The project involves mission-critical SaaS and telecommunications infrastructure focusing on Linux (CentOS, Ubuntu, Debian), virtualization (KVM, Proxmox, OpenVZ, K3s), and VoIP technologies (SIP, Kamailio, FreeSWITCH). Responsibilities include maintenance, scaling, and automation of production infrastructure, optimizing VoIP platforms, managing networks, and troubleshooting. The salary ranges from 20,000 to 25,000 PLN. Benefits include private healthcare, training support, sports cost sharing, and remote work.
from: 9 July 2026
to: 23 August 2026
20 000 - 25 000 złnet (+ VAT)/ mth.B2B contract (full-time)
20 000 - 25 000 złgross/ mth.contract of employment
Offer parameters
level:senior
working mode:hybrid
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
Nginx
PostgreSQL
RabbitMQ
Redis
Consul
Elasticsearch/OpenSearch
Operating system
Windows
macOS
Linux
Employer requirements
- Strong experience administering Linux environments (CentOS, Ubuntu, Debian).
- Hands-on knowledge of virtualization technologies (KVM) and container platforms, including Proxmox, OpenVZ, or K3s.
- Experience with Nginx, PostgreSQL, RabbitMQ, Redis, Consul, Elasticsearch/OpenSearch, and similar production technologies.
- Practical knowledge of monitoring and logging solutions such as Zabbix and Graylog.
- Experience supporting VoIP environments, including SIP, Kamailio, FreeSWITCH, SBCs, AudioCodes, or FreePBX.
- Solid networking knowledge, including BGP, OSPF, VPNs, firewalls, QoS, and platforms such as VyOS, Juniper, or MikroTik.
- Strong troubleshooting and problem-solving skills in production environments.
- Experience with Microsoft technologies, cloud platforms (Azure or GCP), Hyper-V, WebRTC, or 3CX will be considered an advantage.
Your responsibilities
- Administer, maintain, and develop Linux-based production infrastructure.
- Ensure high availability, scalability, and performance of mission-critical systems.
- Manage virtualization, containerization, and infrastructure automation.
- Maintain monitoring, logging, and alerting platforms.
- Support and optimize VoIP and telecommunications platforms.
- Design and maintain network infrastructure, including routing, VPNs, and firewalls.
- Troubleshoot complex production incidents and implement long-term improvements.
- Collaborate with engineering teams on infrastructure modernization and architecture initiatives.
About the project
We are looking for an experienced Senior Telco Infrastructure Administrator to join a team responsible for maintaining and developing mission-critical SaaS and telecommunications infrastructure. In this role, you will manage highly available production environments, optimize system performance, automate operational processes, and support modern VoIP platforms. You will work across Linux infrastructure, networking, virtualization, and cloud technologies while contributing to the evolution of scalable and resilient platforms. This is an excellent opportunity for engineers who enjoy solving complex infrastructure challenges and influencing technology decisions.
Dlaczego uważamy się za nieszablonową agencję? Oto kilka powodów:
- dotLinkers jest odzwierciedleniem naszego podejścia do rekrutacji oraz miejscem, gdzie swobodnie możemy wdrażać nasze, w przyszłości także Twoje (czasem szalone) pomysły.
- Pracujemy głównie ze start-upami i firmami produktowymi, które piszą w oparciu o najnowszy stack technologiczny. Dzięki temu, nasze oferty przyciągają spore zainteresowanie programistów, którzy chętnie z nami współpracują. Dla osób celujących w jedne z największych firm, również coś u nas znajdą 😉 Cechuje nas też bardzo indywidualne podejście do Kandydatów.
- Przy rozmowie z Kandydatami przekazujemy im bardzo rzetelne i pełne informacje o stanowiskach, które proponujemy. Gdy omawiamy te stanowiska z Hiring Managerami, zadajemy im średnio 70 pytań technicznych!
What employer offers
- Employment based on an employment contract or B2B agreement.
- Competitive salary of 20,000–25,000 PLN/month (depending on experience and employment type).
- Opportunity to work with advanced SaaS and telecommunications infrastructure.
- Real impact on infrastructure architecture and technology decisions.
- Flexible hybrid working model after onboarding.
- Stable, long-term cooperation in a highly skilled engineering team.
- Professional development opportunities and exposure to modern cloud, networking, and VoIP technologies.
Benefits
- sharing the costs of sports activities
- private medical care
- sharing the costs of professional training & courses
- life insurance
- remote work opportunities
- sharing the costs of tourist services
Recruitment for
Our client specializes in delivering and developing advanced Contact Center solutions for large organizations. They support businesses in optimizing customer service processes through modern, multi-channel communication systems. The company integrates technologies such as voice, chat, email, and social media into unified platforms. They also focus on continuous improvement of implemented solutions, leveraging data analysis and emerging technologies like AI. Their approach combines consulting, implementation, and long-term client partnership.
About our client
Our client is a technology company specializing in delivering modern Customer Experience, Contact Center, and CRM solutions for medium-sized and enterprise organizations. The company supports clients in digital transformation by designing and implementing omnichannel communication platforms, AI-powered automation, and advanced system integrations. Its portfolio includes projects built on leading cloud and customer engagement technologies, helping businesses optimize customer service processes and improve operational efficiency. The organization combines deep technical expertise with a strong business focus, delivering scalable and secure solutions tailored to clients’ needs.
dotLinkers Sp. z o.o.
Jesteśmy dotLinkers, pierwszą agencją rekrutacyjną IT dedykowaną start-upom oraz firmom produktowym. Aby być elastycznym, w naszym portfolio znajdzie się również kilka propozycji do jednych z największych graczy na rynku. À propos graczy, śmiało możemy się takowymi nazywać. Lubimy grać i współzawodniczyć tak na boisku jak i na rynku rekrutacyjnym. Po pracy chillujemy grając w petanque, piłakrzyki, siatkówkę, kosza i bilboquet. Dzięki najlepszemu zespołowi z roku na rok osiągamy niesamowite wyniki, co jest najlepszym wskaźnikiem zadowolenia naszych klientów.
Gallery
Senior Telco Infrastructure Administrator
20k–25k zł / mth. (CoE), 20k–25k zł / mth. (B2B)
I apply to:
dotLinkers Sp. z o.o.
Warszawa, Masovian
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