Lead Systems Engineer (Platform Systems)

RTB House

Location: [Poland]    We Are:  RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel.  Our Platform Engineering team, within the Bidding Platform structure, is looking for engineers with a strong interest in system-related topics (deployment, monitoring, databases, load balancing), as well as experience in leading the specification and development of complex projects and coordinating the work of others. If you want to work on technically challenging and sophisticated solutions, this is the opportunity for you! You Will:  * Plan and then hands-on lead further development within a given technical area like deployment, monitoring, databases or load balancing, in the context of existing infrastructure within RTB House; * Coordinate the work of a project team of 3-4 people, also making arrangements with other teams and units within RTB House; * Ensure the reliability and scalability of the solutions built. Desired Experience:  * Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms; * Ability to proactively define requirements, ask appropriate questions and draw conclusions that will combine technical constraints and business needs; * Ability to lead the design and implementation of a solution; * Experience in leading project teams; * Willingness to be involved in topics that go beyond programming and design, such as responsibility for technical areas or communication with other teams; * Proactive attitude, independence in taking action; * Extensive experience in programming and readiness to implement key system elements as well as involvement in code reviews; * Good knowledge of methods of creating concurrent programs and distributed systems; * Ability to critically analyze created solutions in terms of performance (from estimating the theoretical performance of designed systems to detecting and removing actual performance problems in production); * C1 level in English and Polish. Selected technologies used: * Java, Python * Kubernetes, Prometheus * Aerospike, Memcached * Google Cloud Platform, BigQuery, MinIO * Kafka, Clickhouse * PostgreSQL * Elasticsearch * Jenkins, Graphite We Offer: * Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard. * Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). * Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects. * Cooperation based on B2B contract. * You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.

Wireless Logic

WHAT WE’RE ALL ABOUT: Any company can tell you about how they are a multi award winning, market leading business and yes, we are both of those things in the world of IoT connectivity!  But we’re more than that. 🌍✨ Our mission? To make IoT management a breeze for any device, anywhere. With over 10 million IoT subscriptions active in 165 countries and direct partnerships with 50 mobile networks, we connect you to more than 750 networks worldwide, delivering unmatched value across the IoT connectivity chain. Innovation is in our DNA, and we have an insatiable hunger to ‘wow’! 🚀 While we may not always get it right, our drive to collaborate, innovate, and achieve top-notch customer satisfaction never wavers. We offer industry expertise, stellar service support, and the most flexible, resilient, and secure connectivity solutions on the market. Our expertise spans across various sectors, including industry, agriculture, healthcare, security, transport, utilities, and smart cities. IOT… A FANCY ACRONYM OR A SECRET CODE? The Internet of Things (IoT) is like the magical glue that keeps the world connected! 🌐✨ From ordering your favourite takeaway to the ANPR technology that helps you find a parking spot, IoT is everywhere—even if you don’t realize it. At Wireless Logic, we provide cutting-edge connectivity solutions and technologies to ensure a vast array of devices stay seamlessly connected. The role  The company is seeking an experienced Lead Systems Engineer with extensive security and disaster recovery experience to provide technical leadership ensuring that Operating Companies (OpCos) implement and maintain effective security controls, disaster recovery (DR), and business continuity measures in line with Group policies.   In addition to hands-on engineering responsibilities, this role includes team leadership and capability development, ensuring that local and central engineering teams are effectively guided, supported and aligned with Group strategy. This hands-on role will leverage strong systems engineering expertise to support local IT teams in defining, implementing, and rigorously testing Disaster Recovery plans, as well as enhancing defences against ransomware and other cyber threats.  Key relationships  Systems Engineers will work closely with the Group Infrastructure team, as well as local IT and operations teams in each operating company.   They will collaborate with the CISO and wider security operations function to align infrastructure controls with group security strategy, provide technical guidance to application owners and platform specialists. Responsibilities include:  * Security Engineering & Compliance * Oversee and coordinate security engineering activities across teams, ensuring consistent standards and effective delivery. * Guide OpCos in the deployment, configuration, and optimisation of security tools (e.g. Entra, MFA, SSO, Endpoint protection, Network segmentation, PAM, SIEM, Backup and recovery solutions). * Review local and cloud implementations to ensure technical alignment with Group security standards, toolsets, monitoring and reporting requirements. 4Assist in incident response activities, particularly ransomware scenarios, ensuring containment and recovery are technically robust.  * Disaster Recovery & Business Continuity * Partner with local IT teams to design and document DR plans for critical business systems. Across a wide range of cloud and on-premises infrastructure, including Windows, Linux, Containerised and Cloud native environments. * Lead technical DR testing exercises, including Tabletop, system failover, systems and data recovery, and backup validation.  * Analyse test outcomes, identify gaps, and provide practical remediation guidance. * Ensure recovery time objectives (RTOs) and recovery point objectives (RPOs) are understood, realistic and met. * Coordinate cross-team DR readiness efforts and ensure accountability for remediation actions. * Technical Support & Collaboration * Act as a technical mentor to local IT teams, providing engineering-level guidance on system hardening, patch management, and resilience strategies. * Provide day-to-day leadership to engineers, including task prioritisation, workload management and technical oversight. * Conduct knowledge sharing sessions and promote best practices across teams. * Develop standardised runbooks and technical playbooks for ransomware prevention, response, and recovery.  * Continuous Improvement * Work with the CISO and Security team to track emerging security threats and recommend technical improvements to security and resilience tooling. * Support the integration of cloud-based and on-premises systems into DR strategies. * Provide input into Group-wide security awareness initiatives, ensuring technical accuracy.  Expertise Required  * Strong background as a Systems Engineer / Infrastructure Engineer with significant exposure to IT Security and resilience.  * Demonstrated experience leading or mentoring systems engineering teams in a technical environment * Proven track record in designing and testing Disaster Recovery solutions across multiple technology stacks.  * Familiarity with backup solutions, replication technologies, and high-availability architectures.  * Knowledge of cybersecurity frameworks (ISO 27001, NIST, CIS Controls) and security tooling (EDR, SIEM, vulnerability management).  * Excellent troubleshooting and problem-solving skills in complex environments.  * Strong interpersonal skills, able to engage effectively with global teams.  * Proven experience with zero trust security models in hybrid environments, least privilege enforcement, Privileged Access Management (PAM),   * Strong knowledge of networking (routing, firewalls, segmentation, VPN, DNS, load balancers).  * Practical expertise in AWS and/or Azure platforms, IAM, and cloud security controls.  * Administration and hardening of VMware vSphere infrastructure.  * Hands-on experience with Kubernetes.  * Proficiency with Windows Server and Linux.  * Advanced scripting and automation skills (PowerShell, Python, Bash, Terraform, Ansible).  * Experience managing M365/Entra ID, SSO, MFA, and conditional access.  * Experience with vulnerability management using tools such as Tenable.io.  * Experience working in multi-national environments with diverse technical standards.  * Knowledge of telecoms or IoT-related infrastructure.  Behaviours  Successful candidates will demonstrate a hands-on, problem-solving mindset, with a strong focus on delivering secure and resilient systems. They will be collaborative team players, able to work effectively with colleagues across geographies and technical disciplines. A proactive approach to automation, standardisation, and continuous improvement is essential, along with a willingness to challenge legacy practices and adopt modern, secure alternatives. Above all, they will act with integrity and accountability, ensuring that security and resilience remain at the forefront of their work.  Why work with us?  * The opportunity to work for an entrepreneurial Company    * Full training, ongoing support, and the tools you need to grow and develop in your role   * We are a company with a heart and who genuinely values and respects its employees * A key role in delivering and strengthening resilience across a global organisation.  * Opportunities to drive critical disaster recovery and security initiatives across multiple regions.  * Exposure to complex hybrid cloud and telecoms infrastructure Who are we?  A new thing, device or asset is connected to Wireless Logic’s cellular platform every 18 seconds of every day. And today, Wireless Logic Group has over 6 million IoT SIM subscriptions active in 165 countries, with collaborative partnerships that provide reach into more than 750 global networks.   The group is entirely customer and market-driven, meeting customers where they are to help them innovate by providing expert service and the most flexible, resilient, and secure connectivity solutions in the market.   Wireless Logic’s purpose-built IoT connectivity platforms connect (globally and locally) across multiple mobile networks and technologies to give customers a single management window for their assets. It provides the ultimate connectivity, control, and security.   Wireless Logic Group is backed by Montagu Private Equity, one of the world’s leading private equity-backed investors, giving Wireless Logic Group unrivalled financial strength.  Where do I apply?  If this sounds like a role you are interested in please submit your application directly through our website including your CV.  Wireless Logic LTD are an equal opportunities employer and positively encourages applications from suitably qualified and eligible candidates regardless of sex, race, disability, age, sexual orientation, transgender status, religion or belief, marital status, or pregnancy and maternity.  We know the world has changed, and we want to offer our employees the chance to collaborate at our unique office spaces, whilst enjoying the convenience of working from home. We've adopted a hybrid working approach to give more flexibility on where and how we work. You'll find out more about what this means for this role during the recruitment process, but we are currently excited to have our employees experience our office culture as much as possible.   Wireless Logic Group unites and brings people together. We accomplish this when we lead with a lens of diversity, equity, and inclusion in everything we do. As a global company that drives culture we aim to reflect the world’s diverse voices both internally and externally to ensure success in our mission.   By applying for this role, you are consenting for us to hold and process your data in compliance with the General Data Protection Regulations. If you have any questions or wish to exercise your right to access, erase or restrict the holding or processing of your data please contact us (recruitment@wirelesslogic.com) and we will respond to your query as soon as possible.

Sumup

About the role SumUp is looking for a Systems Engineer Manager to join our Corporate IT team. In this role, you will report to the Head of Global IT. You will establish and lead our Systems Engineering function within Corporate IT, establishing the discipline from the ground up. You will own and mature SumUp's identity infrastructure, built on Microsoft Entra ID, and drive the consolidation and standardization of our core business platform configurations. We are looking for a technical strategic thinker who thrives in bringing structure to complexity. You won’t just be "keeping the lights on"; you will be actively improving stability, observability, and performance. About the team The Corporate IT team currently consists of a diverse group of System Administrators and outsourced support across the EU and the Americas. Our mission is to ensure every SumUp employee can access the tools they need safely and efficiently. We provide the "digital keys" to the company, ensuring that identity and access are seamless enablers of work rather than hurdles.  We believe in high accountability, technical excellence, and fostering a culture where IT is treated as an engineering discipline. If you are excited about building unified identity platforms, leveraging cutting edge technologies like AI and scaling internal engineering in a complex, multi-region fintech environment, we want to hear from you. What you’ll do * Design conditional access policies, manage identity lifecycles, and ensure SSO health across a complex Microsoft Entra ID environment. * Develop scripting and workflow tooling to reduce manual toil and increase reliability across the organization. * Drive the adoption of AI-powered tooling to automate routine processes and scale the team's output beyond human hours. * Partner with Endpoint Management to ensure seamless integration between identity, access, and device management across the fleet. * Govern access to AI platforms and tooling (e.g. Copilot, Cursor, Langdock) - permissions, data boundaries, audit trails * Lead the consolidation and standardization of core business platform configurations to bring consistency to our fast-growing landscape. * Build a team where you will set clear expectations and actively support the career growth of your team members. * Partner closely with Security & Compliance for access controls, the People Team for "Joiner-Mover-Leaver" processes, and Engineering teams for secure tool access. * Own the IT service queue for systems-level issues, triaging and resolving with engineering rigour rather than a purely reactive support mindset. You'll be great for this position if: * You have 5+ years of experience in IAM or Systems Engineering, with deep expertise in tooling like Azure/Entra ID, Okta, or OneLogin. * Familiarity with governing non-human identities and service accounts at scale -- this is increasingly critical as AI tooling proliferates and is a meaningful filter for the right candidate * You have a proven track record of automating lifecycle processes (JML) and proficiency in scripting (PowerShell, Bash, or Python). * You design systems that solve access problems before they reach the helpdesk and have expert knowledge of cloud-first identity principles like SCIM and OIDC. * You have experience acting as a technical lead, managing high-level administrative permissions, and navigating "Least Privilege" environments. * You see technical debt and inconsistent configurations as an opportunity to create structure rather than a hurdle to avoid. Why you should join SumUp: 🌍 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup. 🌈 Commitment to Diversity and Inclusion: Be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced 📚 A dedicated annual L&D budget of €2,000 for attending conferences and/or advancing your career through further education. 🚀 Enrolment onto our VSOP program: You will own a stake in SumUp’s future success 💶 A corporate pension scheme where we match up to 20% of your contributions 🔄 30 Days Sabbatical: Enjoy the unique opportunity to take a well-deserved break with our 30 days sabbatical benefit after completing 3 years of employment with SumUp. 🔗 Referral Bonus: Earn additional rewards by referring talented individuals to join the SumUp team. 🚵🏾‍♂️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches. About us: Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 36 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.  SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Explore career opportunities with us and join a team driven by collaboration, innovation, and a shared vision of creating a world where everyone can build a thriving business. Discover more about our vibrant and inclusive work culture and how we work on our careers website, and follow our journey on LinkedIn and Instagram. Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.