Cyber Security Engineer with CTF and Reverse Engineering Expertise

Project OverviewJoin us at the Telco Hub in Madrid, where we are at the forefront of integrating IT and telecommunications. We are actively developing and expanding Telco as a Platform (TaaP) on our unique layered cloud infrastructure. Our teams collaborate across countries and functions, delivering state-of-the-art services to Europe's top operators.Our mis…

Project OverviewAt the Telco Hub in Madrid, we are at the forefront of integrating IT and telecommunications, developing and expanding Telco as a Platform (TaaP) utilizing our unique layered cloud infrastructure. Our teams are organized into cross-functional and cross-border squads, delivering avant-garde services to Europe's leading telecommunications operators.Our goal is to provide an unparalleled customer experience grounded in three foundational principles: Cloud-Based – Leveraging cutting-edge technologies for enhanced scalability and performance. Automated – Enhancing efficiency through AI, automation, and DevOps methodologies. Sustainable – Creating a future-ready, environmentally sound infrastructure.We're seeking exceptional engineering talent who are keen to advance both technically and professionally within a vibrant and collaborative setting. If you're passionate about influencing the future of telecommunications, join us!The Voice & Messaging (T-VM) unit within Deutsche Telekom Technik GmbH is entrusted with overseeing all voice and messaging platforms across Deutsche Telekom's fixed and mobile networks throughout their lifecycle. The platforms under T-VM are integral to a substantial portion of Telekom Deutschland's core operations, and our mission is to maintain critical factors of stability, quality, innovation, and efficiency. The ACS Squad (Announcement-, Control & Supportsystems) manages the complete lifecycle of essential IMS components within DT Technik.Job Responsibilities:Managing IMS-MRF (Media Resource Function) deployed on Kubernetes.Overseeing OneiDNS, a cloud-native DNS service for all IMS nodes in fixed and mobile networks, deployed on Kubernetes.Administering VoIP Support Systems, a VMware-based application landscape within the IMS fixed network provisioning chain.Operating as a DevOps team, taking full accountability from design and engineering through to deployment and operational management.Addressing the next significant challenge of developing a new AI Calling system, built on DT Technik’s CaaS Kubernetes platform, to facilitate real-time speech processing and translation within IMS call flows.We are looking for a motivated and technically proficient colleague to join our team and contribute to this exciting journey.

Join our pioneering team at the Telco Hub in Madrid, where we are at the forefront of integrating IT and telecommunications, leading the charge in crafting and expanding Telco as a Platform (TaaP) on our proprietary layered cloud infrastructure. Our dynamic cross-functional squads are dedicated to delivering innovative services to Europe's top operators.We are committed to providing the ultimate customer experience, grounded in three fundamental principles: Cloud-based – Utilizing the latest technologies to ensure scalability and performance. Automated – Enhancing efficiency through AI, automation, and DevOps practices. Sustainable – Developing a future-ready, eco-conscious infrastructure.If you are an ambitious engineer looking to elevate your skills in a vibrant and collaborative atmosphere, we invite you to help shape the future of telecommunications!Our workforce is crucial to building a reliable and secure infrastructure, the foundation for tomorrow's innovations. With us, you will have outstanding opportunities to thrive in the digital future from day one.Deutsche Telekom Technik GmbH, a subsidiary of Telekom Deutschland GmbH, manages the technical infrastructure nationwide with a team of approximately 19,000 professionals. We design, build, and operate the systems and facilities that support the technical infrastructure on behalf of Telekom Deutschland GmbH.The Tribe Voice & Messaging is responsible for designing, developing, planning, validating, and operating all voice and messaging platforms within the fixed and mobile networks of DT Technik, ensuring top-quality service for our cellular and landline customers.We are currently working on a program to migrate voice and messaging applications to the cloud, merging fixed and mobile systems into a unified solution. We want you on our team to tackle this exciting challenge!Key Responsibilities:The Squad NIMS Core / HSS-FE, within the Tribe Voice & Messaging, oversees the entire lifecycle of the DT Technik IMS HSS Frontend platforms. This includes enabling and maintaining connectivity between IMS nodes and backend subscriber databases. Our team operates with agile methodologies as a DevOps unit, focusing on the design, engineering, development, deployment, and operation of the HSS-FE in close collaboration with our system vendor. A key challenge ahead is to establish a new OneHSS platform leveraging DT Technik’s CaaS Kubernetes platform as part of our Cloud Booster Program.

Veeam, the world leader in data resilience, empowers businesses to access and control their data anytime and anywhere. Our comprehensive suite includes data backup, recovery, portability, security, and intelligence. Headquartered in Seattle, Veeam safeguards over 550,000 customers globally, ensuring their operations remain uninterrupted. Join our journey as we innovate, grow, and make significant contributions for some of the largest brands globally. The future of data resilience is bright—take bold steps with us.About the Role: With the recent acquisition of Securiti AI, a frontrunner in AI-driven data security posture management (DSPM), Veeam is on the lookout for a Senior Sales Engineer. In this pivotal role, you will provide technical leadership within our sales team, focusing on the Securiti AI portfolio. Collaborating with a Securiti Sales Specialist, you will support 3-5 Account Executives and Veeam Solution Engineers, acting as the technical authority.Your key responsibilities will involve guiding customers from initial needs assessment to tailored solution design, showcasing the value through hands-on demonstrations and proofs of concept. Success in this position hinges on your strong technical acumen and your ability to foster trust with clients.What You’ll Do: Serve as the primary technical resource for Securiti AI solutions throughout the sales process.Lead in-depth technical discussions and tailor security solutions to meet customer needs.Address client requirements in data discovery, posture management, and compliance.Design and deliver engaging product demonstrations and proofs of concept.Work alongside product, engineering, and customer success teams to ensure seamless transitions.What You’ll Bring: Extensive experience in pre-sales or sales engineering roles.Deep knowledge of data and cloud security.Exceptional communication skills for engaging both technical and business stakeholders.Over 10 years of technical sales experience in the security domain.More than 15 years in Software/SaaS/Enterprise technical sales.Practical experience with AWS, Azure, or GCP.Familiarity with data privacy/security standards such as GDPR, NIST 800-53, and ISO 27001.

Project OverviewJoin the innovative team at the Telco Hub in Madrid, where we are at the forefront of integrating IT and telecommunications, developing and expanding Telco as a Platform (TaaP) on our proprietary layered cloud infrastructure. Our cross-functional teams deliver state-of-the-art services for some of Europe’s leading operators.Our commitment is to enhance customer experiences through three pivotal principles: Cloud-based – Utilizing cutting-edge technologies for optimal scalability and performance. Automated – Enhancing efficiency via AI, automation, and DevOps methodologies. Sustainable – Fostering environmentally-friendly, future-ready infrastructure.We seek exceptional engineering talent who are eager to evolve both technically and professionally in a vibrant and collaborative setting. If you are driven by a passion for redefining the future of telecommunications, this is the opportunity for you!The Voice & Messaging (T-VM) unit within Deutsche Telekom Technik GmbH oversees all voice and messaging platforms across Deutsche Telekom Technik’s fixed and mobile networks throughout their lifecycle. The platforms managed by T-VM are integral to Telekom Deutschland's core business, focusing on stability, quality, innovation, and efficiency. The ACS Squad (Announcement-, Control & Support Systems) is tasked with the complete lifecycle management of critical IMS components within DT Technik.Role Responsibilities:• Management of IMS-MRF (Media Resource Function) deployed on Kubernetes.• Oversight of OneiDNS, a cloud-native DNS service for all IMS nodes in fixed and mobile networks, also deployed on Kubernetes.• Administration of VoIP Support Systems within the IMS fixed network provisioning chain, utilizing a VMware-based application landscape.• Operate as part of a DevOps team, taking full ownership of design, engineering, deployment, and operations.• Tackle the upcoming challenge of developing a new AI Calling framework on DT Technik’s CaaS Kubernetes platform, facilitating real-time speech processing and translation within IMS call flows.We invite a motivated and technically adept individual to join our team and contribute to this transformative journey.

Veeam, a leading force in data resilience, empowers businesses to manage their data effectively, anytime and anywhere. With a robust portfolio that includes data backup, recovery, portability, security, and intelligence, Veeam safeguards over 550,000 clients globally, ensuring their operations run smoothly. Join us on our journey of growth and innovation, making a tangible difference for some of the world’s largest brands. Embrace the future of data resilience with confidence.About the Role: In light of our recent acquisition of Securiti AI, a pioneer in AI-driven data security posture management (DSPM), we are on the lookout for skilled Sales Specialists to propel growth in this dynamic sector. You will concentrate solely on Securiti AI solutions, collaborating with Veeam account executives to penetrate existing client bases, secure new ventures, and cultivate current Securiti AI accounts. With a shared territory among multiple AEs, you will enjoy significant earning potential and the backing of a dedicated Securiti AI solution engineer for technical support. Leverage Veeam’s abundant go-to-market resources to guarantee customer triumph. What You Will Do: Engage with clients to understand their needs and present tailored Securiti AI solutions.Collaborate with account executives to maximize sales opportunities and enhance customer satisfaction.Manage relationships with existing clients to ensure ongoing success and satisfaction.Utilize technical resources to demonstrate product effectiveness and secure sales.

Role overview airapps is seeking a Security Engineer to join the team in Madrid. The position centers on protecting company systems and sensitive data from security threats and vulnerabilities. Working alongside colleagues from various departments, the Security Engineer will help design and implement safeguards to ensure information remains secure. What you will do Protect airapps systems and data from potential security breaches Work with teams across the company to develop and apply security controls Spot possible security threats and recommend ways to address them Contribute to efforts that preserve the integrity and confidentiality of company information Requirements Background or strong interest in cybersecurity Comfort working with people from different departments Drive to keep up with new and emerging security threats This role is located in Madrid.

Why Join dLocal?At dLocal, we empower leading global brands to facilitate payments across 40 countries in emerging markets. Our expertise helps businesses enhance conversion rates and simplifies their payment expansion journeys. Acting as both a payment processor and a merchant of record, we enable our clients to tap into the fastest-growing emerging markets.Joining our team means being part of a vibrant global family. With over 1500 colleagues from more than 30 nationalities, you’ll have the chance to develop an international career that impacts millions of lives daily. We are innovators, unafraid of challenges, and prioritize our customers. If this resonates with you, we believe you’ll excel in our collaborative environment.

Role overview Nexthink SA seeks a Senior Corporate Security Engineer based in Madrid. The main focus is to safeguard company systems and data by enhancing cybersecurity practices and defending sensitive information from threats. Key responsibilities Lead initiatives that strengthen the overall security posture of the organization Collaborate with teams throughout the business to identify and address vulnerabilities Implement security controls and protocols to protect systems and data Respond to security incidents and assist in coordinating their resolution Collaboration This role involves close cooperation with colleagues across various departments, ensuring that security considerations are integrated into all areas of company operations.

Why Join dLocal? At dLocal, we empower some of the world's largest companies to seamlessly collect payments in 40 emerging markets. Global brands trust us to enhance conversion rates and simplify payment processes, enabling them to tap into the world's fastest-growing economies. Joining our team means becoming part of a diverse global workforce of over 1000 individuals from more than 30 nationalities, where your contributions will have a significant impact on millions of lives every day. We are innovative builders, not just participants in the status quo, and if you share our customer-first mindset, you will undoubtedly flourish in our dynamic environment. About Us & The RoledLocal processes billions in payments across 40 emerging markets, driven by a fast and innovative infrastructure designed to prioritize security without hindering progress. Our security approach is streamlined and automation-focused, fostering a culture where security engineers act as builders rather than gatekeepers. The directive from our CISO is clear: advance the business safely. Your role will be pivotal in developing our defensive infrastructure, overseeing detection platforms and cloud security engineering that support our security teams.You will collaborate across various domains, including Cyber Detection & Response, Cloud Security, Application Security, IAM, and our internal Security Automation & AI team, as well as engineering teams like DevOps and SRE. This cross-functional responsibility is intentional; you won’t just be tuning tools but will actively connect posture signals to response workflows, translating security requirements into engineering tasks and enhancing overall security efficiency.If you thrive on automating manual processes and are excited about tackling complex infrastructure challenges from inception to completion, this role is tailored for you.

AECOM is seeking a Security Designer with a focus on Integrated Security Systems for its Madrid office. This position centers on designing and implementing security solutions that protect assets and support safety in a range of settings. Role overview Work closely with teams from different disciplines to develop security system designs tailored to client requirements. The role involves translating client needs and regulatory standards into practical, effective security measures. Key responsibilities Design integrated security systems that address a variety of risk scenarios Implement solutions that safeguard people, property, and information Coordinate with colleagues from other specialties to ensure cohesive project delivery Ensure all designs comply with relevant regulations and client specifications Requirements Expertise in security system design and implementation Experience working with multidisciplinary project teams Knowledge of regulatory standards for security systems

We are seeking a highly skilled Senior AI Operations Engineer to join our innovative team at dlocal. In this pivotal role, you will leverage your expertise in AI and machine learning to enhance our operational processes, ensuring efficiency and effectiveness across our systems. You will collaborate closely with cross-functional teams to implement AI-driven solutions that will optimize our services and improve our overall performance.

Role overview The Senior AI Engineer at zooplusse will design and develop advanced AI models to address business objectives and enhance customer solutions. Collaboration with colleagues from various departments is a key part of this role, supporting the delivery of impactful AI-driven projects. What you will do Develop and improve AI models for practical, real-world use cases Partner with cross-functional teams to implement AI solutions Take the lead on AI initiatives that shape business results and customer experiences Location This role is based in Madrid.

Ebury is dedicated to empowering ambitious businesses in their quest for global expansion, and we extend that same commitment to our employees. We foster an innovative and collaborative environment that encourages problem-solving and ensures that everyone feels valued, supported, and empowered to thrive.If you're a team player eager to reshape the way businesses function on a global scale, reach out to us! We're excited to discuss how Ebury can elevate your career and help you influence the future.Senior Cloud Infrastructure Security EngineerHybrid (4 days in office) in MadridEbury is making substantial investments in its cloud infrastructure security to uphold the trust and safety of our worldwide financial services. As a Senior Security Engineer specializing in Cloud Infrastructure, you will take charge of enhancing the security framework of our cloud environments across AWS and GCP, focusing on network security, perimeter defense, and attack surface management.This hands-on position demands extensive knowledge of cloud-native security controls, network architecture, and defensive security operations. You will design, implement, and sustain security infrastructure that proactively identifies and mitigates threats before they affect our business. Close collaboration with platform, infrastructure, and security operations teams will be essential to instill security best practices within our cloud foundations.Key ResponsibilitiesOwn cloud security posture and attack surface management: Maintain comprehensive visibility and control across AWS and GCP environments. Implement cloud-native security monitoring, detection, and alerting to proactively identify and mitigate threats before they impact customers or the business. Define and enforce security baselines using policy-as-code.Design and maintain web application firewall infrastructure: Manage WAF configurations across AWS and GCP, developing and tuning detection rules in line with application threat models and emerging attack patterns. Establish operational processes for rule lifecycle management and incident response integration, collaborating with application teams to implement protections without compromising availability.Architect network segmentation and isolation: Develop and execute network security strategies ensuring proper separation between development, staging, and production environments. Define consistent patterns across multi-cloud infrastructure, applying zero-trust principles to workload communication and documenting reference architectures for engineering teams.

Join Causa Prima as a Senior AI / LLM Agent Engineer, where you will play a pivotal role in shaping our innovative product. You will design, develop, and manage autonomous agents that facilitate various critical business processes, including invoice validation, dispute resolution, inter-company negotiations, and cash flow optimization.Your ResponsibilitiesAgent Architecture — Create a robust multi-agent system focusing on agent boundaries, event contracts, orchestration patterns, and the integration of LLM reasoning with deterministic enforcement.Document Processing Pipeline — Develop a system for the ingestion, classification, and structured extraction of financial documents such as invoices and contracts using LLM-based parsing and vision models.Validation & Anomaly Detection — Implement business rule checks, three-way matching, and pricing discrepancy detection to ensure data integrity and identify anomalies over time.Integration Framework — Design integration solutions connecting with Gmail, Google Drive, Slack, banking APIs, crypto wallets, and accounting platforms, including robust authentication and data normalization processes.Knowledge Graph — Build a Neo4j context graph to capture implicit business knowledge, focusing on entity extraction and provenance tracking.Multi-LLM Strategy — Develop a strategy for selecting models per agent, establishing structured output contracts, and creating evaluation frameworks.Compliance & Security — Design systems that operate within a zero-trust model, ensuring agents verify against original data and manage outbound content securely to mitigate risks.QualificationsA minimum of 3 years of experience with Python and/or TypeScript in a production environment.Strong systems design acumen, with a focus on agent boundaries and failure modes.Proven hands-on experience with LLM-powered systems and document AI technologies.Ability to articulate when to use LLMs versus rules engines or traditional ML approaches.Experience in designing data pipelines and integration architectures in production.A strong understanding of security principles and their implications in system design.

Role overview Ebury is hiring an AI Platform Engineer for the Data Platform Engineering team based in Madrid (or Malaga). This hybrid position requires four days per week onsite and one day remote. The team is central to Ebury’s growth, focusing on building and maintaining the infrastructure that powers AI and agentic products throughout the company. What you will do Develop and maintain the Ebury Data Platform as part of the Data Platform Engineering team. Help build the Agentic Data Plane (ADP), which serves as a unified and governed interface for AI and agentic products. Design and implement features to simplify data communication and access, while maintaining governance, lineage, traceability, and replayability. Work closely with cross-functional domain teams to support secure and efficient deployment of AI and agentic products at scale. Work environment Hybrid schedule: four days onsite in Madrid (or Malaga), one day remote. Team values innovation, collaboration, and strong problem-solving skills. Supportive culture where team members are encouraged to grow and contribute to Ebury’s mission.

Join JetBrains, a leading software development company known for creating innovative tools for developers, as a Security Engineer specializing in Identity and Access Management (IAM). In this role, you will be pivotal in ensuring the security and integrity of our systems by managing user identities and access control mechanisms.

Are you passionate about leveraging AI technologies to enhance backend systems? Join docplanner as a Backend Engineer specializing in AI Integration. In this role, you will collaborate with a dynamic team to design, develop, and implement innovative solutions that integrate AI capabilities into our existing systems.Your expertise will contribute to optimizing processes and improving user experiences across our platforms. If you're ready to take your backend engineering skills to the next level while working with cutting-edge technology, we want to hear from you!

Join our innovative Notebooks team as a Staff Software Engineer specializing in AI/ML. At Datadog, our Notebooks are versatile tools for on-the-fly data analysis, collaborative investigations, and technical documentation. They facilitate seamless interaction between agents and users. Our team is at the forefront of developing AI-enhanced workflows for natural language data analysis, automated graph generation, and in-depth investigations. In this role, you will serve as a technical leader, dedicated to creating cutting-edge AI-powered functionalities. We are in search of a product-oriented ML engineer who possesses strong technical acumen, exceptional communication skills, and a proven history of spearheading impactful projects from inception to completion.At Datadog, we cherish our office culture for its collaborative spirit and the creativity it fosters. We adopt a hybrid work model to support our Datadogs in achieving a work-life balance that aligns with their unique needs.