Senior Optimization Engineer

Pinetree AB

OFFER Net Insight is a pioneering technology company within media networks, resource optimization and time synchronization. Their Zyntai solution is used to distribute highly accurate time in critical 5G and network infrastructure — with nanosecond-level precision and without relying on GNSS. We are now looking for a senior engineer with deep knowledge of automatic control, estimation, signal processing and mathematical modelling — combined with strong software engineering skills in modern C++ and Python. This is not a general C++ role. It is a role for someone who wants to work close to the core algorithms, understand the underlying control problem, and turn advanced theory into robust production software. You will join a highly technical team working with a modern product, senior colleagues and complex real-world engineering challenges. Some of the benefits of working at Net Insight: A world leader in media networks, resource optimization and synchronization technology Work with advanced control algorithms in a real-world, large-scale product A highly technical environment with modern tools and senior colleagues Open and flat organization with strong teamwork and knowledge sharing Family-friendly company with flexible working hours Unusually low turnover and high employee satisfaction   THE PRODUCT AREA Zyntai provides critical infrastructure, such as 5G base stations, with extremely accurate time synchronization. A Zyntai network consists of hundreds or thousands of TimeNodes that continuously exchange time information and measurements. The system uses this data to estimate network and oscillator behavior and to control the local clock in each node. This requires advanced algorithms within control theory, estimation, filtering, signal processing and mathematical optimization. The core challenge is to distribute time over complex networks with extremely high accuracy — without depending on GNSS. For more info about the product, visit: https://netinsight.net/5g-sync   THE ROLE AND TEAMS You will work in the team responsible for the core synchronization functionality in Zyntai. The team develops the algorithms and software used to process measurement data, estimate system behavior and control the oscillator in each TimeNode. You will work with methods such as Kalman filtering, Model Predictive Control, PI/PID controllers, state estimation, signal processing and mathematical optimization. Most implementation is done in modern C++ in the TimeNodes. Python is used for modelling, analysis, tooling, testing and development in Zyntai Director, Net Insight’s Kubernetes-based orchestration system for managing TimeNodes. You need to be comfortable moving between theory and implementation: from mathematical reasoning and control system design to production-quality software in a distributed system. YOUR PROFILE We are looking for a senior engineer who combines strong knowledge within control systems with the ability to build high-quality software. You probably enjoy understanding the underlying system — not just the codebase. You like mathematical and algorithmic challenges, and you are comfortable discussing control loops, estimation, stability, filtering, optimization and real-world system behavior. You do not need to have worked with time synchronization before, but you need strong experience from automatic control, applied mathematics, signal processing, robotics, cybernetics, telecom, industrial systems or similar areas. You need to have: Deep knowledge of automatic control, control theory or cybernetics Practical experience from designing, analysing, tuning or implementing control algorithms Strong mathematical foundation within estimation, filtering, optimization, statistics, signal processing or dynamic systems Experience from methods such as Kalman filtering, MPC, PI/PID, observers, state estimation or system identification Strong software engineering skills in modern C++, preferably C++20/23 Good Python skills Experience from Linux-based development Ability to turn complex algorithms into robust, maintainable production code It is an advantage if you have experience from: Time synchronization, PTP, NTP, SyncE or GNSS-independent systems Distributed or networked systems TCP/IP and network communication Kubernetes or cloud-native systems Real-time or near-real-time systems Graph theory, statistics or mathematical optimization Telecom, 5G, industrial systems or robotics This role is a great fit if you want to work where mathematics, control systems and software engineering meet.   ABOUT NET INSIGHT Net Insight is a global leader in media networks, resource optimization, and streaming solutions. With more than 25 years of experience, Net Insight is a trusted and important partner and a leading force in the media tech industry in creating a better media experience. More than 500 world-class customers run mission-critical media services using Net Insight’s solutions in more than 70 countries worldwide.  Net Insight is listed on Nasdaq Stockholm. For more info, visit https://netinsight.net/ ABOUT PINETREE At Pinetree, we have a vision and mission to differentiate ourselves from the crowd and are Sweden's contenders in talent search and matching. By working as an agency, the value to you as an employee is that we have a wide network of partner companies that we continuously ensure high-quality standards. This recruitment is direct employment at Net Insight AB and all applications, questions, administration, and recruitment processes are managed by Pinetree AB.

H & M Hennes & Mauritz GBC AB

Job Description Join our Cyber Security Engineering unit, where innovation and security drive us. We are transforming technology with modern Network Security, integrations and cloud services. We are looking for a highly skilled and experienced Senior Cyber Security Engineer to join our Network Security Engineering team. This role involves architecting, designing, implementing, and maintaining robust security measures to protect our global network infrastructure. The ideal candidate will blend theoretical knowledge with hands-on expertise. This role requires a deep understanding of cybersecurity principles, Network Security technologies, and the ability to collaborate across multiple globally dispersed stakeholders and teams. WHAT YOU’LL DO Lead the development, optimization and integration of network security policies, rules and monitoring across platforms such as NDR, SSE, SD‑WAN and proxy solutions Design and improve network security solutions across branches, stores and data centers, ensuring strong alignment with business and security needs Conduct security architecture reviews, risk assessments and threat modelling, and drive hardening initiatives across our network landscape Modernize network security by transitioning from legacy systems to modern SSE and ZTNA solutions, supported by clear roadmaps, policies and plans Monitor and enhance the performance, availability and reliability of network security solutions, ensuring compliance with ISO, NIST, GDPR and internal standards Design, configure and troubleshoot network security devices and services across on‑prem and cloud environments, providing advanced Level‑3 support when needed WHO YOU'LL WORK WITH You’ll join a friendly and collaborative Network Security Engineering team of seven, soon to be eight, working closely with colleagues across Business Tech. Your daily partners will include network SMEs, Cyber Security Advisors, Core Platforms and Global Infrastructure Services, as well as teams supporting stores, warehouses and new market entries. You’ll also connect with external partners and contribute to cross‑functional projects where network and cyber security come together. This is a highly collaborative environment where your expertise will help shape our security posture and uplift the team’s cyber maturity. WHO YOU ARE 6+ years of experience in cybersecurity engineering, with a focus on network environments Strong, practical knowledge of: Network security technologies (firewalls, IDS/IPS, SWG, SASE, VPN, CASB, ZTNA), Cloud platforms: Azure, GCP, Security architecture methodologies and governance frameworks Expertise in network security solutions and products provided by Cisco, HP Aruba, Zscaler and Citrix NetScaler (proven by certificates) Strong knowledge of risk assessment and security control frameworks (ISO 27001, NIST). Familiarity with security maturity models including C2M2 Excellent ability to translate security requirements into implementable engineering solutions. Strong understanding of IP networking and protocols, including IPsec, HSRP, BGP, OSPF, 802.11, and QoS. Understand regulatory and compliance requirements (GDPR, PCI-DSS, Schrems, etc.). Independent problem-solving, addressing complex security challenges with minimal supervision. Preferred qualifications: CCNP (Security) or higher-level certifications such as the CCIE. CISSP or OSCP security certifications. Azure Security Engineer, or GCP Security Engineer certification. Experience with Agile methodologies and tools (e.g., Jira/Confluence) WHO WE ARE H&M is a fashion brand that offers the latest styles and inspiration, from fashion pieces and unique designer collaborations to affordable wardrobe essentials. Our business idea is fashion & quality at the best price in a sustainable way. Learn more about H&M here. WHY YOU’LL LOVE WORKING HERE Benefits All our employees are included in our H&M Incentive Program (HIP) All our employees receive a staff discount card, which is usable on all our H&M Group brands in stores and online. Brands covered by the discount are H&M (Beauty and Move included), COS, Weekday, Monki, H&M HOME, & Other Stories, ARKET. Work-life balance, 30 days’ vacation and wellness allowance 4000 SEK/yearly Access to Benify, for discounts on e.g. Gym memberships, travel, hotels and many other great deals. Compensation boost during parental leave In addition to our global benefits, all our local markets offer different competitive perks and benefits. Please note that they may differ between employment type and countries. Inclusion & Diversity H&M is a part of H&M Group. At H&M Group, we’re determined to create and maintain inclusive, diverse and equitable workplaces throughout our organization. Our teams should consist of a variety of people that share and combine their knowledge, experience and ideas. Having a diverse workforce leads to a positive impact on how we address challenges, on what we perceive possible and on how we choose to relate to our colleagues and customers all over the world. Hence all diversity dimensions are taken into consideration in our recruitment process. We are committed to a recruitment process that is fair, equitable, and based on competency. We therefore kindly ask you to not attach a cover letter in your application.

H & M Hennes & Mauritz GBC AB

Job Description Join our Cyber Security Engineering unit, where innovation and security drive us. We are transforming technology with modern Network Security, integrations and cloud services. We are looking for a highly skilled and experienced Senior Cyber Security Engineer to join our Network Security Engineering team. This role involves architecting, designing, implementing, and maintaining robust security measures to protect our global network infrastructure. The ideal candidate will blend theoretical knowledge with hands-on expertise. This role requires a deep understanding of cybersecurity principles, Network Security technologies, and the ability to collaborate across multiple globally dispersed stakeholders and teams. WHAT YOU’LL DO Lead the development, optimization and integration of network security policies, rules and monitoring across platforms such as NDR, SSE, SD‑WAN and proxy solutions Design and improve network security solutions across branches, stores and data centers, ensuring strong alignment with business and security needs Conduct security architecture reviews, risk assessments and threat modelling, and drive hardening initiatives across our network landscape Modernize network security by transitioning from legacy systems to modern SSE and ZTNA solutions, supported by clear roadmaps, policies and plans Monitor and enhance the performance, availability and reliability of network security solutions, ensuring compliance with ISO, NIST, GDPR and internal standards Design, configure and troubleshoot network security devices and services across on‑prem and cloud environments, providing advanced Level‑3 support when needed WHO YOU'LL WORK WITH You’ll join a friendly and collaborative Network Security Engineering team of seven, soon to be eight, working closely with colleagues across Business Tech. Your daily partners will include network SMEs, Cyber Security Advisors, Core Platforms and Global Infrastructure Services, as well as teams supporting stores, warehouses and new market entries. You’ll also connect with external partners and contribute to cross‑functional projects where network and cyber security come together. This is a highly collaborative environment where your expertise will help shape our security posture and uplift the team’s cyber maturity. WHO YOU ARE 6+ years of experience in cybersecurity engineering, with a focus on network environments Strong, practical knowledge of: Network security technologies (firewalls, IDS/IPS, SWG, SASE, VPN, CASB, ZTNA), Cloud platforms: Azure, GCP, Security architecture methodologies and governance frameworks Expertise in network security solutions and products provided by Cisco, HP Aruba, Zscaler and Citrix NetScaler (proven by certificates) Strong knowledge of risk assessment and security control frameworks (ISO 27001, NIST). Familiarity with security maturity models including C2M2 Excellent ability to translate security requirements into implementable engineering solutions. Strong understanding of IP networking and protocols, including IPsec, HSRP, BGP, OSPF, 802.11, and QoS. Understand regulatory and compliance requirements (GDPR, PCI-DSS, Schrems, etc.). Independent problem-solving, addressing complex security challenges with minimal supervision. Preferred qualifications: CCNP (Security) or higher-level certifications such as the CCIE. CISSP or OSCP security certifications. Azure Security Engineer, or GCP Security Engineer certification. Experience with Agile methodologies and tools (e.g., Jira/Confluence) WHO WE ARE H&M is a fashion brand that offers the latest styles and inspiration, from fashion pieces and unique designer collaborations to affordable wardrobe essentials. Our business idea is fashion & quality at the best price in a sustainable way. Learn more about H&M here. WHY YOU’LL LOVE WORKING HERE Benefits All our employees are included in our H&M Incentive Program (HIP) All our employees receive a staff discount card, which is usable on all our H&M Group brands in stores and online. Brands covered by the discount are H&M (Beauty and Move included), COS, Weekday, Monki, H&M HOME, & Other Stories, ARKET. Work-life balance, 30 days’ vacation and wellness allowance 4000 SEK/yearly Access to Benify, for discounts on e.g. Gym memberships, travel, hotels and many other great deals. Compensation boost during parental leave In addition to our global benefits, all our local markets offer different competitive perks and benefits. Please note that they may differ between employment type and countries. Inclusion & Diversity H&M is a part of H&M Group. At H&M Group, we’re determined to create and maintain inclusive, diverse and equitable workplaces throughout our organization. Our teams should consist of a variety of people that share and combine their knowledge, experience and ideas. Having a diverse workforce leads to a positive impact on how we address challenges, on what we perceive possible and on how we choose to relate to our colleagues and customers all over the world. Hence all diversity dimensions are taken into consideration in our recruitment process. We are committed to a recruitment process that is fair, equitable, and based on competency. We therefore kindly ask you to not attach a cover letter in your application.