Software Tool Engineer 2

🏢 Summary: Senior-level role responsible for designing, deploying, and supporting Cisco LAN, WiFi, and Infoblox DDI solutions across a global enterprise network. The position focuses on ensuring secure, high-performing connectivity, acting as SME and escalation point for complex network issues. It involves architecture leadership, integration with security infrastructure, and advanced operational support. 🗂️ Requirements: Bachelor’s degree in Computer Science, Information Technology or related field (or equivalent experience), 8+ years of network engineering experience, Proven experience with Cisco LAN and WiFi infrastructure, Proven experience with Infoblox DDI solutions, Expertise in Cisco Catalyst switches, Expertise in Cisco wireless controllers, Expertise in Infoblox DNS/DHCP/IPAM, Strong knowledge of TCP/IP, VLANs, STP, 802.1X, Experience with network monitoring and management tools 📃 Skills: Cisco, Infoblox, LAN, WiFi, DDI, DNS, DHCP, IPAM, TCP/IP, VLAN, STP, 802.1X, Catalyst, Wireless, Switching, Networking 🏢 Description: Summary: The CISCO LAN/WiFi & Infoblox Build and Support Expert is responsible for designing, deploying, and supporting Cisco LAN and WiFi infrastructure, alongside Infoblox DDI solutions, throughout Syensqo’s global network. This role ensures secure, reliable, and high-performing connectivity, acting as the subject matter expert (SME) for Cisco and Infoblox technologies. Main Responsibilities: Lead the architecture, deployment, and configuration of Cisco LAN (switching), WiFi (wireless), and Infoblox DDI solutions. Develop and maintain technical documentation, including network diagrams, implementation guides, and standard operating procedures. Integrate LAN, WiFi, and Infoblox solutions with existing network and security infrastructure. Collaborate with security, application, and infrastructure teams to ensure seamless integration. Provide advanced technical support for Cisco LAN, WiFi, and Infoblox environments, including incident response and performance optimization. Serve as the escalation point for complex network and DDI-related issues. Monitor network health, performance, and security proactively. Stay current with Cisco and Infoblox product updates and industry trends. Recommend and implement enhancements to improve network security and efficiency. Conduct knowledge transfer and training sessions for IT staff. Ensure deployments comply with security policies and regulatory requirements. Participate in audits, risk assessments, and documentation reviews. Key Requirements: Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience). 8+ years of experience in network engineering, specifically with Cisco LAN, WiFi, and Infoblox DDI. Deep expertise in Cisco Catalyst switches, Cisco wireless controllers, and Infoblox DNS/DHCP/IPAM platforms. Strong understanding of networking protocols (TCP/IP, VLANs, STP, 802.1X). Experience with network monitoring and management tools. Nice to Have: Relevant certifications (e.g., Cisco CCNP, Infoblox Certified Professional). Excellent analytical, troubleshooting, and communication skills. Ability to work independently and collaboratively in a global team environment. Other Details: Category: Qualifications & Experience Location: Global Team Structure: Cross-functional collaboration with teams including security, applications, and infrastructure. Compliance: Must adhere to Syensqo’s security policies and regulatory requirements.

🏢 Summary: The role focuses on owning and automating the network edge and security layer in a hybrid enterprise environment, with strong emphasis on F5 and Barracuda platforms. It centers on delivering high availability, disaster recovery, and DNS/SSL automation using network-as-code principles. The position requires hands-on configuration, automation, and monitoring of enterprise network and security infrastructure. 🗂️ Requirements: Strong hands-on experience with F5 BIG-IP including automation, Hands-on experience with Barracuda CloudGen Firewalls, Solid enterprise networking knowledge (routing, switching, VLANs), Experience designing HA solutions, Experience designing DR solutions, DNS management experience, SSL certificate management experience, Experience with traffic steering and geo-routing, Log collection and analysis experience 📃 Skills: F5, BIG-IP, LTM, APM, ASM, GTM, Barracuda, CloudGen, DNS, Cloudflare, APIs, IaC, Routing, Switching, VLAN, HA, DR, SSL, Geo-routing, Monitoring, Logging 🏢 Description: Tech stack: F5 BIG‑IP (LTM, APM, ASM, GTM) Barracuda CloudGen Firewall DNS platforms (e.g. Cloudflare) Automation via APIs / IaC Monitoring and log analysis platforms Requirements: Strong hands‑on experience with F5 BIG‑IP including automation Hands‑on experience with Barracuda CloudGen Firewalls Solid enterprise networking knowledge (routing, switching, VLANs) Experience designing HA and DR solutions DNS and SSL certificate management experience Experience with traffic steering and geo‑routing Log collection and analysis experience Nice to have: ASM and GTM experience Advanced DR automation scenarios Experienced in using AI tools in day-to-day workflow Project description: You will own the network edge, security appliances, and disaster‑recovery automation layer in a hybrid enterprise environment. The project emphasizes full automation, resilience, and standardized network‑as‑code delivery. Main responsibilities: Automate F5 and Barracuda configurations Design and automate HA and DR solutions Deliver DNS, SSL, and traffic steering automation Automate failover and failback procedures Coordinate monitoring and alerting with observability teams

🏢 Summary: The offer is for a Network Engineer responsible for designing, maintaining, and securing LAN, WAN, and VPN infrastructures across on-premise and cloud environments. The role focuses on high availability, network security, traffic analysis, and troubleshooting complex L2/L3 issues. The position involves participation in infrastructure projects, architecture reviews, and incident response for critical systems. 🗂️ Requirements: Minimum 3 years of experience in network administration and design, Strong knowledge of LAN, WAN, VPN, routing, VLAN, QoS, Hands-on experience with enterprise network devices, Knowledge of network security practices (segmentation, ACL, firewall, IPS/IDS), Ability to analyze network traffic and troubleshoot complex issues, Experience in infrastructure and cross-functional projects, Ability to work during incidents and under time pressure, Good technical English 📃 Skills: LAN, WAN, VPN, Routing, VLAN, QoS, ACL, Firewall, IPS, IDS, Switching, LoadBalancing, NetworkMonitoring 🏢 Description: Tasks Design and maintain LAN, WAN, and VPN topologies across on-premise and cloud environments. Configure and administer routers, switches, firewalls, and load balancers. Ensure high availability and redundancy of network infrastructure for critical systems. Diagnose L2/L3 issues, analyze traffic, and optimize routing, VLAN, QoS, and segmentation. Implement network security controls including ACLs, firewall policies, IPS/IDS, and trust zone isolation. Collaborate with IT and security teams on migrations, new deployments, and architecture changes. Participate in delivery projects as a network expert, including capacity estimation and architecture reviews. Configure network monitoring tools, analyze logs and packets, and restore connectivity during incidents. Requirements At least 3 years of experience in network administration and design. Strong knowledge of LAN/WAN/VPN, routing, VLAN, and QoS concepts. Hands-on experience with enterprise-grade network devices. Knowledge of network security practices (segmentation, ACL, firewall, IPS/IDS). Ability to analyze traffic and troubleshoot complex performance issues. Experience working cross-functionally on infrastructure projects. Ability to operate effectively during incidents and under time pressure. Good technical English. Nice to Have Network or security certifications (e.g., CCNA/CCNP, Fortinet, Palo Alto). Experience with hybrid infrastructure and multi-site connectivity. Familiarity with network monitoring and observability tooling. Experience in mission-critical environments. We Offer Work on high-availability infrastructure and critical network security. Real influence on networking standards and system communication architecture. Growth opportunities in Network and Security specialization. Stable employment in a modern company with a well-established market position. An attractive salary and benefits package (including private medical care and a sports card).

🏢 Summary: DevOps/Cloud Engineer role focused on managing and optimizing AWS infrastructure, implementing CI/CD pipelines, and maintaining production systems. The position emphasizes Infrastructure as Code, container orchestration, observability, and CDN configuration. You will automate, monitor, and scale cloud environments ensuring reliability, security, and performance. 🗂️ Requirements: Strong Linux/Unix administration, Understanding of Internet and web application architecture, Experience with observability (metrics, logs, tracing), Hands-on AWS infrastructure management, CI/CD pipeline implementation, Containerization and orchestration experience, Infrastructure as Code using Terraform/Terragrunt, Monitoring tools experience, CDN setup and management, Solid networking protocols knowledge, Scripting and automation skills (Bash, Python, JavaScript, TypeScript), Configuration management with Ansible, Production environment support experience 📃 Skills: Linux, Unix, AWS, Ansible, Kubernetes, Docker, Helm, Terraform, Terragrunt, Grafana, Kibana, DataDog, CloudWatch, CloudFront, Akamai, Bash, Python, JavaScript, TypeScript, GitHub, GitLab, Jenkins, Networking, CDN, Observability, CICD 🏢 Description: .Requirements You are good at Roaming around Linux/Unix systems and pinpointing problem root causes Understanding how the Internet and Web applications work under the hood Metrics, logs, distributed tracing and everything around observability Configuration management frameworks such as Ansible Maintaining applications in a production environment Being self-driven and working with little supervision towards a common team or company purpose Feeling humble and motivated by being able to learn/teach others Comfortable with DevOps methodologies and best practices You rock at Good Experience managing AWS Cloud Infrastructure. Provisioning resources, configuring networks, ensuring security, optimizing costs, implementing disaster recovery, and automating infrastructure management. Experience setting up CI/CD and AWS networking and accounts using Github, Github actions, Gitlab and/or Jenkins ). Experience with Containers and orchestration frameworks such as Kubernetes and Docker, preferably using Helm Charts. Experience with Infrastructure as Code (IaC) and it's tools, such as (i.e. preferably with Terraform,Terragrunt) Experienced with monitoring (i.e. preferably with Grafana, Kibana, DataDog. Cloud Watch also an option. Experienced Creating and Developing CDN using CloudFront and or AKAMAI. Solid knowldge of Networking protocols. Experienced with language for automation task and scripting such as Bash, Python, Javascript and Typescript. Very comfortable with English.

🏢 Summary: The offer is for a DevOps/Network Engineer role focused on designing and securing scalable network architectures across cloud and hybrid environments. The position involves automating infrastructure with IaC tools, managing cloud networking components, and integrating security into CI/CD pipelines. The role also includes monitoring, incident response, and supporting compliance and infrastructure hardening efforts. 🗂️ Requirements: Minimum 3 years experience in DevOps, Infrastructure, or Network Engineering, Hands-on experience with cloud networking in AWS, Azure, or GCP, Experience with Infrastructure as Code tools, Knowledge of CI/CD pipelines and DevOps practices, Experience with monitoring, logging, and alerting tools, Understanding of IAM and network security best practices, Ability to manage VPCs, VPNs, load balancers, and firewalls 📃 Skills: AWS, Azure, GCP, Terraform, Ansible, CICD, IAM, VPC, VPN, Firewalls, LoadBalancers, Kubernetes, ISO27001, SOC2, Monitoring, Logging 🏢 Description: Tasks Design and implement secure and scalable network architectures across cloud and hybrid environments Automate infrastructure using IaC tools (Terraform, Ansible) Manage and secure VPCs, VPNs, load balancers, and firewalls Ensure network segmentation and access control best practices Support CI/CD pipelines and integrate basic security mechanisms (e.g., secret handling) Monitor traffic, logs, and performance; respond to incidents Collaborate with security teams on infrastructure hardening Support compliance requirements (e.g., ISO 27001, SOC 2) Requirements At least 3 years of experience in DevOps, Infrastructure, or Network Engineering Hands-on experience with cloud networking (AWS / Azure / GCP) Experience with Infrastructure as Code and automation tools Knowledge of CI/CD pipelines and DevOps practices Ability to work with monitoring, logging, and alerting tools Basic understanding of security best practices (IAM, network security) Very good command of English (B2+/C1), both written and spoken Nice to have Experience with Kubernetes networking Exposure to security tools or vulnerability scanning Cloud or networking certifications (e.g., AWS, CCNA)

🏢 Summary: The offer is for a software engineer role focused on designing and optimizing high-performance, low-latency systems handling over 24 million queries per second. The position involves building scalable and reliable distributed components, improving performance, and developing monitoring and testing tools in a production environment. The role emphasizes high availability, scalability, and working with modern cloud and data technologies. 🗂️ Requirements: Proficiency in programming, Strong understanding of complex IT systems from hardware to algorithms, Knowledge of Internet protocols (DNS, HTTP, cookies), Knowledge of concurrent programming and distributed systems, Experience with monitoring and analyzing production systems, Ability to optimize system performance and resolve performance issues, Knowledge of high scalability and high availability concepts, C1 level English, C1 level Polish 📃 Skills: Java, Python, Aerospike, Memcached, GCP, BigQuery, MinIO, Kafka, Clickhouse, PostgreSQL, Elasticsearch, Kubernetes, Prometheus, Jenkins, Graphite, DNS, HTTP 🏢 Description: You Will: Design and programming of a wide range of modules and components as part of a system that supports over 24M queries per second and low latency. Work on the optimization of the developed software in terms of response time and resource consumption Ensure the reliability and scalability of the solutions built Create performance and correctness tests for new system components Analyse new technologies in terms of their applicability in production conditions Develop tools for monitoring and analysing the operation of the production system Continuous optimization of existing tools and processes Desired Experience: Proficiency in programming Excellent understanding of how complex IT systems work (from the hardware level, through software, to algorithmics) Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others) Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to continent level) Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it) The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production) General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability' C1 level in English and Polish Selected Technologies: Java, Python Aerospike, Memcached Google Cloud Platform, BigQuery, MinIO Kafka, Clickhouse PostgreSQL Elasticsearch Kubernetes, Prometheus 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 digital marketing, send us your CV, and we'll review it.

🏢 Summary: Software Engineer responsible for end-to-end development of a core network orchestration and service management platform. The role covers feature ownership, architecture design, secure coding, testing, release management, and complex issue resolution. It focuses on building and maintaining high-quality, reliable systems in a Linux-based environment. 🗂️ Requirements: 3–5 years of commercial experience in software engineering, Strong hands-on proficiency in C, Scripting skills in Python, Perl, or TCL, Practical experience with Linux environments, University degree in Engineering, Computer Science, or related technical field 📃 Skills: C, Python, Perl, TCL, Linux, Git, Gerrit, Docker, Java, Ethernet, Routing, Switching, Broadband, UnitTesting 🏢 Description: About the Role: You will play a pivotal role in driving the software development lifecycle for our core network orchestration and service management platform. Your daily responsibilities will include: Taking ownership of feature development, from analyzing requirements and estimating efforts to final delivery. Designing robust architectures and implementing high-quality code. Conducting thorough security impact assessments to ensure system integrity. Executing tests, maintaining comprehensive documentation, and managing software releases. Performing root-cause analysis, debugging complex technical issues, and resolving trouble reports. Ensuring the long-term health and maintainability of the product. Core Requirements: 3 to 5 years of commercial experience in a comparable software engineering capacity. Strong, hands-on proficiency in C programming . Solid scripting skills using Python, Perl, or TCL . Practical experience operating and developing within Linux environments. A University Degree in Engineering, Computer Science, or a related technical discipline. Highly Valued (Bonus Skills): Background in the telecommunications or data communications sector, with a specific focus on service activation, network management, and provisioning platforms. Deep understanding of broadband technologies, network topologies, Ethernet, and Routing/Switching protocols. Familiarity with version control and containerization tools (such as Git, Gerrit, or Docker). A strong habit of writing unit tests to ensure code reliability. Additional Advantages: Previous background in complex Systems Integration. Coding experience in Java. Proven ability to thrive within Agile frameworks. Experience collaborating smoothly with geographically distributed teams.

🏢 Summary: Senior-level DNS Engineering and Build SME role focused on leading design, deployment, and support of enterprise DDI infrastructure, ensuring high availability and quality standards. The position involves resolving complex incidents, driving root cause analysis, automating processes, and collaborating with network and security teams. The role requires strong expertise in DNS, DHCP, and IP address management within large-scale environments. 🗂️ Requirements: 5-8 years of experience managing or configuring enterprise networks or DDI solutions, Strong knowledge of DNS, DHCP and IP address management protocols, Experience with DDI tools such as TCPWave, Bluecat or Infoblox, Experience designing and deploying network infrastructure, Ability to perform root cause analysis and resolve complex incidents, Experience reviewing technical requirements and defining hardware specifications, Bachelor’s degree or equivalent experience 📃 Skills: DNS, DHCP, DDI, IPAM, TCPWave, Bluecat, Infoblox, Networking, Infrastructure, RCA, Automation 🏢 Description: Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview The DNS Engineering and Build SME is a senior level position responsible for leading a variety of engineering activities including the design, acquisition and deployment of hardware, software and network infrastructure in coordination with the Technology team. The overall objective of this role is to lead efforts to ensure quality standards are being met within existing and planned framework. Responsibilities: Create complex project plans, perform impact analyses solve/work high impact problems/projects, and provide resolutions to restore DDI services Drive Root Cause Analysis (RCA) post restoration of service Design testing approaches, complex processes, reporting streams, and create automation of repetitive tasks Review requirement documents, define hardware requirements and examine and update processes and procedures as necessary for DDI environment Collaborate with network architects, network security and network operations teams to implement best practices for DDI services. Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency. Qualifications: 5-8 years of experience in managing/configuring of Enterprise networks or DDI solutions Knowledge of DNS, DHCP and IP address Management protocols Experience with DDI tools (TCPWave, Bluecat or Infoblox) would be advantageous Ability to work with virtual and in-person teams, and work under pressure or to a deadline Ability to operate with a limited level of direct supervision. Experience in a Financial Services or large complex and/or global environment preferred Effective written and verbal communication skills Effective analytic/diagnostic skills Education: Bachelor’s degree/University degree or equivalent experience Master’s degree preferred We offer: By joining Citi Solutions Center Poland, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed) and enjoy a whole host of additional benefits such as: Private Medical Care Program Life Insurance Program Pension Plan contribution (PPE Program) Employee Assistance Program Paid Parental Leave Program (maternity and paternity leave) Sport Card Holidays Allowance Sport and team recreation activities Special offers and discounts for employees Access to an array of learning and development resources A discretional annual performance related bonus A chance to make a difference with various affinity networks and charity initiatives Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self every day.  We want the best talent around the world to be energized to join us, motivated to stay, and empowered to thrive. Sounds like Citi has everything you need? Then apply to discover the true extent of your capabilities.

🏢 Summary: The offer is for a Network Security Analyst responsible for operational firewall support, including rule implementation, policy optimization, VPN configuration, and security compliance activities. The role focuses on managing and validating firewall changes, supporting audits and incident investigations, and ensuring secure network segmentation. It involves hands-on work with multiple firewall technologies and close coordination with technical stakeholders. 🗂️ Requirements: Minimum 3+ years of experience in network security, Hands-on experience with FortiGate and FortiManager, Hands-on experience with CheckPoint firewalls, Experience with JunosSpace and FAZ, Experience implementing and validating firewall rules, Knowledge of IP subnetting and routing basics, Understanding of TCP and UDP protocols, Knowledge of NAT and VPN technologies, Experience with firewall log and flow analysis, Understanding of DPI and AppID concepts, Experience configuring IPsec VPN tunnels, Familiarity with SIEM tools, Experience with ITSM tools such as ServiceNow, Knowledge of network segmentation and ZeroTrust principles 📃 Skills: FortiGate, FortiManager, CheckPoint, JunosSpace, FAZ, TCP, UDP, NAT, VPN, IPsec, DPI, AppID, Subnetting, Routing, SIEM, ServiceNow, Excel, PowerBI, ITSM, Segmentation, ZeroTrust, Firewalls 🏢 Description: Minimum : 3+ Year Experience Technical requirements: FortiGate , Forti Manager , Checkpoint , Junos Space , FAZ – expertise: Flow Implementation , Firewall log/flow analysis (Check Point, Fortinet), IP subnetting, routing basics, TCP/UDP, DPI/APP-ID concepts, NAT, VPN Tools : SIEM basics, packet capture utilities, Excel/Power BI (preferred), ITSM (e.g., ServiceNow), collaboration tools. Security : Familiarity with segmentation (IT/OT/LAB/SHOP FLOOR), Zero Trust principles, and policy standardization. Soft Skills : Clear documentation, stakeholder communication, and attention to detail The Network Security Analyst is an operational support team member responsible for firewalls under his/her scope: Implement flows or rules on firewalls. Perform logical post-validation after implementation. Review and optimize firewall policies. Support security compliance and audits. Configure and coordinate IPSEC VPN tunnels end-to-end. Manage firewall policies and ensure compliance. Support security incident investigations. Handle emergency business requests for flow openings with priority. Regular interactions with: IS&T E2E PM, Local IS&T Business Partners, Solution Architects, Functional Teams, Business End Users, and Operations Teams.

🏢 Summary: Full-time or contract remote role focused on developing and optimizing DPDK-based components for high-performance, low-latency packet processing in high-speed networking environments. The position involves tuning, debugging, and profiling network traffic at line rate while ensuring integration with DPI libraries and network stacks. The role also includes implementing scalability, error recovery, and comprehensive performance testing strategies. 🗂️ Requirements: 5+ years of C/C++ programming experience, Strong expertise in DPDK, Deep understanding of TCP/IP and UDP protocols, Experience in packet processing and network programming, Knowledge of Linux internals, Experience with kernel bypass techniques, Experience with high-speed networking (10G/40G/100G), Ability to perform low-level debugging and profiling 📃 Skills: C, C++, DPDK, TCP/IP, UDP, Linux, DPDK, gRPC, NIC, PCIe, CI/CD 🏢 Description: Job Type: Full-time/Contract Work Model: Remote Key Responsibilities: Develop and optimize DPDK-based components for high-performance packet processing Tune DPDK configurations for low latency and maximum throughput Debug and profile network packet flows at line rate Ensure seamless integration with DPI libraries and network stacks Implement scalability and error recovery strategies Develop and maintain comprehensive performance tests Requirements: 5+ years of experience in C/C++ programming Strong expertise in DPDK (Data Plane Development Kit) Deep understanding of network protocols (TCP/IP, UDP) Experience with packet processing and network programming Knowledge of Linux internals and kernel bypass techniques Experience with high-speed networking (10G/40G/100G) Skills in low-level debugging and profiling Nice to Have: Experience with gRPC Understanding of NICs and PCIe Hardware offloading techniques CI/CD pipeline knowledge Automated performance testing experience