Senior Systems/Networks Engineer (Tier 3) at devexperts | Sofia

Join devexperts as a Senior Systems/Networks Engineer (Tier 3) where you will play a crucial role in managing and optimizing our network and systems infrastructure. You will be responsible for troubleshooting complex issues, implementing scalable solutions, and collaborating with cross-functional teams to enhance system performance and reliability.

Join our talented team at devexperts as a Backend Engineer, where you'll play a pivotal role in developing cutting-edge software solutions. Your expertise in backend technologies will help us enhance our products and provide exceptional service to our clients.

Join our dynamic team at devexperts as a Business Analyst, where your analytical skills will drive impactful solutions in our client projects. You'll collaborate with cross-functional teams to gather requirements, analyze data, and recommend enhancements to optimize business processes. If you are passionate about utilizing data to inform strategic decisions and eager to work in a fast-paced environment, we would love to hear from you!

Join our dynamic Information Security Team at Devexperts as an Application Security Engineer. In this pivotal role, you will collaborate with software development teams, product owners, and other stakeholders to establish, implement, and uphold rigorous security practices throughout the software development lifecycle (SDLC).Your primary responsibilities will include identifying and mitigating security vulnerabilities across applications, systems, and APIs. You will ensure that secure coding practices are followed and assist in maintaining compliance with key security standards such as OWASP Top 10, NIST, and ISO/IEC 27001.This position is critical in enhancing our organization's security posture, advocating for security best practices, and safeguarding the integrity of our software applications.Key Responsibilities:Conduct regular security assessments of applications, including code reviews, static/dynamic analysis, and penetration testing.Collaborate with development teams to design and integrate security controls into the SDLC.Lead efforts to identify and remediate security vulnerabilities in applications, APIs, and third-party services.Provide technical guidance on secure coding practices, threat modeling, and vulnerability management.Enforce security best practices for secure coding, API security, and encryption across application architectures.Stay updated on the latest security threats, vulnerabilities, and trends to proactively mitigate risks.Develop and maintain automated security testing tools and processes for continuous security integration within CI/CD pipelines.Support risk assessments and threat modeling for new and existing applications, prioritizing remediation efforts.Participate in incident response activities related to application security, bringing expertise to investigate and resolve security breaches.Create and deliver security training to developers, fostering a culture of security awareness within teams.Assist in tracking and verifying the resolution of identified vulnerabilities.Ensure compliance with internal security standards and external regulatory requirements (e.g., GDPR, PCI-DSS, HIPAA).Work collaboratively with cross-functional teams, including DevOps and security operations, to ensure a unified approach to application security.

Sutherland is looking for a Senior Network Engineer with deep experience in Cisco technologies to join the team in Sofia, Bulgaria. This position focuses on shaping and maintaining advanced network systems that support business operations. Role overview The Senior Network Engineer will design, implement, and support complex network solutions. The role involves working on projects that require high availability and strong security standards. Collaboration with other technical teams is a key part of the work. What you will do Design and deploy advanced network architectures using Cisco platforms Maintain and optimize existing network infrastructure Troubleshoot and resolve network issues to ensure reliability Contribute to strategies that improve network performance and security Requirements Extensive experience with Cisco networking technologies Strong background in network design, implementation, and support Ability to solve complex technical problems and drive improvements

Join Tieto Tech Consulting as a Senior Network Engineer specializing in Messaging. In this pivotal role, you will design, implement, and support advanced network systems to ensure seamless communication across various platforms. You will collaborate with cross-functional teams to enhance our messaging infrastructure, troubleshoot complex network issues, and develop innovative solutions that drive operational excellence.

Devexperts is looking for an Application Support Engineer - Level 1 based in Sofia. This entry-level role centers on providing technical support for customers using the company’s applications. Role overview The position involves working directly with clients to resolve issues and answer questions. Timely troubleshooting and clear communication help ensure customers can use Devexperts’ products without interruption. What you will do Respond to customer inquiries about application functionality Troubleshoot technical problems as they arise Assist clients in navigating and using Devexperts’ software Requirements Interest in technical support and problem solving Strong communication skills Ability to work onsite in Sofia

As part of our ongoing expansion, we are eager to enhance our relationships with technology professionals by maintaining an open channel for future opportunities and upcoming projects. This is a talent pool opportunity in Bulgaria, where we are currently welcoming spontaneous applications to establish a robust pipeline of skilled QA Engineers for when relevant positions become available.We continuously seek to engage with talented QA Engineers interested in joining our team for potential future roles.Our QA engineers employ the best QA/QAOps practices. We collaborate within multicultural, distributed teams, working alongside developers, business analysts, and product stakeholders in an agile (Scrum/Kanban) environment.Technologies We Work With:While the specific projects and technology stacks may vary, you could work with a range of technologies:Backend technologies -- C#, Java, and APIsFrontend -- React, Angular, and other frameworksMobile -- web and nativeTypical Responsibilities Include:Designing and implementing a comprehensive test strategy,Developing and maintaining effective testing practices,Sharing and promoting knowledge and best practices across the team.

Yotpo is at the forefront of transforming trust and loyalty in the eCommerce landscape. Leveraging AI-driven Reviews and Loyalty solutions, we empower brands to convert casual browsers into dedicated customers and advocates. With trusted integrations across the eCommerce ecosystem and a robust network of over 30,000 global brands, Yotpo delivers unparalleled omnichannel experiences that enhance conversion rates, foster customer relationships, and drive sustainable growth.Our mission is to help brands cultivate lifelong customer loyalty through innovative reviews and loyalty solutions.We operate globally, with teams in the US, Canada, UK, Israel, Bulgaria, and Australia, and we are continually expanding. Our primary focus is to provide the best technology available in the industry.Excited to learn more? Check out our latest brand video.If this sounds appealing to you, keep reading—we are on the lookout for top talent!About the RoleAs a Tier 2 Technical Support Engineer, you will be an integral part of our global support team. Your responsibilities will include addressing complex technical challenges, serving as a pivotal escalation point for the support team, and collaborating closely with Product and R&D teams to identify root causes and develop effective long-term solutions.This position extends beyond merely resolving tickets; we seek an individual who demonstrates strong ownership, sound judgment, and the capability to bring clarity to complex situations. You will help identify systemic issues, enhance support operations, and contribute to the broader team’s growth through knowledge sharing, mentorship, and cross-functional collaboration.

Join our innovative team at Tieto Tech Consulting as a Senior IP Network Engineer. In this pivotal role, you will leverage your extensive knowledge and experience in network engineering to design, implement, and optimize complex IP networks. Your expertise will contribute to enhancing our clients' operational efficiency and performance.As a senior engineer, you will work closely with cross-functional teams, leading projects and mentoring junior staff, while ensuring that best practices in network security and performance are upheld. If you are passionate about technology and thrive in a fast-paced environment, we would love to hear from you!

About Man GroupMan Group is a leading global alternative investment management firm dedicated to delivering exceptional performance for discerning clients through our Systematic, Discretionary, and Solutions offerings. Leveraging our expertise and cutting-edge technology, we offer single and multi-manager investment strategies grounded in extensive research, spanning across public and private markets with a strong emphasis on alternative assets. Our partnership approach enables us to build meaningful relationships with clients, crafting tailored solutions that align with their investment objectives and those of the millions of retirees and savers they represent.Headquartered in London, we manage assets totaling $227.6 billion* and operate from multiple offices worldwide. Man Group plc is publicly traded on the London Stock Exchange under the ticker EMG.LN and is part of the FTSE 250 Index. For more details, please visit www.man.com.* As of 31 December 2025The TeamOur Platform Engineering team serves as the backbone of our technological infrastructure. We empower investment teams with the necessary tools to scale their strategies efficiently. This includes vast data storage solutions, high-performance computing in our data centers, and state-of-the-art on-premises database deployments. Additionally, we prioritize the security of Man Group and automate information security processes, ensuring smooth operations across the firm.As a Network Engineer in the Infrastructure Engineering department, you will be integral to a team responsible for constructing and maintaining the platform that drives Man Group's hedge funds. Your enthusiasm for utilizing AI development tools to enhance delivery and promote their integration within the team will be highly valued.

Your Impactful Mission: As a Network Operations Manager, you will...Provide leadership with vision and operational oversightOversee, mentor, and develop two distinct network teams: Network Operations & Network Automation.Establish strategic direction and a long-term vision for network operations that aligns with product priorities and business objectives.Encourage a high-trust, high-performance culture emphasizing operational excellence, accountability, and ongoing learning.Ensure resilient, secure, and highly available network operationsManage daily operations across globally distributed network environments that support mission-critical services.Take ownership of incident management, including queue health, prioritization, escalation pathways, and the complete lifecycle of network incidents.Lead major incident responses, triage, decision-making, and cross-team coordination in alignment with Playtech’s Critical Incident Management framework.Guarantee that infrastructure is audit-ready, secure, maintained, monitored, and thoroughly documented.Design, innovate, and enhance the network architectureDirect the design and deployment of robust, secure, fault-tolerant global network solutions.Enforce and uphold network security standards including firewalls, segmentation, access controls, and encryption.Implement and enhance monitoring & alerting frameworks to improve visibility and reduce Mean Time to Recovery (MTTR).Scale operations through automation, Infrastructure-as-Code, and NetDevOps practicesPromote modern Network Automation, Infrastructure-as-Code, and API-driven operations.Establish consistent change management processes utilizing automation to minimize toil and operational risk.Collaborate with Platform, Security, and Infrastructure Engineering teams to develop standardized deployments, templates, and CI/CD-style network change pipelines.Engage and collaborate across the organizationWork in close partnership with senior leadership.Manage vendor relationships, operational budgets, and technology procurement initiatives.Effectively communicate intricate network topics to both technical and non-technical stakeholders.

We are seeking a highly skilled Senior System Engineer to join our innovative team at Mangroup. In this role, you will be responsible for designing, implementing, and maintaining complex systems that meet the evolving needs of our clients. Your expertise will contribute to the development of cutting-edge solutions, ensuring optimal performance and reliability.As a Senior System Engineer, you will collaborate with cross-functional teams to drive projects from conception to deployment. You will leverage your technical knowledge and problem-solving abilities to tackle challenges and deliver exceptional results.

Genius Sports is at the forefront of transforming the sporting experience. By integrating cutting-edge technology with unparalleled live data, we are ushering in a new era of sports for fans around the globe, offering them experiences that are more immersive, interactive, and personalized than ever before. Learn more at geniussports.com.THE ROLE: As a Senior Network Technician, you will play a crucial role in the deployment of GeniusIQ, our state-of-the-art tracking system, in sports venues worldwide. Your expertise will serve as an escalation point for complex technical queries while also enabling the team to enhance operational efficiency through technical improvements.Key Responsibilities:Oversee IT issue tracking and resolution for a robust fleet of bare-metal Linux servers and network equipment across hundreds of sports venues in Europe.Assist venue operations coordinators in the preparation and installation of equipment, utilizing automation processes developed by our site reliability engineers.Engage positively with external venue IT and management personnel.Collaborate with software engineers to resolve common technical issues.WHAT YOU'LL BRING:A minimum of 5 years of experience in system and network administration, particularly with infrastructures comprising over 100 Linux servers.A comprehensive understanding of the Linux server stack, including OS boot and installation, systems and networking, container deployment, logging, metrics & monitoring, and out-of-band management.A solid grasp of OSI network layers 2-3-4, including network configuration aspects such as switching, VLANs, routing, firewall rules, ARP, DHCP, DNS, and TCP.Proficiency in Bash scripting.Exceptional communication skills, capable of articulating concepts tailored to diverse audiences, including remote hands, engineering teams, and clients.IT WILL BE A BONUS IF YOU HAVE:Experience in managing remote fleets without physical access.Familiarity with automating Linux and network equipment configurations using Ansible.Experience with AWS services such as EC2, S3, VPC, and IAM.We pride ourselves on fostering an 'office-first' culture, maximizing collaboration and learning opportunities. Our hybrid working models adapt to your role and location.

Join Tietoevry as a Senior Messaging Engineer and play a pivotal role in delivering innovative messaging solutions that enhance communication systems. You will collaborate with cross-functional teams to design, implement, and maintain robust messaging frameworks that ensure seamless data flow and connectivity. Your expertise will be crucial in optimizing performance and reliability while adhering to best practices in software development.

Join Our Mission to Empower Wealth BuildingAt Trading 212, we are transforming the landscape of trading and investing. Our innovative products are designed to empower individuals to build their wealth effectively.We believe that a culture rooted in excellence and rapid innovation is essential to our success.With over 4.5 million clients and more than €30 billion in assets under management, we have quickly established a reputation for scale and trust in the financial industry.Your ResponsibilitiesArchitect and implement dynamically scalable, self-healing infrastructure and applications across public and private cloud platforms.Continuously enhance and automate infrastructure designs to boost resilience and scalability.Utilize IaaS automation tools such as Terraform, AWS CloudFormation, and Ansible.Facilitate the migration of environments from on-premise infrastructure to AWS/GCP.Analyze application and infrastructure KPIs, proactively identifying and addressing bottlenecks and potential issues.Design infrastructures that ensure zero downtime.Drive continuous performance improvements and troubleshoot critical components.Engage in knowledge sharing with colleagues to foster growth as the company evolves, valuing honest feedback as a crucial tool for success.Required QualificationsProven expertise in public cloud platforms, specifically AWS and GCP.In-depth understanding of DevOps principles and their practical application in various workflows; experience with CI/CD tools such as GitHub, GitLab, or Jenkins.Hands-on experience with containerization technologies and orchestration systems, including Docker, Kubernetes, EKS/ECS, and Nomad.Solid understanding of Infrastructure as Code practices using tools like Terraform and AWS CloudFormation.Experience in implementing and maintaining configuration management tools such as Puppet and Ansible.Expertise in relational databases including AWS RDS, MySQL/MariaDB/PostgreSQL, and TimescaleDB.Familiarity with messaging services like Amazon MSK, Amazon MQ, Kafka, and RabbitMQ.Strong proficiency in Python and Bash scripting.Preferred QualificationsExperience with on-premise private cloud infrastructure.

Join Our Mission to Empower Wealth BuildingAt trading212, we are revolutionizing the trading and investing landscape by crafting innovative products that resonate with our users.We champion a culture of excellence and agility, driving our success in a rapidly evolving market.Currently, we proudly serve over 4.5 million clients, managing more than €30 billion in assets—a true testament to the trust we have established in just a few years.Your RoleDesign and implement solutions with a comprehensive understanding of business challenges, our service architecture, and the relevant technologies and infrastructure.Be involved in every phase of the software development lifecycle (SDLC)—from gathering requirements and designing implementation to coding, testing, deploying, and monitoring. You will take full ownership of your code and ensure its continuous improvement.Develop robust solutions focused on performance, scalability, and resilience—your code will operate in a high-stakes environment where downtime, latency, and data loss are unacceptable.Collaborate within small, autonomous teams that operate on short release cycles. We value agile methodologies and a balanced approach to processes that avoid chaos without compromising speed.Engage in knowledge sharing and continuous learning with colleagues. As our company evolves, so must we, and constructive feedback is one of our strongest tools for growth. QualificationsProven experience in developing services within a microservice architecture, having contributed to a highly scalable and performant system comprising over 200 microservices.Strong understanding of common communication protocols. You should be adept at utilizing HTTP/WebSockets and AMQP, with the ability to choose the appropriate protocol based on the context.Familiarity with at least one widely-used web framework, regardless of programming language. Our language-agnostic system empowers engineers to select the most suitable language for specific tasks. We strive for a harmonious balance between cutting-edge technologies and proven solutions.A comprehensive understanding of system performance, scalability, and security best practices.

Join our dynamic team as a Senior DevOps Engineer at Mirantis, where you will spearhead the design, implementation, and enhancement of customer infrastructure and CI/CD pipelines. Your expertise will be pivotal in collaborating with cross-functional teams to ensure optimal system performance, scalability, and security. In this influential role, you will also provide mentorship to junior engineers, champion automation initiatives, and play a key part in strategic decisions concerning infrastructure and deployment practices. This position is perfect for a seasoned professional with a strong foundation in cloud technologies, containerization, scripting, and DevOps best practices.Main Responsibilities:Architect and implement customer infrastructure across various cloud providers and bare metal environmentsDevelop and oversee Kubernetes clusters for microservices-based applicationsEnhance and streamline CI/CD pipelines for efficient software deliveryDesign, monitor, and manage development, staging, and production environmentsFacilitate knowledge sharing with customers during deployment projectsCollaborate with internationally distributed teams to tackle technical challenges and drive process improvementsMentor and cultivate the growth of fellow DevOps EngineersContribute to the Mirantis deployment knowledge baseContinuously enhance tools and technologies used in our processes

As part of our continuous expansion, we are eager to connect with technology experts and keep an open line for future prospects and exciting projects. This is a talent pool opportunity in Portugal, where we are currently welcoming spontaneous applications to establish a robust pipeline of proficient professionals for when relevant positions arise.We are actively seeking talented Java Backend Developers who are interested in joining our Research & Development teams for future opportunities.Our teams are responsible for developing and maintaining high-performance, low-latency platforms utilized by thousands of users globally every day. The backend services we create manage intricate business processes such as order processing, validation, routing, data reconciliation, and performance-critical calculations. We prioritize code quality, reliability, and scalability, achieving this through meticulous design, peer reviews, and thorough testing. Our engineers operate in multicultural, distributed teams, collaborating with QAs, frontend developers, business analysts, and product stakeholders in an agile (Scrum/Kanban) environment.Technologies We Work With:Core Java (11+): Collections, Streams, Threads, Concurrency, JVM tuningFrameworks & Tools: Spring, JUnit5, AssertJ, MockitoInfrastructure: Docker, PostgreSQL, Liquibase, SplunkCollaboration & CI/CD: Atlassian suite, Slack, TeamCity, SonarOur Work Culture:We are passionate about coding in Java and delving into the underlying mechanics (threads, collections, memory, JVM).We utilize solid computer science foundations to address complex challenges with efficient solutions.We are committed to writing clean, maintainable, and well-tested code.We transform ideas from concept to production and celebrate our achievements together.We foster a collaborative, supportive, and feedback-driven environment across cultures and time zones.We communicate in English (B2+).

In the ever-evolving landscape of payment processing, businesses seek reliable and strategic partners to fuel their growth.Welcome to Nuvei, a pioneering Canadian fintech company dedicated to accelerating our clients' businesses globally. Our modular, flexible, and scalable technology empowers leading companies to accept next-gen payments, explore all payout options, and leverage services in card issuing, banking, risk, and fraud management. With a presence in over 200 markets, local acquiring in 50, and support for 150 currencies alongside 700 alternative payment methods, Nuvei equips customers and partners with the tools and insights necessary for local and global success through a seamless integration experience.We embody our core values at Nuvei and excel in solving intricate challenges. Our commitment to continuous product enhancement and unparalleled customer service drives us to seek exceptional talent to join our journey!Your Mission:As a System Analyst at Nuvei, you will play a pivotal role in our R&D department. Your primary responsibilities will involve comprehending business requirements and designing systems that fulfill these needs. You will serve as a vital link between our product and development teams, managing cross-country projects with both internal and external partners, and ensuring the user stories entering the scrum process maintain the highest quality.Key responsibilities include:Conducting requirement gathering and gap analysis;Creating high-level and detailed interface/specification documents;Modeling APIs and databases (both relational and NoSQL);Providing support to development and QA teams;Leading complex integration and customization initiatives.