Junior HPC System Administrator

At GRNET S.A., we are dedicated to bridging the digital divide by providing top-tier Internet connectivity and e-Infrastructures to the Greek Educational, Academic, and Research community. Our mission is to facilitate equal participation in the global Society of Knowledge, serving sectors such as Education, Research, Health, and Culture.We are currently seeking a talented Java Developer to join our innovative team. In this role, you will be instrumental in designing and implementing solutions that expand our service portfolio, which features scalable and modular offerings for big data analytics (e.g. ARGO Monitoring Service) and Identity Management (e.g. RCIAM).As part of our team, you will contribute to the development of services for the European eInfrastructures, including the European Open Science Cloud (EOSC), and support the European research and education community.You will collaborate with a group of highly skilled engineers committed to delivering critical services while ensuring optimal availability, performance, and security. Our team thrives on innovation, automation, and the pursuit of excellence, providing substantial value to GRNET and its users.

Join GRNET, Greece's premier provider of networking and cloud computing solutions for academic and research institutions, as well as public and private sectors. We are at the forefront of advancing digital transformation initiatives across Greece, promoting cutting-edge technologies and applications that enhance educational and research capabilities. Our mission is to empower users in key sectors including Public Administration, Education, Research, Health, and Culture through innovative computing and network services.As the National Research and Education Network (NREN) of Greece, GRNET is dedicated to fostering collaboration with other digital service providers in the public sector, sharing best practices and expertise in advanced information systems. Our team plays an integral role in the national research and technological community within the European Union’s Research Infrastructures.We are seeking talented Network Reliability Engineers to join our NRE team, which is responsible for delivering robust Internet services, VPNs, and Cloud Networking Infrastructure. This role involves designing, developing, and maintaining resilient, scalable services based on Free and Open Source software while nurturing a strong DevOps culture within our organization.Key Responsibilities:Modernizing Data Center Networking Infrastructure and services.Providing Internet Feed and VPN services through access, Carrier MPLS, and Core Network.Developing and maintaining a Network Automation/Orchestration platform.Implementing Network Telemetry Infrastructure.Creating a DDoS detection and mitigation pipeline.Offering multi-tenant firewalling services.Overseeing the administration and operation of the Greek Internet Exchange (GR-IX).Responding to incidents related to network failures and service disruptions.Tools Utilized:Network Configuration and Automation Platform: NornirNetwork Orchestration: StackstormResource Databases: Netbox, IXP ManagerMonitoring: SNMP, Streaming Telemetry

About UsAgile Actors is a dynamic tech company dedicated to enhancing and empowering technical teams for both international and local clients. Our distinct combination of coaching, ongoing education, and innovative practices fosters an environment where professionals not only contribute, but also thrive.When you join Agile Actors, you become part of diverse, agile teams working on cutting-edge solutions. Our talented professionals collaborate with global leaders in their fields, such as Austrian Post, Red Hat, and Swissquote, among others.We believe that work is more than a job; it should be a space where individuals flourish. Our recognition as a Great Place to Work 2026 underscores our commitment to nurturing an environment where talent, passion, and growth can prosper.Our Core ValuesPurpose-drivenAdventurous spiritAgilityRespect and EmpowermentAuthenticity and TrustEvolving alongside our clientsWho We’re Looking ForWe seek passionate tech professionals who possess a strong sense of purpose, curiosity, and a desire to make a genuine impact. If you view challenges as opportunities and thrive in collaborative environments, you will find your place with us.At Agile Actors, you will embrace adventure and adaptability, ready to implement innovative ideas in a fast-paced context. You will join one of our local teams in Athens, working alongside talented clients to deliver impactful solutions that shape the future of technology. As you engage with projects from global leaders, you will continuously evolve in a supportive environment built on trust, respect, and empowerment.

Role Overview Avis Greece is looking for a Seasonal Parking Agent in Athens. This role focuses on preparing vehicles for delivery and inspecting them when they return from rental. Main Responsibilities Prepare vehicles and check additional equipment such as GPS units and Wi-Fi devices before handing them over to customers. Inspect the condition of vehicles and any rented equipment when customers return them. Complete reservations by finalizing contracts in the system and recording any necessary damage compensation. Monitor and maintain the parking area to ensure it stays organized and safe. Provide helpful and attentive customer service throughout the process.

About Avis Greece Avis Greece is part of a global brand focused on reshaping how people move. The company develops integrated products and services that aim to make travel more flexible and convenient for customers worldwide. Why Work at Avis Greece? Supportive team culture: Colleagues work together to encourage new ideas and keep customer needs at the center of every decision. Purpose-driven work: Employees help shape the future of mobility, contributing to a more connected world. Rental Sales Agent – Athens Downtown The Athens Downtown team is looking for a Rental Sales Agent who will deliver excellent service, drive sales, and make the rental process smooth for every customer. Main Responsibilities Deliver friendly, reliable customer service for each car rental and build long-term relationships with clients. Promote relevant products and services to improve the customer experience. Monitor competitor offerings and market trends to help maintain competitive rates in line with company guidelines. Support daily station operations and suggest improvements for better results. Work with other departments to resolve customer issues and ensure high service standards. Location Athens, Attica, Greece

Join Avis: Where Your Career Finds Purpose and We Redefine Mobility At Avis, we are revolutionizing the way people travel, spearheading transformation in the global mobility sector. Our mission is to innovate and deliver integrated products and services that create an array of new travel possibilities, defined by exceptional convenience and flexibility.Why Choose Avis: A Collaborative Work Environment: At Avis, we are more than just a business; we are a community that cherishes its employees. We take great pride in fostering a collaborative atmosphere, focused on innovation, and prioritizing customer satisfaction in every action we take. Your Career, Your Purpose: By joining us, you'll find that Avis is the place where your career can truly thrive. We are not merely offering jobs; we are inviting exceptional talent to contribute to our vision of a more connected world. Unlock Your Potential as a Rental Sales Agent with Avis Greece Avis Greece is searching for an outstanding Rental Sales Agent to join our team at the Athens Airport Station. This role is pivotal in delivering extraordinary customer service, driving sales, and ensuring an effortless rental experience for our clients. Your Key Responsibilities: Provide exemplary customer service for every car rental, building trust and fostering long-term client relationships. Promote additional products and services to elevate the overall customer experience. Remain knowledgeable about competitor offerings and market trends to ensure our deals are competitive and aligned with company policies. Contribute actively to the operations of the station, suggesting enhancements to improve performance. Monitor and address customer complaints in collaboration with relevant departments to guarantee outstanding service.

IKH is a premier Software and Robotics Solutions provider making significant strides in the global market. Over the past few years, our team has expanded by over 80%, leading us to relocate to a modern, spacious office. As we embark on 2025, we're excited to introduce several innovative projects focused on digital transformation, custom software development, and robotics.We are currently seeking a talented Senior Java Software Engineer with a robust technical background and extensive experience to tackle challenging outsourced projects.In this position, you will not only develop complex project tasks but also supervise the development efforts of junior developers. You will analyze functional requirements and decompose tasks for team assignment.To thrive as a Senior Software Developer, you should possess profound knowledge of Java technologies and exhibit strong leadership capabilities. Exceptional communication skills are essential as you will collaborate with clients and various development teams.Your Daily Responsibilities:Design, develop, and maintain the back-end of large-scale web-based Java EE/Spring applications.Engage in technical analysis, documentation, implementation, and integration.Test and manage early support for core software tools and assets developed during software projects.Translate requirements into functional specifications.Employ BDD (Behaviour-Driven Development) methodology in coding and software implementation.Align solutions with client needs, particularly in collaboration with the architecture team.Execute integrations with other applications and developed modules.Provide assistance with deployment and configuration management.

The TeamOpenBet stands as a premier global provider in the betting and gaming entertainment industry, partnered with over 200 clients to craft unforgettable winning moments for millions of players globally. From managing bets during landmark events such as the FIFA World Cup and the Super Bowl to developing innovative products like BetBuilder, we are committed to enhancing the player experience with top-tier content, state-of-the-art technology, and robust player protection mechanisms.For more than 25 years, our unparalleled platform has fueled the most prominent betting brands, maintaining optimal performance with 100% uptime, unmatched scalability, and rapid response times. With 85 licenses and a clientele that includes 20 operators from the World Lottery Association, our team of over 1,200 experts across 14 countries remains at the forefront of the industry. Join OpenBet and elevate your career by being part of a dynamic global team that is shaping the future of betting entertainment for millions.The GoalAs a Senior Software Engineer at OpenBet, you will gain exposure to vital systems, along with comprehensive training and mentorship to advance both our software and your professional growth.Your Responsibilities:Develop new features and functionalities for high-transaction, large-scale betting platforms and systems;Lead design and code reviews;Identify and resolve performance bottlenecks in the software;Design modular, scalable, and portable solutions; spearhead enhancements to system architecture;Mentor, guide, and potentially manage junior software engineers;Collaborate with customer stakeholders to communicate complex technical concepts.Your Profile:A bachelor’s degree in computer science, engineering, or information systems from a recognized institution;Proven programming proficiency in Java;Strong foundational programming skills (data structures, algorithms);Experience in database design and optimization (any vendor);Familiarity with web technologies and internet protocols (SOAP, WS-*, ReST, XML, HTTP, TCP/IP);Exceptional communication skills, both written and verbal;6+ years of professional software development experience.Preferred Skills and Experiences:Experience in Linux development;Proficiency in TCL;Web development experience with React, HTML, HTML5, and CSS;Knowledge of Agile methodologies, Scrum, BDD, TDD;Experience with Jenkins or other CI tools;Good understanding of Git or other version control systems;Scripting knowledge in Bash, Perl, Python, and JavaScript;Experience developing software that integrates with third-party systems;Background in software development for high-availability environments.

Role Overview Intralot is seeking a Senior Software Engineer with strong Java expertise to help build and improve software for gaming and lottery systems. This role focuses on designing and developing solutions that support the company's products and services. What You Will Do Develop and maintain Java-based applications for gaming and lottery platforms. Collaborate with team members to solve technical challenges and deliver new features. Contribute to the architecture and design of scalable, reliable systems. Location This position is based in Athens, Attikí, Greece.

Join GRNET S.A., where we are dedicated to bridging the digital divide and facilitating equal opportunity for the Greek educational, academic, and research communities. Our mission is to enhance connectivity and provide exceptional e-infrastructures and advanced services across various sectors, including Education, Research, Health, and Culture.We are seeking a driven and enthusiastic DevOps Engineer to design, implement, and deliver advanced operational support for our cloud-based services, encompassing server management, virtualization, and storage solutions. In this role, you'll be pivotal in monitoring the implementation of a cutting-edge cloud-enabled application ecosystem in an AWS environment. You will collaborate closely with project contractors to ensure seamless deployment, prepare detailed technical reports, and communicate effectively about areas requiring enhancements. After the project handover, you will independently manage and maintain the ecosystem to ensure its optimal operation.

GRNET S.A. is dedicated to bridging the digital divide by providing robust Internet connectivity, superior e-Infrastructures, and advanced services tailored for the Greek Educational, Academic, and Research community. Our mission is to foster equal access to knowledge and resources, empowering our members to fully participate in the global Society of Knowledge. We proudly serve sectors including Education, Research, Health, and Culture. Anticipating the arrival of the DAEDALUS supercomputer in early 2026, which will rank among the top 30 fastest supercomputers globally, we are excited to support the Greek AI factory – Pharos – by facilitating demanding AI and data-intensive workflows.We are actively seeking a driven HPC User Support Specialist to enhance our team and deliver exceptional support to researchers, engineers, and scientific users utilizing national HPC resources.As an HPC User Support Specialist, your contributions will be pivotal in empowering the scientific community to harness the full potential of HPC systems. Your role will encompass managing user inquiries, troubleshooting job submissions and workflows, offering guidance to newcomers, and aiding in the development of training materials and documentation.Join our talented team, known for its strong technical expertise and unwavering commitment to innovation, service excellence, and the continuous enhancement of GRNET’s HPC offerings.

Antenna is seeking an IT Business Analyst to support its operations in Athens, Greece. This position connects technology teams and business stakeholders, helping ensure IT solutions support the company’s strategic objectives. Role overview The IT Business Analyst gathers requirements from multiple stakeholders, reviews current business processes, and identifies ways to improve efficiency through technology. The role involves translating business needs into clear technical specifications. Key responsibilities Work with stakeholders to collect and document business requirements Analyze existing processes and identify areas for improvement Propose solutions that support operational goals and efficiency Location This role is based in Athens, Attica, Greece.

Join a prominent player in the education technology sector, recognized globally as a leader in assessment and certification of professional skills, operating in over 200 countries. This is your opportunity to apply now! PeopleCert is on the lookout for a skilled Software Developer to become a vital part of our Software Development Team. Your role will involve designing and developing applications that facilitate the management of our certification exams, available 24/7 around the globe. Our applications are web-based, utilizing cloud (Azure) services, and incorporate various technologies, including JavaScript, Redis, OAuth, .NET, SQL Server, alongside iOS and Android native app development and video streaming.As a Software Developer, your responsibilities will encompass:Software Development and Maintenance: Engage actively in all stages of the software development lifecycle for our products. Write high-quality, testable, and efficient code with advanced tools, ensuring thorough documentation in accordance with PeopleCert standards.Project Collaboration: Involve yourself in project planning and design. Track ongoing project progress and provide daily updates on task statuses to both management and project management teams using Wrike.Quality Assurance: Execute unit testing and initial debugging to ensure functionality. Work closely with the Software Quality Assurance team to report findings and enhance software quality.Technological Innovation: Investigate innovative technologies, tools, and solutions, sharing knowledge with the team to cultivate a culture of innovation.Team Collaboration and Communication: Cooperate effectively within a team environment, communicating efficiently with colleagues to achieve the best results.Policy Adherence: Implement all procedures, policies, and work instructions as per the PeopleCert Integrated Management System.Cultural Alignment: Embody the company’s core values of Quality, Passion, Integrity, and Innovation in all professional activities.What we seek:Educational Background: A University Degree in Informatics Technology or a related field is required. A Postgraduate Degree is preferred.Professional Experience: A minimum of 2 years of experience in software development, with a proven track record in a project leadership role.Technical Proficiency: Strong expertise in Object-Oriented Programming, along with advanced skills in ASP.NET, C#, and JavaScript. A deep comprehension of frameworks and design patterns is essential.Exposure in Agile Environments: Experience working within Agile development frameworks.

Join the prestigious Conrad Athens The Ilisian, the latest luxury hotel that redefines Athenian hospitality. Nestled in the heart of Athens, this hotel promises an extraordinary experience amidst the city's rich cultural and historical tapestry.As the Chief Accountant, you will take charge of our accounting team, ensuring the meticulous management of financial reporting processes and the integrity of financial data. In this pivotal position, you will oversee all financial operations, guaranteeing precise reporting and adherence to regulations. Your accounting expertise will be instrumental in enhancing the hotel's financial performance and supporting the success of our operations. Key ResponsibilitiesLead daily activities within the accounting department, including general ledger management, bookkeeping, and financial reporting.Prepare, review, and analyze financial statements in compliance with company policies and relevant accounting standards (e.g., GAAP or IFRS).Monitor organizational financial performance through effective budgeting, forecasting, and variance analysis to aid in strategic planning.Ensure timely completion of monthly, quarterly, and annual financial closing processes.Oversee the preparation and submission of tax returns, ensuring compliance with local, state, and national tax laws.Develop and maintain robust internal controls to secure hotel assets and uphold financial integrity.Collaborate with department heads and senior management to provide actionable financial insights that support data-driven decision-making.

Join Cross Border Talents as a Swedish Customer Advisor in the vibrant city of Athens, Greece! Since 2014, we have been tackling the Digital Skills Shortage with innovative global recruitment strategies and cutting-edge algorithms. Our mission is to bridge talented individuals with leading employers in stunning cities, enhancing the quality of life for our candidates. Our commitment to excellence has earned us 3 prestigious seals from the European Commission, highlighting the impact of our vision. With over 1000 job openings every month in 10 EU countries, we invite you to be part of our success story!Are you eager to gain professional experience while enjoying the breathtaking city of Athens, rich in culture and history? Picture yourself unwinding with surfing lessons after work!Utilize your language and tech skills in a dynamic environment! Join a top-tier BPO in Athens, where your role as a customer support agent involves delivering exceptional service to customers while collaborating with renowned global brands.Your Role as a Customer Advisor:Represent a prestigious global brand.Thrive in a multicultural setting.Cultivate customer relationships to deliver outstanding experiences.Utilize open-ended questions and support documents to troubleshoot effectively.Provide solutions to common inquiries and challenges.

About UsAt Speakitjobs, we take pride in being Greece’s pioneering recruitment agency that embraces a 4-day workweek. In our inaugural year at the Great Place to Work® Hellas Awards, we achieved remarkable recognition: #2 Best Workplace™ Hellas 2025 (20–49 employees) #1 Best Workplace™ for Women™ Hellas 2025 (20–49 employees)These accolades highlight our dedication to a people-centric approach and our commitment to fostering growth and purpose. About the RoleAs an HR Generalist, you will play a key role in our people operations, overseeing the entire employee lifecycle and ensuring efficient HR processes in recruitment, engagement, and compliance.Key Responsibilities Manage the complete recruitment cycle and collaborate with hiring managers for final selections. Work closely with hiring managers to identify team needs and facilitate a seamless recruitment experience. Oversee HR administration, including maintaining employee records and managing annual leave. Assist with performance evaluations and feedback processes. Plan and coordinate internal events and employee engagement initiatives. Provide guidance to employees on HR policies and address inquiries. Coordinate compensation and benefits processes alongside management. Ensure adherence to local labor laws and organizational policies. Participate in the continuous enhancement of HR practices. Requirements 2–4 years of experience in HR or people operations. Hands-on experience with candidate screening and interviewing. Solid understanding of HR processes including leave management, evaluations, and policy adherence. Good comprehension of labor law and HR compliance. Excellent communication and organizational abilities. Fluent in English. Proactive mindset with strong problem-solving skills. Benefits Competitive remuneration package. Extra private medical insurance. Company laptop and mobile device. Mobile plan. Hybrid working model (2 days at home, 3 days in the office). Additional 2 days off annually. Early Friday leave during summer months. Excellent internal career opportunities.

Join our dynamic team at Nynn as a Barista, where your passion for coffee meets exceptional service. As a Barista, you will be responsible for crafting high-quality beverages, creating a welcoming atmosphere, and providing outstanding customer service. We value creativity and dedication, and we are looking for someone who can bring their unique flair to our café.

Are you eager to embark on a career with a pioneering education technology leader, recognized globally for its expertise in the assessment and certification of professional skills across over 200 countries? If this sounds like an exciting opportunity, we invite you to apply now! PeopleCert is seeking a dedicated Trainee Lawyer to enhance its dynamic international in-house Legal team. In this role, you will support various business functions across multiple legal disciplines, including corporate, commercial, IT, intellectual property, and employment law. Your contributions will be vital in ensuring compliance with relevant laws, regulations, and internal policies, while actively participating in the reduction of legal risks within the organization.Collaborating closely with seasoned legal professionals and diverse stakeholders, you will gain valuable experience and contribute to initiatives that reflect PeopleCert’s core values: Quality, Innovation, Passion, Integrity, Clarity, and Velocity.As a Trainee Lawyer, your responsibilities will include:Conducting comprehensive legal research on legislation, regulatory frameworks, and case law, and preparing well-organized summaries for the legal team.Reviewing, drafting, editing, proofreading, and translating a variety of legal documents and agreements.Supporting trial preparations by drafting legal correspondence and managing filings with courts, authorities, and public bodies.Tracking and managing assigned tasks and deadlines to ensure timely project delivery.Creating reports, presentations, and other materials using various office tools.Assisting in presenting legal updates, contributing to due diligence processes, and supporting the development of internal policies and procedures.Providing advice on legal, regulatory, and ethical considerations related to AI systems, including data protection, automated decision-making, and risk classification.

At Skroutz, our mission is to deliver an extraordinary shopping experience to our customers. Since our inception in 2005, we have upheld the belief that satisfied customers lead to satisfied merchants, driving us to anticipate and meet their needs with an unparalleled, seamless experience.Our vision is to become the Everyday App—the primary destination for millions seeking to fulfill their online shopping needs. Whether it’s purchasing a new smartphone, stocking up on pantry essentials, finding the ideal outfit for an event, or searching for that rare gaming console, Skroutz is your trusted partner for effortless shopping.Our ambitions stretch beyond Greece, as we aim to become one of Europe’s fastest-growing marketplaces, with exciting expansions currently underway in Cyprus and the Balkans. Our unwavering commitment to customer satisfaction guides every decision we make.We are looking for passionate individuals who share our love for e-commerce and technology. If you are motivated to create remarkable shopping experiences and help sellers grow their businesses globally, we want you on our team.Join Skroutz and be part of a transformative journey that is redefining online shopping. Together, let’s turn everyday moments into extraordinary experiences.Are you ready to take on this challenge?#AimToAmazeOur Engineering ValuesMaster Your Craft. Continuously develop your skills and take pride in your work.Embrace Feedback. Deliver prototypes early and use feedback to refine your work.Collaborate. Support your teammates, listen actively, and take the initiative.Avoid Over-Engineering. Simplify your solutions without compromising quality.Enjoy Your Work. Celebrate accomplishments and foster a positive work environment.Technologies We UtilizeOur tech stack includes Ruby for the backend (Ruby on Rails framework), with JavaScript (ES6), React/Redux for the frontend, and a MariaDB cluster for storage. We extensively use Elasticsearch, Kafka, MongoDB, Redis, and Memcached. Jenkins supports our CI processes, while tools like Sentry, NewRelic, and Grafana assist with monitoring. We prioritize selecting the best tools available to meet our needs. Read more about our projects on our Engineering Blog.