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We are seeking motivated and talented professionals to join our highly skilled teams. As a Senior Back End Developer at Q&amp;R S.A., you will be responsible for designing, developing, and maintaining high-quality backend services for large-scale enterprise projects. You will collaborate with cross-functional teams (e.g., Front-End, BA-QA) and leverage modern development practices such as AI-driven automation to streamline workflows, enhance code quality, and deliver robust solutions efficiently.Key Responsibilities:<ul><li>Architect, develop, and maintain Java-based services using Spring Boot and related frameworks.</li><li>Implement scalable and modular solutions, including reusable libraries/modules for various business needs</li><li>Write clean, efficient, and secure code following best practices and organizational standards.</li><li>Enforce peer code reviews and pull request checks to ensure clean, maintainable, and secure code</li><li>Integrate with tools (e.g., SonarCube) for continuous code quality checks, monitoring technical debt, and identifying vulnerabilities</li><li>Collaborate on effective database strategies (e.g., Oracle, Postgres) for query optimization</li><li>Use database-specific analysis tools to refine queries, create indices, and ensure high performance</li><li>Manage schema changes following best practices to minimize downtime and maintain data integrity</li><li>Leverage AI tools to automate repetitive tasks (e.g., code generation, technical documentation)</li><li>Contribute to a growing knowledge base (e.g., Confluence), applying best practices where relevant</li><li>Implement unit tests (e.g., JUnit, Mockito) for critical workflows, adhering to TDD principles</li><li>Ensure smooth integration of automated tests in CI/CD pipelines to detect and resolve issues early</li><li>Support Front-End developers interested in expanding to Back-End skills, providing guidance and mentorship</li><li>Participate in daily stand-ups, retrospectives, and knowledge-sharing sessions to foster a collaborative environment</li><li>Coordinate product releases with internal teams, ensuring alignment with security and compliance standards</li><li>Troubleshoot and resolve technical issues promptly to maintain high system reliability</li></ul>Required Qualifications:<ul><li>Bachelors degree in Computer Science or a related field (or equivalent professional experience)</li><li>7+ years of work experience in backend development with Java (11, 17+) and Spring Boot (including Spring Data, Spring Security), SQL (Oracle or Postgres) with proven query optimization and indexing techniques, ORM frameworks (JPA/Hibernate), Testing frameworks (JUnit, Mockito), Build Tools (e.g., Maven) and Version Control (Git), Object-Oriented Design, Design Patterns, and robust API design</li></ul>Desired Qualifications:<ul><li>Masters degree in Computer Science or a related field</li><li>Familiarity with Azure, AWS, or Google Cloud for scalable application deployment</li><li>Experience with Kafka, RabbitMQ, or similar technologies</li><li>Understanding of securing deployments, endpoint security, and ACMS</li><li>Exposure to AI-driven documentation or code generation tools</li><li>Agile or Scrum for iterative development</li><li>Exposure to TRIZ for structured problem-solving</li><li>Basic familiarity with ReactJS (or other frameworks) is a plus for broader collaboration</li><li>Knowledge of Jenkins, Bitbucket Pipelines, or similar automation pipelines</li></ul>Personal Attributes:<ul><li>Analytical Mindset: Strong problem-solving abilities and attention to detail</li><li>Team Player: Excellent communication and collaboration skills, including mentoring junior developers</li><li>Proactive &amp; Organized: Ability to prioritize tasks and execute effectively under deadlines</li><li>Adaptability: Willingness to explore new technologies and approaches that improve overall project outcomes</li><li>Continuous Learner: Eagerness to leverage courses and certifications (including AI/LLM-focused) for professional growth</li></ul>What is there for you<ul><li>We want our people to be well compensated, so we offer an attractive salary package</li><li>Health is the most important asset, so we have you secured with a health insurance and compilation plan from day one</li><li>We are excited for challenges, so you are invited to take part in exciting, innovative projects that make a difference</li><li>We never stop learning and evolving! We encourage our people to follow the pace by providing them voucher for Training Courses, so that they adapt new tech skills and develop their soft skills</li><li>Most important, we work as a team, so we gather on a smaller and bigger occasions to celebrate good times together! Happy Fridays, bowling sessions, running events and everything that help us have fun and enjoy working to our team</li></ul>

Senior Backend Developer [BET_06]

UNIC Athens, the University of Nicosia's academic and research base in Greece, combining internationally ranked teaching with state-of-the-art facilities, is seeking a Senior Campus Sensor &amp; Systems Operations Engineer&nbsp;to join its team.This role owns the on-campus hardware layer that feeds our data and AI platforms: antennas, receivers, environmental stations, cameras, radars, timing systems, and the on-prem servers that tie them together. You’re the person who makes sure “the machines are alive” and the data keeps flowing.The work is hands-on, rooftop and rack-level, plus enough Linux and networking to keep a small sensor observatory running smoothly.&nbsp;Responsibilities:&nbsp;Keep a campus-scale sensor observatory onlineMonitor health of diverse sensors: RF receivers, satellite downlinks, short-range radars, optical/IR cameras, acoustic arrays, seismic/structural, weather, and air-quality stations.Diagnose issues across power, RF signal, network, and compute layers; coordinate timely fixes.Maintain inventories, diagrams, and simple runbooks for each subsystem.Operate on-prem compute and storage nodesMaintain a small fleet of Linux servers dedicated to signal processing, media ingest, and sensor fusion.Handle OS updates, basic security hardening, disk/CPU monitoring, and log rotation.Work with central platform engineers to ensure data lands in the right queues/buckets/streams.Manage power, networking, and timing for sensorsOversee PoE switches, rooftop cabinets, UPS feeds, and basic environmental monitoring.Ensure reliable fibre/copper connectivity between rooftop cabinets, comms rooms, and core network.Operate and monitor GNSS-based timing / reference equipment used for precise time-stamping.Support installation, maintenance, and calibrationPlan and execute sensor deployments and relocations (roof, mast, dish frame, façades) with facilities.Coordinate periodic calibrations (e.g. weather, air quality, structural/ground sensors) with vendors and internal teams.Enforce safe working practices for rooftop and equipment-room work.Act as the bridge between campus and platform teamsReport status of on-campus systems and upcoming maintenance windows.Help test new data feeds, firmware updates, and configuration changes before they go to production.Provide clear feedback on physical constraints and operational realities back to architects and data/AI teams.Additionally:Daily / weekly operational checks on key systems, with clear escalation when something drifts or fails.Set up and maintain monitoring dashboards and alerts (metrics, logs, basic traces) for sensors and compute.Script routine tasks in Bash/Python (health checks, log scrapes, simple data sanity checks).Coordinate with vendors and contractors for specialized repairs and installs.Maintain accurate documentation (rack layouts, IP plans, cabling runs, rooftop layouts, change logs).&nbsp;Qualifications:&nbsp;Education:<ul><li>A BSc in Computer Engineering, or Electrical Engineering or related field.</li></ul>&nbsp;Experience:4+ years in a systems / field / instrumentation / NOC / SRE-style role, working with real hardware (not just cloud).&nbsp;Required Skills:&nbsp;Solid Linux experience (Ubuntu or similar): networking, system services, storage, logging.Strong practical networking skills: VLANs, PoE switches, fibre vs copper, basic routing, VPNs.Hands-on experience with at least some of:Environmental or industrial sensors (weather, air quality, structural, seismic, etc.), orRF / broadcast / telecom equipment, orCCTV / video analytics / radar / acoustic sensing.Comfortable reading wiring diagrams, labelling cables, and keeping tidy racks/cabinets.Able to work safely on rooftops and with facilities teams; familiarity with basic electrical and lightning/surge safety.Clear written documentation skills and enough English to collaborate with remote engineering teams.&nbsp;Additional Skills:&nbsp;Experience running or supporting a small observatory, lab, broadcast site, or similar multi-sensor facility.Exposure to GNSS timing, NTP/PTP, or other time-synchronization systems.Familiarity with Prometheus/Grafana or similar monitoring stacks.Basic RF concepts (antennas, coax, gain/noise, filters) or environmental monitoring concepts (calibration, QA/QC).Greek language skills and prior work on a university or research campus.&nbsp;What success looks like:Within a few weeks, you know every major sensor, cabinet, and server by name and location.Within a few months, outages are rare, short, and well-understood, with clear runbooks and monitoring in place.The data and AI teams treat the campus observatory as a reliable “black box” they can build on, because you keep it that way.

Senior Campus Sensor & Systems Operations Engineer - UNIC Athens

Junior Penetration Tester What Impact will you make?&nbsp;#YourOpportunity&nbsp;Do you thrive at solving complex challenges? Want to work on next-generation, cutting-edge products and services that deliver outstanding value? Work with other experts in your field? Work for a world-class organization that provides exceptional career experience and an inclusive and collaborative culture? Want to make an impact that matters? Consider joining Deloitte.We are currently seeking for enthusiastic team players with exceptional penetration testing skills and a well-rounded personality to become part of our dynamic&nbsp;Cyber - Offensive Security&nbsp;team. The team is part of a global network, where brilliant colleagues collaborate across Deloitte locations, to deliver services to our clients both in Greece and abroad.As a Junior&nbsp;Penetration Tester, you will work in a highly skilled team to perform various Penetration Testing and Red Teaming engagements for our domestic and international clients. Using your offensive skills, you will covertly breach our clients’ networks and provide recommendations to strengthen the client’s security posture. To sharpen your skills, you will be trained with the Offensive Security trainings; you will join the periodic Deloitte Global Ethical Hacking and Red Team knowledge exchange sessions, and perform research on the latest techniques and tools. Moreover, you will serve as a “Subject Matter Expert”, adding interpretive value to findings presented and be responsible for creating and executing custom penetration testing engagements to identify if client systems are vulnerable to security issues.&nbsp;#YourRole Your role as a Junior&nbsp;Penetration Tester&nbsp;will enable you to work alongside fellow Ethical Hackers, who are incredibly passionate about what they do and are characterized by their commitment to working as a team, and their ever-present customer focus. In this role, you will actively participate in technical planning and the delivery of best-in-class service to our clients. In this role, you will find yourself in a personal learning and development fast track and will be given many opportunities to get exposure and make an impact that matters. During your tenure as a Junior&nbsp;Penetration Tester,&nbsp;you will be able to:<ul><li>Receive training and attain certifications in the use of cutting-edge cybersecurity products but also on various cybersecurity engineering topics.</li><li>Be part of a truly global community of Deloitte experts in Ethical Hacking and Cyber Security.</li><li>Work on projects focused on identifying security vulnerabilities on client’s infrastructure, Web and Mobile Apps etc.</li><li>Find creative ways to obtain a foothold in a client's network.</li><li>Apply an adversary mindset to simulate sophisticated actors and achieve project-specific objectives.</li><li>Perform research and develop your own tools and sharpen your tradecraft.</li><li>Share your research within the Deloitte Global Hacking and Red Team community.</li><li>Turning security weaknesses into tailored and concrete recommendations.</li><li>Share knowledge and experiences to support the development of peers.</li><li>Monitor your own results against objectives and seek feedback to identify ways to improve personal and team performance.</li></ul> #WinningRequirements To qualify for the role, you must have:<ul><li>Bachelor’s Degree in Information Technology, Information Systems Security, Cybersecurity or any related discipline</li><li>Familiar with penetration testing like Web Application, Mobile, Infrastructure and Vulnerability Assessments both on *nix and Windows environments.</li><li>Expertise using Kali Linux and tools like Burp, Metasploit, Covenant, Cobalt Strike, and Nessus.</li><li>Willingness to research new security testing techniques and tradecraft.</li><li>Experience effectively prioritizing workload to meet deadlines and work objectives.</li><li>Demonstrated ability to write clearly, succinctly, and in a manner that appeals to a wide audience.</li><li>Consultant mindset, commitment to teamwork, and ability to build strong client relationships.</li><li>Strong communication skills in Greek and English.</li><li>Ability to maintain professionalism and always strive for high ethical standards.</li><li>Military obligations fulfilled where applicable</li></ul> Ideally:<ul><li>Burp Suite Certified Practitioner (BSCP) -&nbsp;PortSwigger</li><li>Hack the Box level: Pro Hacker and above</li></ul>&nbsp;#ChooseDeloitteif:<ul><li>You want to work with inspiring, ambitious, and supportive people with diverse geographical and academic backgrounds and extensive skills.</li><li>You get excitement in managing clients shifting priorities and accomplish tasks in a challenging, fast-paced environment.</li><li>You like to nurture people and share your knowledge with others.</li></ul>&nbsp;#AboutDeloitte Our servicesDeloitte offers Global professional services that include Audit, Risk Advisory, Tax, Consulting and Financial Advisory. Our approach combines insight and innovation from multiple disciplines with global business and industry expertise to help our clients excel anywhere in the world.We deliver outstanding impact on the reputation and success of our clients, in Greece and globally. In pursuing this we contribute to a sustainable and prosperous society, and are firm believers in the positive impact business can and should have on the world it operates within.&nbsp;Our PurposeOur purpose, “To make an impact that matters for our clients, our people and society “- defines who we are and what we stand for. This is not about size, it's about being the first choice. The first choice for the largest and most influential clients, and the first choice for the best talent.&nbsp;Our valuesAt Deloitte we foster a collaborative culture where talented individuals can produce their best work. We value innovative thinking, diverse insights and a genuinely distinctive level of customer service. We value difference, with respect at the heart of our inclusive culture, and we support agile working arrangements.&nbsp;Our talent experienceFrom day one at our firm, practitioners are part of a community. Our development and career progression framework will help them develop the skills and capabilities to succeed. The wellness of our people and the ability to offer agile working arrangements is at the centre of our unique talent experience. We create a workplace that encourages collaboration, creativity, inclusiveness to ensure our staff are supported, encouraged, and feel a sense of purpose and meaning in what they do each day.&nbsp;Sounds like the sort of role for you? Apply now.&nbsp;This document has been prepared by Deloitte Business Solutions Societe Anonyme of Business Consultants, Deloitte Certified Public Accountants Societe Anonyme and Deloitte Alexander Competence Center Single Member Societe Anonyme of Business Consultants.Deloitte Business Solutions Societe Anonyme of Business Consultants, a Greek company, registered in Greece with registered number 000665201000 and its registered office at Marousi Attica, 3a Fragkokklisias &amp; Granikou str., 151 25, Deloitte Certified Public Accountants Societe Anonyme, a Greek company, registered in Greece with registered number 0001223601000 and its registered office at Marousi, Attica, 3a Fragkokklisias &amp; Granikou str., 151 25 and Deloitte Alexander Competence Center Single Member Societe Anonyme of Business Consultants, a Greek company, registered in Greece with registered number 144724504000 and its registered office at Thessaloniki, Municipality of Pylaia - Chortiatis of Thessaloniki, Vepe Technopolis Thessaloniki (5th and 3rd street), are one of the Deloitte Central Mediterranean S.r.l. (“DCM”) countries. DCM, a company limited by guarantee registered in Italy with registered number 09599600963 and its registered office at Via Tortona no. 25, 20144, Milan, Italy is one of the Deloitte NSE LLP geographies. Deloitte NSE LLP is a UK limited liability partnership and member firm of Deloitte Touche Tohmatsu Limited, a UK private company limited by guarantee.Deloitte refers to one or more of Deloitte Touche Tohmatsu Limited (“DTTL”), its global network of member firms and their related entities (collectively, the “Deloitte organization”). DTTL (also referred to as “Deloitte Global”) and each of its member firms and related entities are legally separate and independent entities, which cannot obligate or bind each other in respect of third parties. DTTL and each DTTL member firm and related entity is liable only for its own acts and omissions, and not those of any of each other. DTTL does not provide services to clients. Please see www.deloitte.com/ about to learn more.DTTL, Deloitte NSE LLP and Deloitte Central Mediterranean S.r.l. do not provide services to clients. Please see www.deloitte.com/about to learn more about our global network of member firms.Deloitte is a leading global provider of audit and assurance, consulting, financial advisory, risk advisory, tax and related services. Our global network of member firms and related entities in more than 150 countries and territories serves four out of five Fortune Global 500ℜg; companies. Learn how Deloitte’s approximately 312,000 people make an impact that matters at www.deloitte.com.This communication contains general information only, and Deloitte Business Solutions Societe Anonyme of Business Consultants, Deloitte Certified Public Accountants Societe Anonyme and Deloitte Alexander Competence Center Single Member Societe Anonyme of Business Consultants, is not, by means of this communication, rendering professional advice or services. Before making any decision or taking any action that may affect your finances or your business, you should consult a qualified professional adviser. No entity in the Deloitte organization shall be responsible for any loss whatsoever sustained by any person who relies on this communication. Deloitte organization refers to Deloitte Touche Tohmatsu Limited (“DTTL”), its global network of member firms and their related entities collectively.© 2024&nbsp;For more information contact Deloitte Central Mediterranean.

Junior Penetration Tester

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senior backend developer [bet_06]

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senior campus sensor & systems operations engineer - unic athens

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