Principal Android Mobile Engineer (Wallet & Digital Identity Platforms)

This role is open to candidates based anywhere in Greece.

The Role:

You will join a team working with cutting-edge technologies and striving to utilise cloud services to the maximum. Your role will be to provide the necessary infrastructure using Terraform, develop CI/CD pipelines in GitLab or Jenkins, and create automations to support the development teams. Additionally, you will ensure that the underlying infrastructure runs smoothly, and the systems and tools work as expected. You'll be responsible for helping developers with troubleshooting and providing consultation in case of alerts.

The main responsibilities of the position include:

• Collaborate with the development teams to plan, deploy and administer applications running on AWS and Kubernetes
• Maintain the AWS infrastructure using Infrastructure as Code principles and Terraform
• Initiate and drive the adoption of technologies and use of good patterns for development and operations
• Manage specific technical domains or projects, ensuring architectural consistency, scalability, and alignment with business objectives
• Improve engineering processes and practices, identifying opportunities for automation, optimization, and enhanced system reliability
• Implement cloud migration projects
• Communicate to the senior leadership, the cloud migration projects progress
• Preserve business continuity 24/7 with minimum downtime and financial impact
• Investigate and perform regular assessments of cloud deployments in compliance with the company’s standards and best practices
• Ensure the Company’s deployment standards and pillars are followed in cloud solutions and resources
• Stay up to date with the latest tools and trends in the industry

Main requirements:

• BSc/MSc in Computer Science, or a similar discipline
• 2+ years of relevant experience
• Overall knowledge of solution design and deployment projects
• Experience with Docker
• Experience in or knowledge of CI/CD with GitLab and/or Jenkins
• Experience in AWS technologies, services and ecosystem
• Experience with Kubernetes
• Knowledge of Infrastructure as Code (IaC) concepts and tools, preferably Terraform
• Experience with versioning tools such as Git
• Organisation and documentation skills
• Excellent time management skills
• Essential Linux and Windows admin, networking and scripting skills

Benefit from:

• Attractive remuneration package plus performance-based reward
• Private health insurance
• Corporate pension fund
• Intellectually stimulating work environment
• Continuous personal development and international training opportunities

The Hiring Experience: What Awaits You

• Show Your Skills – Online Technical Challenge
• Let’s Connect – Intro Chat with Talent Acquisition
• Deep Dive – First Interview with Your Future Team
• Final Connection – Final Interview

All applications will be treated with strict confidentiality!

About Sthenos AI

Sthenos AI
is the AI developer of
EFA Group
, building intelligent, mission-ready solutions for defense and aerospace. With deep expertise in Command-and-Control (C2), cyber defense, computer vision, and autonomous systems, we design and deploy secure, field-proven AI that enhances operational efficiency and situational awareness. As part of a leading European defense ecosystem, we bring scalable innovation where it matters most - in the theater of operations. Internally, we are building a unified operations platform: a single system through which the entire company will run its daily work, with AI woven through every workflow. We have validated the concept with a working prototype and are now assembling a small senior team to build the production platform properly, from the ground up.

The Role

We are hiring a
Senior Frontend Engineer
to build the interface for our internal platform: the workspace where the entire company will do its daily work. You will own the front end architecture, build our design system, and turn complex operational workflows into interfaces people actually enjoy using.

This is a greenfield build with an unusual scope: one platform, many domains, designed for AI-native workflows from day one. You will be one of the first engineering hires, with real influence over architecture, tooling, and engineering culture. The prototype exists to learn from, not to maintain.

What You Will Do

• Architect and build the platform front end in React and TypeScript from the ground up
• Create and maintain a design system and component library used across all platform modules
• Build complex, data-heavy interfaces: dashboards, tables with filtering and bulk actions, multi-step forms, approval flows, and document views
• Build AI-native UI patterns: chat and assistant interfaces, streaming responses, inline AI suggestions
• Own front end state management, data fetching, and caching strategy against the platform APIs
• Ensure quality across the board: accessibility, responsiveness, performance, and cross-browser support
• Set up front end tooling, testing, and CI standards
• Work directly with the back end engineer on API contracts and with stakeholders on UX for their workflows

What We Are Looking For

• 5+ years of front end engineering experience in React
• Strong TypeScript and modern React (hooks, suspense, server-state libraries such as TanStack Query)
• Proven experience building large, data-dense business applications, not only marketing sites or simple SPAs
• Experience building or significantly contributing to a design system or shared component library
• Solid grasp of front end architecture: state management, routing, code splitting, performance profiling
• Good product and UX instincts; able to work from rough requirements without a full-time designer
• Comfortable in a small team: pragmatic, self-directed, strong written communication

Nice to Have

• Experience with AI product interfaces (chat UIs, streaming, optimistic updates)
• Experience with data visualization libraries
• Familiarity with Python back ends and API co-design
• Basic design skills (Figma) or close collaboration experience with designers
• Experience with internal tools, ERP, or B2B SaaS products

Your Competencies

• Strong analytical and problem-solving skills with a sharp eye for usability
• Ability to work independently while collaborating effectively within a small team
• Passion for AI-driven products and for crafting interfaces people enjoy using
• Structured and detail-oriented way of working: consistency, accessibility, and polish matter to you
• Pragmatic mindset: prefers simple, maintainable solutions over clever ones
• Openness to feedback and continuous improvement
• Good communication skills; comfortable discussing UX and technical trade-offs with stakeholders
• Fluent in English, both written and spoken

At EY, we’re all in to shape your future with confidence.

We’ll help you succeed in a globally connected powerhouse of diverse teams and take your career wherever you want it to go.

Being part of EY in Greece means being part of a continuously growing team, which has been announced as
Top Employer
for the fourth consecutive year, certified as a
Great Place to Work
for the third year in a row, and awarded as
Best Workplace in Professional Services & Consulting
for the second consecutive time, for our
almost 3,000 professionals
!

At EY, we’ll develop you with
future-focused skills
and equip you with
world-class experiences
through coaching and training programs as well as the use of
advanced technology and AI
. We’ll fuel you and your extraordinary talents in a
diverse and inclusive culture
of globally connected teams

Join us as we commemorate 100 years of EY in Greece this year. Experience great flexibility under our
hybrid operating model
across our offices in Athens, Patras, Thessaloniki and Crete and contribute to
building a better working world
.

The opportunity
We are looking for a Microsoft Security Engineer with strong experience across the Microsoft 365 and Microsoft Security ecosystem, focusing primarily on Microsoft Defender and Microsoft Purview.

Your Key Responsibilities
Design, implement, and optimize Microsoft Defender solutions, including:

• Defender for Endpoint
• Defender for Office 365
• Defender for Identity
• Defender for Cloud

Implement and manage Microsoft Purview capabilities:

• Information Protection / Sensitivity Labeling
• Data Loss Prevention (DLP) across Microsoft 365 workloads

Define and enforce security policies across:

• Exchange Online
• SharePoint Online
• OneDrive
• Microsoft Teams

Participate in security assessments, hardening activities, and compliance initiatives

Collaborate with IT, Cloud, and Identity teams to deliver end‑to‑end security solutions

Produce clear technical documentation for architecture, configurations, and security decisions

Skills And Attributes For Success
To qualify for the role you must have:

• Bachelor’s degree in computer science, Engineering, IT, Mathematics or related field, or equivalent work experience.
• Strong hands‑on experience with Microsoft Defender (Microsoft 365 Defender stack)
• Strong analytical/problem-solving skills and the ability to communicate clearly with technical and non-technical stakeholders.

Ideally, you will also have:
Proven experience with:

• Microsoft Purview Information Protection (Sensitivity Labels)
• Microsoft Purview DLP
• Solid understanding of the Microsoft 365 security model
• Experience in security policy design and implementation
• Good knowledge of Microsoft Entra ID (Azure AD) from a security perspective
• Ability to translate business requirements into effective technical security controls
• High‑level understanding of what Sentinel is, what it does, and when it is used is sufficient
• Considered a plus
• Microsoft certifications (e.g. SC‑200, SC‑300, SC‑400, MS‑500)
• Experience in hybrid (on‑prem & cloud) environments

What We Offer You
Ability to Shape your Future with Confidence by:

• Developing your professional growth:

• You'll have unlimited access to educational platforms, EY Badges and EY Degrees, alongside support for certifications. You will experience personalized coaching and feedback, and gain exposure to international projects, through our expansive global network, empowering you to define and achieve your own success.

• Dive into our innovative GenAI ecosystem, designed to enhance your EY journey and support your career growth. These advanced AI tools will empower you to focus on higher-value work and meaningful interactions, enriching your professional experience like never before.

• Empowering your personal fulfilment: We focus on your financial, social, mental and physical wellbeing.

• Our competitive rewards package, depending on your experience, includes cutting-edge technological equipment, ticket restaurant vouchers, a private health and life insurance scheme, income protection and an exclusive EY benefits club card that provides a wide range of discounts, offers and promotions.
• Our flexible working arrangement (hybrid model) is defined based on your own preferences and team’s needs, and we enjoy various getaways such as short Fridays, Flex Day and Together Day.
• Our commitment to a sustainable way of operating, encourages volunteerism, promotes sustainable practices and offers opportunities for you to create a positive societal impact.
• Our pride lies in working at EY as one of the most recognized employers in Greece through our multiple awards received over the last 4 years (Top Employer, Great Place to Work and Best Workplace in Professional Services & Consulting).
• Fueling an inclusive culture: We prioritize a diverse, equitable and inclusive environment, where you’ll be embraced for who you are and empowered to use your voice to help others find theirs.

Are you ready to shape your future with confidence? Apply today.

To help create an equitable and inclusive experience during the recruitment process, please inform us as soon as possible about any disability-related adjustments or accommodations you may need.

EY
| Building a better working world

EY is building a better working world by creating new value for clients, people, society and the planet, while building trust in capital markets.

Enabled by data, AI and advanced technology, EY teams help clients shape the future with confidence and develop answers for the most pressing issues of today and tomorrow.

EY teams work across a full spectrum of services in assurance, consulting, tax, strategy and transactions. Fueled by sector insights, a globally connected, multi-disciplinary network and diverse ecosystem partners, EY teams can provide services in more than 150 countries and territories.

#CX10854@

We are Kaizen Gaming
Kaizen Gaming, the team powering Betano, is one of the biggest GameTech companies in the world, operating in 20 markets. We always aim to leverage cutting-edge technology, providing the best experience to our millions of customers who trust us for their entertainment.

We are a diverse team of more than 2.700 Kaizeners, from 40+ nationalities spreading across 3 continents.

Our #oneteam is proud to be among the Best Workplaces in Europe and certified Great Place to Work across our offices. Here, there’ll be no average day for you. Ready to Press Play on Potential?

Let's start with the role
You will join an autonomous Agile team and work closely with the Product Owner, Technology Lead Data Scientist and AI engineers to create a competitive advantage for Kaizen and offer a unique online experience to our customers.

As an
AI Senior Software Engineer in Test
, you will utilize your experience and technical expertise to make your mark in the quality of the products and experiences we offer our customers. Relish the opportunity to contribute in this key role where you will liaise with our talented AI team and business and domain experts. Your understanding of the testing lifecycle will enable you to liaise seamlessly with a broad cross-section of colleagues, product owners and stakeholders, and provide a vote of confidence regarding the quality of the product.

You will help us evaluate and improve with insights the quality of our personalized recommendations by moving away beyond traditional API testing. Rather than simply verifying whether an API returns results, you will help determine whether it returns the best possible results for our customers at a given moment. This is not a traditional Software Engineer in Test role. You will act as the voice of our customers, providing meaningful quality feedback that helps improve our AI and GenAI products and models.

As a Senior Software Engineer in Test you will:

• Review user stories and acceptance criteria in order to develop effective test plans and both manual and automated tests cases in collaboration with the AI team;
• Design complex automation solutions regarding functional and non functional testing;
• Apply your deep knowledge of testing strategies and demonstrate the ability to contribute in all levels of the testing pyramid;
• Take ownership of the Software Testing Life Cycle (STLC) for new features on testing suites, taking technical ownership to ensure timely and quality delivery;
• Research test tools, methodologies, and trends and upgrade existing practices and processes;
• Use both automated and manual testing to help us evaluate and improve the quality of our personalized recommendations and responses provided by our AI and GenAI products and models;
• Lead efforts alongside our AI teams to evaluate non-deterministic conversational GenAI products and AI models

What you'll bring
We are looking for a
Senior Software Engineer in Test
who is a team player with a can-do attitude and excellent communication skills.

• Bachelor's or Master's degree in Computer Science/Software Engineering or an IT-related discipline;
• 5+ years of experience as a Senior Software Engineer in Test (this is just an indication, your actual skills matter the most);
• Hands-on and strong experience in at least one programming language, preferably Python;
• Strong knowledge of software QA methodologies, tools and processes;
• Hands-on experience with web browser automation tools such as Selenium or Playwright;
• Good understanding of all levels of the testing pyramid;
• Experience in defect tracking and test management tools such as JIRA, X-Ray etc
• Experience working closely with product teams to understand requirements and verify/validate they are met;
• Passion for continuous learning, curiosity about how things work and interest in providing quality feedback to improve customer experiences;
• Excellent written and verbal communication skills in English;
• General understanding of GenAI and AI technologies;
• Demonstrated AI-first mindset, actively leveraging AI tools and assistants to improve productivity, problem-solving and decision-making. Continuously explores new AI capabilities and champions their practical adoption within teams, using AI as a natural part of day-to-day work rather than a supplementary tool
• Experience testing and evaluating non-deterministic conversational GenAI products using LLMs-as-a-judge for example and AI models (Nice to Have)
• Prior experience with iGaming (nice to have)

Kaizen Gaming Perks

• 🕑 Hybrid way of working;
• 🏃 A buddy will support you with your onboarding;
• 💸 Competitive pay & bonus scheme;
• ⭐Developmental 360° feedback framework;
• 💰 Monthly meal allowance;
• 👩‍⚕️ Private health insurance for you and your family;
• 📚 Unlimited access to Udemy & continuous training;
• 👨‍👩‍👧‍👦 Family Support.

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We are an equal opportunity employer committed to fostering a diverse and inclusive workplace. We welcome applications from individuals of all backgrounds, regardless of race, gender, religion, sexual orientation,or age.