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Senior Data Scientist, Fintech

Optasia
Remote friendly (Athens Attica Greece)
Worldwide

Optasia is a fully enabled B2B2X financial technology platform covering scoring, financial decisioning, disbursement and collection. We are committed to enabling financial inclusion for all. We are changing the world our way.

We are seeking for enthusiastic professionals, with energy, who are results driven and have can-do attitude, who want to be part of a team of likeminded individuals who are delivering solutions in an innovative and exciting environment.

The Senior Data Scientist joins the AI department within the Data & Risk team, which is responsible for Data Management and Credit Risk optimization. The core responsibilities of the role are to design and deliver advanced AI models and methods that support core risk and business decisioning across Optasia’s products. The ideal candidate is outcome-focused, highly driven and able to perform effectively in fast-moving and demanding environments. The position involves close collaboration with Credit Traders, Quantitative Risk Data Scientists and a range of Business stakeholders.

Responsibilities:

  • Design, develop and optimize advanced machine learning and statistical models that support risk management, pricing and decision-making processes.
  • Lead end-to-end model development initiatives, from problem definition and solution design to production deployment and ongoing monitoring.
  • Design algorithmic solutions that support performance and revenue optimization across Optasia’s products.
  • Develop and evolve model frameworks, methodologies and best practices within the AI team.
  • Work on complex financial products and large-scale decision-making systems, supporting real-time model use cases.
  • Identify, evaluate and validate key model drivers and assumptions using large and complex datasets.
  • Collaborate closely with quantitative risk experts, traders, data engineers and machine learning infrastructure engineers within the Data & Risk department.
  • Ensure model robustness, explainability and alignment with internal governance and risk standards.
  • Act as a technical reference point, clearly communicating model behavior, assumptions and trade-offs to business and senior stakeholders.

 Required Experience & Qualifications:

  • Master’s degree or PhD in Data Science, Statistics, Mathematics, Finance, Computer Science or a related quantitative field.
  • 6–7+ years of experience in Data Science, Machine Learning or quantitative risk analysis, preferably in financial services.
  • Strong expertise in advanced machine learning, statistical modeling and optimization techniques.
  • Advanced understanding of credit risk modeling, validation methodologies and portfolio analytics.
  • Strong coding skills in Python & SQL and experience working with large-scale data environments.
  • Proven ability to design and implement production-grade AI models.
  • Excellent analytical, problem-solving and decision-making skills.
  • Ability to operate effectively under pressure in dynamic, real-time environments.
  • Excellent communication skills, with the ability to clearly articulate complex concepts and assumptions.
  • Strong judgment and critical thinking skills.
  • Self-motivated, proactive and highly accountable.
  • Strong collaboration and stakeholder management skills.
  • Creative and solution-oriented mindset

Why you should apply
What we offer:
👟 Flexible hybrid working
💸 Competitive remuneration package
🏝 Extra day off on your birthday
💰 Performance-based bonus scheme
👩🏽‍⚕️ Comprehensive private healthcare insurance
📲 💻 All the tech gear you need to work smart

Optasia’s Perks:
🎌 Be a part of a multicultural working environment
🎯 Meet a very unique and promising business and industry
🌌 🌠 Gain insights for tomorrow market’s foreground
🎓 A solid career path within our working family is ready for you
📚 Continuous training and access to online training platforms
🥳 CSR activities and festive events within any possible occasion
🍜 Enjoy comfortable open space restaurant with varied meal options every day
🎾 🧘‍Wellbeing activities access such as free on-site yoga classes, plus available squash court on our premises

Optasia’s Values 🌟

#1 Drive to Thrive: Fully dedicated to evolving. We welcome all challenges and learning opportunities.
#2 Customer-First Mindset: We go above and beyond to meet our partners’ and clients’ expectations.
#3 Bridge the Gap: Knowledge is shared, information is exchanged and every opinion counts.
#4 Go-Getter Spirit: We are results oriented. We identify any shortcomings that hold us back and step up to do what’s needed.
#5 Together we will do it: We are committed to supporting one another and to understanding and respecting different perspectives, as we aim to reach our common goals.