Data Scientist Jobs in Sofia.
All active Data Scientist roles based in Sofia.
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Senior Data Scientist
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MariaDB is making a big impact on the world. Whether you’re checking your bank account, buying a coffee, shopping online, making a phone call, listening to music, taking out a loan or ordering takeout – MariaDB is the backbone of applications used everyday. Companies small and large, including 75% of the Fortune 500, run MariaDB, touching the lives of billions of people. With massive reach through Linux distributions, enterprise deployments and public clouds, MariaDB is uniquely positioned as the leading database for modern application development.
About the Role
We're hiring a Senior Data Scientist with strong programming skills, a deep command of analytical methods, and the ability to turn complex data into clear business insights. You'll join a small, highly skilled team where your work has a direct impact on how the business operates and makes decisions.
This is a hands-on, high-autonomy role. You'll work across the full data stack-writing sophisticated SQL in BigQuery and MariaDB, building automation and tooling in Python, and leveraging AI-powered tools like Windsurf, Gemini, and Claude to work faster and smarter. You'll be expected to understand how data is structured end-to-end, from source systems through to the warehouse, and to know which analytical approach fits which business question.
You'll also be a key communicator-translating complex data into clear narratives for stakeholders across the organization. We need someone who can operate independently, manage their own priorities, and continuously raise the bar on what's possible with our data. If you have a genuine passion for analytics, a GitHub full of projects, and you're the kind of person who's always learning the next thing-we'd love to hear from you.
Key Responsibilities
- Apply the right analytical methods-statistical analysis, regression, clustering, forecasting, classification-to solve real business problems at scale
- Design and build end-to-end analytical solutions-from data extraction in BigQuery and MariaDB to actionable insights and automated reporting
- Develop and maintain data pipelines, analytical frameworks, and tooling using Python and SQL
- Use AI-powered development tools (Windsurf, Gemini, Claude, Cursor) to accelerate experimentation, code generation, and analysis
- Leverage the latest AI features and tools (LLMs, embeddings, generative AI) to augment and automate analytical workflows
- Build lightweight applications and APIs (FastAPI) to put models and insights into the hands of stakeholders
- Own the data architecture decisions within your domain-schema design, data modeling, and pipeline reliability
- Communicate results, trade-offs, and recommendations clearly to both technical and business audiences
- Map and improve business processes through data-driven analysis and process design
Requirements & Qualifications
- 7+ years of professional experience in data science, advanced analytics, or a quantitative field
- Expert-level SQL - deep fluency in BigQuery and MariaDB or similar data platforms; you understand query optimization, partitioning, and data modeling
- Strong Python and/or JavaScript skills - production-quality code, not just notebooks; experience with modern data and ML libraries
- Deep understanding of analytical methods - regression, clustering, time series, A/B testing, classification; you know when to apply what and why
- Solid understanding of data architecture - how warehouses, lakes, and pipelines are designed; how to structure data for both analytical and ML workloads
- Proficiency with AI-powered development tools - Windsurf, Gemini, Claude, Cursor, or similar; you leverage AI assistants as a core part of your workflow
- Excellent communication skills - you present complex technical work in a way that drives decisions
- Self-managing and self-sufficient - you set your own priorities, unblock yourself, and deliver without hand-holding
- Relentlessly curious and ambitious - you're always learning, always building, always improving
- A public GitHub profile showcasing your projects, experiments, or contributions
Nice to Have
- Experience with Next.js or modern frontend frameworks for building data-facing applications
- FastAPI experience for serving models or internal tooling
- Background in business process analysis or operational process design
- Experience working across multiple business departments (Finance, Marketing, Sales, Operations, Engineering) - broad organizational exposure is a big plus
- Experience with JSON-based data formats, APIs, and integration patterns
- Understanding of Docker and Kubernetes - containerization and cluster orchestration experience is a big plus
Benefits & Culture
- Globally distributed team environment
- Remote or hybrid work options (location-dependent)
- Challenging projects with company-wide impact
- Competitive compensation, 25 days paid annual leave, plus holidays
- A culture that values curiosity, clean engineering, and people who genuinely love what they do
Location – Romania (remote)
Travel – Flexible for adhoc travel
What's in it for you?
Impact the world of technology by pushing the boundaries of technology and business models, working at MariaDB, plc. Be part of a game-changing organization that encourages outside-the-box thinking, values empowerment, and is truly shaping the future of the software industry.
You’ll be collaborating with high-caliber colleagues around the world, offering unparalleled learning and growth opportunities. We provide a very competitive compensation package, 25 days paid annual leave (plus holidays) and a massive degree of flexibility and freedom, and more.
Salaries for candidates outside the U.S. will vary based on local compensation structures.
How to Apply
If you are interested in this position, please submit your application along with your CV/Resume through our ATS Greenhouse on our MariaDB Careers site.
- At MariaDB we celebrate the diverse experiences and perspectives of our employees because this drives innovation and success. MariaDB is an equal opportunity employer dedicated to creating a welcoming and inclusive workplace for everyone.
- MariaDB does not sponsor work visas or relocation.
- MariaDB is committed to providing accommodations for individuals with disabilities within our application and interview process. To request an accommodation due to a disability, please inform your recruiter.
- MariaDB will not accept agency resumes without a prior contractual agreement with HR. Please do not forward resumes to any recruiting alias or employee directly. MariaDB is not responsible for paying any fees associated with any unsolicited submitted CV/Resumes.
Ready to apply?
Apply to MariaDB plc
Senior Data Scientist
Share this job
MariaDB is making a big impact on the world. Whether you’re checking your bank account, buying a coffee, shopping online, making a phone call, listening to music, taking out a loan or ordering takeout – MariaDB is the backbone of applications used everyday. Companies small and large, including 75% of the Fortune 500, run MariaDB, touching the lives of billions of people. With massive reach through Linux distributions, enterprise deployments and public clouds, MariaDB is uniquely positioned as the leading database for modern application development.
About the Role
We're hiring a Senior Data Scientist with strong programming skills, a deep command of analytical methods, and the ability to turn complex data into clear business insights. You'll join a small, highly skilled team where your work has a direct impact on how the business operates and makes decisions.
This is a hands-on, high-autonomy role. You'll work across the full data stack-writing sophisticated SQL in BigQuery and MariaDB, building automation and tooling in Python, and leveraging AI-powered tools like Windsurf, Gemini, and Claude to work faster and smarter. You'll be expected to understand how data is structured end-to-end, from source systems through to the warehouse, and to know which analytical approach fits which business question.
You'll also be a key communicator-translating complex data into clear narratives for stakeholders across the organization. We need someone who can operate independently, manage their own priorities, and continuously raise the bar on what's possible with our data. If you have a genuine passion for analytics, a GitHub full of projects, and you're the kind of person who's always learning the next thing-we'd love to hear from you.
Key Responsibilities
- Apply the right analytical methods-statistical analysis, regression, clustering, forecasting, classification-to solve real business problems at scale
- Design and build end-to-end analytical solutions-from data extraction in BigQuery and MariaDB to actionable insights and automated reporting
- Develop and maintain data pipelines, analytical frameworks, and tooling using Python and SQL
- Use AI-powered development tools (Windsurf, Gemini, Claude, Cursor) to accelerate experimentation, code generation, and analysis
- Leverage the latest AI features and tools (LLMs, embeddings, generative AI) to augment and automate analytical workflows
- Build lightweight applications and APIs (FastAPI) to put models and insights into the hands of stakeholders
- Own the data architecture decisions within your domain-schema design, data modeling, and pipeline reliability
- Communicate results, trade-offs, and recommendations clearly to both technical and business audiences
- Map and improve business processes through data-driven analysis and process design
Requirements & Qualifications
- 7+ years of professional experience in data science, advanced analytics, or a quantitative field
- Expert-level SQL - deep fluency in BigQuery and MariaDB or similar data platforms; you understand query optimization, partitioning, and data modeling
- Strong Python and/or JavaScript skills - production-quality code, not just notebooks; experience with modern data and ML libraries
- Deep understanding of analytical methods - regression, clustering, time series, A/B testing, classification; you know when to apply what and why
- Solid understanding of data architecture - how warehouses, lakes, and pipelines are designed; how to structure data for both analytical and ML workloads
- Proficiency with AI-powered development tools - Windsurf, Gemini, Claude, Cursor, or similar; you leverage AI assistants as a core part of your workflow
- Excellent communication skills - you present complex technical work in a way that drives decisions
- Self-managing and self-sufficient - you set your own priorities, unblock yourself, and deliver without hand-holding
- Relentlessly curious and ambitious - you're always learning, always building, always improving
- A public GitHub profile showcasing your projects, experiments, or contributions
Nice to Have
- Experience with Next.js or modern frontend frameworks for building data-facing applications
- FastAPI experience for serving models or internal tooling
- Background in business process analysis or operational process design
- Experience working across multiple business departments (Finance, Marketing, Sales, Operations, Engineering) - broad organizational exposure is a big plus
- Experience with JSON-based data formats, APIs, and integration patterns
- Understanding of Docker and Kubernetes - containerization and cluster orchestration experience is a big plus
Benefits & Culture
- Globally distributed team environment
- Remote or hybrid work options (location-dependent)
- Challenging projects with company-wide impact
- Competitive compensation, 25 days paid annual leave, plus holidays
- A culture that values curiosity, clean engineering, and people who genuinely love what they do
Location – India (remote)
Travel – Flexible for adhoc travel
What's in it for you?
Impact the world of technology by pushing the boundaries of technology and business models, working at MariaDB, plc. Be part of a game-changing organization that encourages outside-the-box thinking, values empowerment, and is truly shaping the future of the software industry.
You’ll be collaborating with high-caliber colleagues around the world, offering unparalleled learning and growth opportunities. We provide a very competitive compensation package, 25 days paid annual leave (plus holidays) and a massive degree of flexibility and freedom, and more.
Salaries for candidates outside the U.S. will vary based on local compensation structures.
How to Apply
If you are interested in this position, please submit your application along with your CV/Resume through our ATS Greenhouse on our MariaDB Careers site.
- At MariaDB we celebrate the diverse experiences and perspectives of our employees because this drives innovation and success. MariaDB is an equal opportunity employer dedicated to creating a welcoming and inclusive workplace for everyone.
- MariaDB does not sponsor work visas or relocation.
- MariaDB is committed to providing accommodations for individuals with disabilities within our application and interview process. To request an accommodation due to a disability, please inform your recruiter.
- MariaDB will not accept agency resumes without a prior contractual agreement with HR. Please do not forward resumes to any recruiting alias or employee directly. MariaDB is not responsible for paying any fees associated with any unsolicited submitted CV/Resumes.
Ready to apply?
Apply to MariaDB plc
Senior Data Scientist
Share this job
MariaDB is making a big impact on the world. Whether you’re checking your bank account, buying a coffee, shopping online, making a phone call, listening to music, taking out a loan or ordering takeout – MariaDB is the backbone of applications used everyday. Companies small and large, including 75% of the Fortune 500, run MariaDB, touching the lives of billions of people. With massive reach through Linux distributions, enterprise deployments and public clouds, MariaDB is uniquely positioned as the leading database for modern application development.
About the Role
We're hiring a Senior Data Scientist with strong programming skills, a deep command of analytical methods, and the ability to turn complex data into clear business insights. You'll join a small, highly skilled team where your work has a direct impact on how the business operates and makes decisions.
This is a hands-on, high-autonomy role. You'll work across the full data stack-writing sophisticated SQL in BigQuery and MariaDB, building automation and tooling in Python, and leveraging AI-powered tools like Windsurf, Gemini, and Claude to work faster and smarter. You'll be expected to understand how data is structured end-to-end, from source systems through to the warehouse, and to know which analytical approach fits which business question.
You'll also be a key communicator-translating complex data into clear narratives for stakeholders across the organization. We need someone who can operate independently, manage their own priorities, and continuously raise the bar on what's possible with our data. If you have a genuine passion for analytics, a GitHub full of projects, and you're the kind of person who's always learning the next thing-we'd love to hear from you.
Key Responsibilities
- Apply the right analytical methods-statistical analysis, regression, clustering, forecasting, classification-to solve real business problems at scale
- Design and build end-to-end analytical solutions-from data extraction in BigQuery and MariaDB to actionable insights and automated reporting
- Develop and maintain data pipelines, analytical frameworks, and tooling using Python and SQL
- Use AI-powered development tools (Windsurf, Gemini, Claude, Cursor) to accelerate experimentation, code generation, and analysis
- Leverage the latest AI features and tools (LLMs, embeddings, generative AI) to augment and automate analytical workflows
- Build lightweight applications and APIs (FastAPI) to put models and insights into the hands of stakeholders
- Own the data architecture decisions within your domain-schema design, data modeling, and pipeline reliability
- Communicate results, trade-offs, and recommendations clearly to both technical and business audiences
- Map and improve business processes through data-driven analysis and process design
Requirements & Qualifications
- 7+ years of professional experience in data science, advanced analytics, or a quantitative field
- Expert-level SQL - deep fluency in BigQuery and MariaDB or similar data platforms; you understand query optimization, partitioning, and data modeling
- Strong Python and/or JavaScript skills - production-quality code, not just notebooks; experience with modern data and ML libraries
- Deep understanding of analytical methods - regression, clustering, time series, A/B testing, classification; you know when to apply what and why
- Solid understanding of data architecture - how warehouses, lakes, and pipelines are designed; how to structure data for both analytical and ML workloads
- Proficiency with AI-powered development tools - Windsurf, Gemini, Claude, Cursor, or similar; you leverage AI assistants as a core part of your workflow
- Excellent communication skills - you present complex technical work in a way that drives decisions
- Self-managing and self-sufficient - you set your own priorities, unblock yourself, and deliver without hand-holding
- Relentlessly curious and ambitious - you're always learning, always building, always improving
- A public GitHub profile showcasing your projects, experiments, or contributions
Nice to Have
- Experience with Next.js or modern frontend frameworks for building data-facing applications
- FastAPI experience for serving models or internal tooling
- Background in business process analysis or operational process design
- Experience working across multiple business departments (Finance, Marketing, Sales, Operations, Engineering) - broad organizational exposure is a big plus
- Experience with JSON-based data formats, APIs, and integration patterns
- Understanding of Docker and Kubernetes - containerization and cluster orchestration experience is a big plus
Benefits & Culture
- Globally distributed team environment
- Remote or hybrid work options (location-dependent)
- Challenging projects with company-wide impact
- Competitive compensation, 25 days paid annual leave, plus holidays
- A culture that values curiosity, clean engineering, and people who genuinely love what they do
Location – Bulgaria (remote)
Travel – Flexible for adhoc travel
What's in it for you?
Impact the world of technology by pushing the boundaries of technology and business models, working at MariaDB, plc. Be part of a game-changing organization that encourages outside-the-box thinking, values empowerment, and is truly shaping the future of the software industry.
You’ll be collaborating with high-caliber colleagues around the world, offering unparalleled learning and growth opportunities. We provide a very competitive compensation package, 25 days paid annual leave (plus holidays) and a massive degree of flexibility and freedom, and more.
Salaries for candidates outside the U.S. will vary based on local compensation structures.
How to Apply
If you are interested in this position, please submit your application along with your CV/Resume through our ATS Greenhouse on our MariaDB Careers site.
- At MariaDB we celebrate the diverse experiences and perspectives of our employees because this drives innovation and success. MariaDB is an equal opportunity employer dedicated to creating a welcoming and inclusive workplace for everyone.
- MariaDB does not sponsor work visas or relocation.
- MariaDB is committed to providing accommodations for individuals with disabilities within our application and interview process. To request an accommodation due to a disability, please inform your recruiter.
- MariaDB will not accept agency resumes without a prior contractual agreement with HR. Please do not forward resumes to any recruiting alias or employee directly. MariaDB is not responsible for paying any fees associated with any unsolicited submitted CV/Resumes.
Ready to apply?
Apply to MariaDB plc
Why us?
Insurify is one of the America’s fastest-growing MIT FinTech startups and has been recognized as one of Inc. 5,000’s fastest-growing private companies in America in 2025, 2024, 2023, 2022 and 2021, Forbes Fintech 50 List for 2023, 2022, and 2021, Forbes Next Billion Dollar Startups of 2022 global and Top 100 InsurTech company. We’re changing the way millions of people compare, buy and manage insurance with artificial intelligence, technology, and superior product design.
Our company vision is to be recognized as the preeminent and most trusted digital agent for insurance comparison, purchase, and management. Our team is critical to achieving our vision and fostering the right culture is essential to our team’s success.
How you will make an impact
- Partner closely with the Marketing team to assist in the development of more sophisticated bidding and targeting methodologies across Paid Search, Retargeting, and Email campaigns
- Develop models and algorithms to personalise the ranking of results in the product
- Identify opportunities, propose experiments and develop models to improve customer conversions
What you need to succeed
- 4+ years of relevant experience
- Experience with building and using machine learning models with clear business impact
- Strong skills and experience in Python (numpy, pandas, sklearn, etc) and SQL
- Quick learning ability and a drive suitable for the startup hustle
- As an early member of a small team, emphasise on interactive approach to delivering data products
- Experience with clarifying a business problem, identify and implement good solution
- Curiosity about data, outliers, using data to propose and confirm causes and effects
- Strong quantitative and programming skills with a product-driven sensibility
- Graduate Degree in technical/quantitative disciplines
- Fluent spoken and written use of English language
Benefits
- 25 days annual leave
- Enhanced private medical, dental and vision insurance plans
- Yearly wellbeing budget or Multisport card
- Personal budget for learning and books
- Office kitchen and fun area with snacks and beverages
- Regular social events
- Friendly office culture
- Hybrid office
Ready to apply?
Apply to Insurify