About us

Katarzyna Budkowska

Founder & CEO | Certified Chief Accountant

Katarzyna is the founder of EPSILON and the person from whom it all began. She is a certified Chief Accountant with many years of experience in accounting, taxation, and comprehensive business support. Holding the Polish Ministry of Finance certificate authorizing the provision of professional accounting services, she has built the foundation of the firm on knowledge, expertise, and practical experience gained over the years.

She manages the company with full commitment and dedication, ensuring the highest standards of client service. Katarzyna excels both in the strategic development of the business and in the day-to-day support of clients and team members. As a leader, she is not afraid of challenges, makes confident decisions, and consistently seeks the best solutions, even in the most complex business, tax, and organizational matters.

One of her greatest strengths is the ability to combine professionalism, expertise, and experience with a genuine openness to people. To her clients, she is not only an advisor but often a trusted business partner who helps them make important decisions and safely grow their businesses. For her team, she is a mentor, a source of support, and someone they can always turn to with any challenge—not only accounting-related.

Katarzyna is constantly seeking new solutions, tools, and opportunities to improve efficiency and service quality. She firmly believes that growth, innovation, and strong organization are the foundations of outstanding client service. For this reason, she continuously invests in the development of the firm, the implementation of modern technologies, and the improvement of internal processes that enhance both efficiency and the overall experience of clients and employees.

In her work, she follows one simple principle: quality is always more important than quantity. She combines accuracy, reliability, and responsibility with positive energy, optimism, and a natural ability to build lasting relationships. Through this approach, she has created a workplace where professionalism goes hand in hand with partnership, mutual respect, and a friendly atmosphere.

Both professionally and personally, Katarzyna is a dynamic, entrepreneurial, and action-oriented individual. She believes there are no problems without solutions—only challenges that require the right approach. It is this determination, combined with her experience and genuine care for both clients and team members, that has allowed her to build EPSILON into a trusted brand relied upon by entrepreneurs for many years.

Aleksandra Sosińska

Chief Accountant | Team Coordinator

Aleksandra is a specialist in providing comprehensive accounting services for commercial companies. Her trademarks are professionalism, perfectionism, and extensive experience gained through years of working with entrepreneurs from a wide range of industries. She excels not only in day-to-day accounting matters but also in handling the most complex and demanding cases that many would consider challenging.

She never accepts “I don’t know” as an answer. Whenever a problem arises, she consistently seeks the most effective solution. Highly goal-oriented, ambitious, and committed, Aleksandra treats every new challenge as an opportunity for growth and professional development. Thanks to her analytical mindset and exceptional attention to detail, she is able to successfully coordinate even the most complex accounting processes.

In addition to serving clients, Aleksandra also acts as a team coordinator. Managing people, organizing workflows, and building efficient processes are areas in which she truly excels. She is committed to maintaining the highest quality of service, supporting team members in their daily responsibilities, and ensuring that all tasks are completed accurately and on time.

Aleksandra values order, consistency, and strong organization both in her professional and personal life. Planning, setting clear objectives, and successfully achieving them come naturally to her. Despite the high level of responsibility and numerous duties she manages every day, she remains energetic, positive, and approachable. Her optimism, communication skills, and openness enable her to build excellent relationships with both clients and colleagues, making her a highly valued member of the EPSILON team.

Agata Foks

Senior Accountant

Agata specializes in providing accounting services to commercial companies and sole proprietorships. In her work, she combines diligence, professionalism, and an ambitious approach to every task entrusted to her. Her greatest satisfaction comes from a job well done and from knowing that clients can always rely on her trustworthy support, regardless of the situation.

She is known for her excellent organizational skills, punctuality, and exceptional attention to detail. Whenever she encounters a new program, system, or online platform, she takes the time to understand it thoroughly, developing her own structured and efficient workflows that allow her to work accurately and effectively. Agata never leaves a question unanswered – whenever a new challenge or issue arises, she is determined to fully understand it and find the most appropriate solution.

She continuously develops her professional skills and expands her knowledge of accounting and taxation, which she successfully applies while serving both small businesses and larger corporate entities. Thanks to her analytical mindset, commitment, and attention to detail, she quickly adapts even to the most demanding accounting matters.

Outside of work, Agata is passionate about the automotive world, beautiful cars, and dynamic driving. The energy, determination, and enthusiasm that accompany her in her private life are equally evident in her daily professional responsibilities.

Martyna Bąk

HR & Payroll Specialist | Accountant

Martyna is responsible for the comprehensive HR and payroll services of our clients, while also providing accounting support to both commercial companies and sole proprietorships. Thanks to her versatile skill set, she successfully combines HR, payroll, and accounting expertise, offering clients a truly comprehensive approach to business support.

She is a person full of energy, positivity, and enthusiasm. Cheerful, witty, and naturally optimistic, Martyna brings a great atmosphere to the team and has a unique ability to ease even the most stressful situations. Her openness and excellent communication skills make working with clients a genuine pleasure, and she effortlessly builds strong and lasting professional relationships.

Martyna is a true “jack of all trades.” Curious about the world and eager to expand her knowledge, she is interested in many different fields and is always willing to learn something new. There are no topics she considers unworthy of exploration and no questions she is unwilling to investigate. This curiosity and versatility allow her to excel in a wide range of areas, from accounting and payroll matters to everyday support for entrepreneurs.

Her dedication, confidence, and willingness to help are among the qualities that distinguish her professionally. She always finds time to listen to clients and colleagues, working together with them to identify the best possible solution. Martyna is also an invaluable support to the entire team, coordinating various ongoing matters, helping to organize workflows, and ensuring smooth communication and information flow within the office.

She applies her knowledge and experience to the service of both small businesses and companies operating under full accounting regulations. Through her professionalism, strong communication skills, and positive attitude, she builds long-term relationships with clients who appreciate her availability, practical support, and partnership-oriented approach to cooperation.

Izabela Bartkowska

HR, Payroll & Health and Safety Specialist

For many years, Izabela has specialized in comprehensive HR and payroll services as well as occupational health and safety (OHS) matters. She possesses extensive knowledge of labor law, social insurance regulations, and employer obligations, enabling her to effectively support clients in managing their most valuable asset – their people.

Her broad professional experience allows her to handle even the most complex employee-related matters with confidence and ease. Social Insurance Institution (ZUS) procedures hold no secrets for her. Whether a case involves employee benefits, registrations, document corrections, or inspections, Izabela is always able to find the right solution and guide clients through the process in a calm, professional manner.

What distinguishes her professionally is her accuracy, responsibility, and personalized approach to every client. She focuses not only on meeting deadlines and ensuring compliance but also on helping business owners feel confident and secure in all areas related to HR and payroll administration. She willingly shares her expertise, offers practical support, and patiently explains even the most complex issues concerning employment regulations and employer responsibilities.

Izabela is an open-minded, approachable, and supportive professional who is always ready to assist both clients and colleagues. Her positive attitude, calm demeanor, and professionalism enable her to build long-lasting relationships based on trust, reliability, and mutual respect.

In her personal life, she is passionate about traveling and discovering new places. She has already explored many corners of the world, and each new journey provides her with fresh inspiration and energy. Regardless of the circumstances, she remains cheerful, optimistic, and full of positive energy, which she naturally shares with those around her.

Patrycja Orlikowska

Senior Accountant

A dedicated, hardworking, and highly conscientious professional who approaches her duties with meticulous care and the utmost professionalism. She stands out for her positive attitude and energy, which naturally spread to the entire team and foster a collaborative, friendly atmosphere.

Thorough and consistent, she is highly accountable and effectively manages the tasks entrusted to her. She treats every assignment with the utmost attention, ensuring high-quality results and strict adherence to deadlines.

On a daily basis, she provides comprehensive services to commercial law companies, including large corporate entities. Her work is defined by precision and meticulousness. She analyzes every document and entry in detail, quickly identifying any potential discrepancies.

She never shies away from a challenge, readily taking on demanding, complex cases that require exceptional organizational skills and a highly responsible approach. As a result, clients can rest assured that their affairs are managed reliably, with every detail under full control.

Beyond her professional expertise, she is approachable and genuinely kind. Her warm smile and positive energy ensure that working with her is not only highly effective but also a truly pleasant experience.

Mariia Stulii

Accounting Specialist for Commercial Companies

She supports the team in servicing commercial law companies, ensuring all tasks are executed accurately and on schedule. Pragmatic, highly organized, and goal-oriented, she effectively manages client matters and streamlines accounting processes.

Her work is characterized by remarkable diligence and an exceptional attention to detail—no piece of documentation ever goes unnoticed. Her precision and consistency guarantee a high level of security and reliability in all financial settlements.

Mariia is an expressive and confident professional, which translates into an efficient organization of her workflow and a decisive approach to her responsibilities. She adapts swiftly to new situations and responds effectively to clients’ needs.

At the same time, she radiates optimism and positive energy. Her natural openness and friendly demeanor bring a great atmosphere to the team, making collaboration with her not only seamless but also highly comfortable.

By combining professionalism, accuracy, and a positive mindset, Mariia provides invaluable support to both her colleagues and her clients.

Bohdana Prokaziuk

Accountant for Sole Proprietorships

A professional who perfectly combines reliability, accuracy, and exceptional client relationship skills. She specializes in servicing sole proprietorships and managing the accounts of entrepreneurs across various industries. She ensures that all financial settlements are handled on time, accurately, and in strict compliance with current regulations.

In her daily work, she stands out for her meticulous attention to detail—nothing escapes her notice. As a result, clients can be confident that their affairs are in perfect order. At the same time, she maintains a broader perspective on their finances, identifying factors that impact the company’s tax security and overall operations.

One of her greatest strengths is her excellent communication. She explains even the most complex accounting and tax issues in a clear and understandable way, making collaboration smooth and completely stress-free. Clients highly value her for her availability, dedication, and ability to build trust-based relationships.

She is also a true powerhouse of positive energy. She approaches every task with enthusiasm and commitment, which translates not only into high-quality work but also a fantastic collaborative atmosphere. Her openness, kindness, and warm smile make even the most demanding and complex issues feel much more manageable.

By combining professionalism with a highly personable approach, she provides invaluable support to her clients—serving not just as their accountant, but as a trusted partner in their day-to-day business operations.

Magdalena Mieszczańska

Senior Accountant

An experienced Senior Accountant specializing in commercial law companies. She is responsible for the comprehensive accounting of both large and small entities, ensuring that all financial records are accurate, timely, and fully compliant with current regulations.

In her work, she is distinguished by her immense diligence and dedication. She is eager to continuously develop her skills, staying up-to-date with the latest changes in tax and accounting laws to provide clients with the most current and secure solutions. Thanks to her extensive experience and precision, clients can feel completely confident and place their full trust in her financial management.

Extremely helpful and highly approachable, she has a knack for explaining even the most complex issues in a clear and understandable manner. Her proactive approach ensures that collaboration is always smooth and entirely stress-free.

She is a naturally easygoing professional, full of positive energy and a fantastic sense of humor. She brings a great atmosphere to the team, and her relaxed, friendly demeanor makes working with her not just highly effective, but genuinely enjoyable.

By combining her deep knowledge, professional experience, and natural openness, she serves as more than just an accountant. She is a true partner to her clients, supporting them in running their businesses securely and with complete peace of mind.

Joanna Ślusarska

HR & Payroll / NGO Accounting Specialist

A calm and level-headed professional whose work fosters a strong sense of stability and security, both within the team and in client relations. She perfectly combines reliability, responsibility, and excellent organizational skills, ensuring that all entrusted tasks are executed accurately and strictly on schedule.

She handles HR and payroll services, as well as comprehensive accounting for non-governmental organizations (NGOs), such as foundations and associations. She ensures that all financial and payroll settlements comply with current legal regulations and the unique operational nature of these entities.

In her daily routine, she is highly systematic, approaching every duty with the utmost care and diligence.

While she generally operates in a quiet and highly structured manner, she is fully capable of making firm, accurate decisions in situations that demand a swift response. Beyond her professional skills, she is an exceptionally kind, approachable, and helpful person.