Senior Software Engineer - .NET

Location: Sofia, bg

Company Description

Experian is a global data and technology company, powering opportunities for people and businesses around the world. We help to redefine lending practices, uncover and prevent fraud, simplify healthcare, create marketing solutions, and gain deeper insights into the automotive market, all using our unique combination of data, analytics and software. We also assist millions of people to accomplish their financial goals and help them save time and money.

We operate across a range of markets, from financial services to healthcare, automotive, agribusiness, insurance, and many more industry segments.

We invest in people and new advanced technologies to unlock the power of data. As a FTSE 100 Index company listed on the London Stock Exchange (EXPN), we have a team of 22,500 people across 32 countries. Our corporate headquarters are in Dublin, Ireland.

Job Description

The Senior Software Engineer delivers high‑quality, scalable solutions, resolves complex technical challenges, and guides tasks to completion.

You can take complex user stories and technical requirements, break them down into well‑defined tasks, estimate effort, and deliver reliably. Using understanding of business and user needs, you will influence technical decisions, prioritization, and overall solution quality.

This role is well suited to a collaborative professional who excels in a fast‑moving environment, enjoys mentoring others, and develops skills through hands‑on work and knowledge sharing.

You will report into the Software Team and Quality Assurance Manager.

What you'll do:

• Lead and contribute to discussions and backlog refinement, including scope definition, acceptance criteria, and architectural considerations.
• Translate complex functional and non‑functional requirements into technical solutions.

• Design and implement correct, performant, scalable, and reliable code following development standards, processes, and acceptance criteria.
• Investigate and resolve complex defects (internal and external), performing Root Cause Analysis.
• Implement automated tests at all application levels (unit, component, integration, end‑to‑end) to ensure quality and stability.
• Participate in Agile ceremonies including planning, stand‑ups, retrospectives, backlog refinement, and reviews.
• Collaborate with team members to achieve shared goals and delivery commitments.

Qualifications

What you'll bring:

• Experience with software development and testing processes supporting scalable solutions.
• 5+ years of experience .NET / C# development
• Experience with design and architectural patterns
• Solid knowledge of OOP / SOLID principles
• Experience with database development and SQL
• Experience with HTML, CSS, JavaScript
• Experience with WPF, WCF, jQuery
• Experience with QA methodologies and tools
• Experience with secure development best practices
• Experience working against defined SDLC processes
• Experience with different technologies is also desirable, including DevOps, TDD, NUnit, SpecFlow, and SonarQube.
• Familiarity with ASP.NET WebForms, NodeJS, and NuGet.
• Knowledge of Oracle PL/SQL , experience with Jira, Confluence, and Git/Bitbucket, exposure to ML.NET or Python ML tools is a nice-to-have.

Additional Information

You will get:

• Personal Development - career pathway for professional growth supported by learning and development programs and unlimited access to online educational training courses, learning materials and books.
• Work environment - excellent work conditions with friendly environment, recognized team spirit, and fun and quality recreation time.
• Social benefit package including life insurance, food vouchers, additional health insurance, monthly flex allowance and internet coverage, corporate discounts, marriage and childbirth / adoption allowance, Multisport card, Sharesave plan, Employee assistance program, а birthday gift and many other benefits!
• Work-life balance - 25 days paid vacation, 1 additional day off for your birthday and extra 3 paid days for participation in Social responsibility event.
• Opportunity for Flexible working hours and Home Office.

Experian is an Equal opportunity employer. Everyone can succeed at Experian and bring their whole self to work, irrespective of their gender, ethnicity, religion, colour, sexuality, physical ability or age. If you have a disability or special need that requires accommodation, please let us know at the earliest opportunity.

#LI-Hybrid

This is a hybrid remote/in-office role.

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