Senior Software Engineer

Senior Software Engineer

Avenga is an international engineering firm helping businesses operate with AI at the core. With 6,000+ experts worldwide, we combine engineering expertise with AI-native thinking to turn ambitious ideas into real-world impact across industries, technologies, and markets.

At the core of the role

You will join a FinTech project focused on financial services, built around a modern, distributed architecture. The platform uses an event-sourcing and microservice-oriented approach, supporting scalable and reliable processing of financial data and business events.

Core skills you’ll bring

• 10+ years of software development experience with a strong emphasis on systems engineering
• Strong proficiency in C#/.NET (Java acceptable)
• Proven experience designing and building APIs
• Solid background in distributed messaging systems and event-driven architectures
• Hands-on experience with Pulsar or Kafka, including event streaming and event sourcing patterns at scale
• Experience implementing financial calculations, pricing engines, or quantitative models
• Experience with NoSQL databases such as MongoDB
• Familiarity with telemetry and observability tools such as Sentry, Datadog, or Elasticsearch
• Experience building and scaling component libraries or design systems
• Experience with AI-assisted development tools such as GitHub Copilot, Claude, or similar
• Strong communication skills and a proven track record of cross-functional collaboration

Nice-to-have

• Familiarity with fixed income or securities pricing concepts
• Familiarity with Databricks or Lakehouse architectures
• Hands-on experience with SignalR or WebSocket-based systems

The impact you’ll create

• Design and develop high-quality services using C#/.NET or Java
• Build and maintain ASP.NET service-side applications with a focus on scalability and long-term reliability
• Work with distributed messaging frameworks and event-driven architectures to power high-throughput systems
• Design, implement, and operate event streaming and event sourcing solutions using Pulsar or Kafka, including topic design, consumer group management, and replay strategies
• Develop and optimize data solutions using NoSQL databases such as MongoDB
• Integrate observability platforms such as Datadog or Elasticsearch to support system monitoring and diagnostics
• Implement telemetry and monitoring best practices using Sentry or equivalent tools
• Collaborate effectively across teams to deliver features and align on technical direction
• Build reusable, testable infrastructure and uphold consistent coding standards across teams
• Foster a culture of engineering excellence and continuous improvement across the team
• Leverage AI-assisted development tools such as GitHub Copilot and Claude to improve productivity and code quality

What supports your journey

People are at the core of Avenga. We provide equal opportunities regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to a respectful environment where everyone can be themselves, share their ideas, and feel that they belong.

Locations

Ruse, Sofia

Technology

.NET

Seniority

Senior-level