Senior Backend Engineer

About Sirma 

Sirma Financial Industry Vertical (SFIV) is part of Sirma Group Holding – one of the leading ICT groups in Bulgaria, publicly listed on the Bulgarian Stock Exchange (SKK).

At SFIV, we help banks, financial institutions, payment providers, and insurers modernize their platforms and accelerate digital transformation. Our teams combine deep financial industry expertise with enterprise engineering, modern architectures, integration technologies, and AI-driven solutions.

We’re looking for a Senior Backend Engineer to take a leading role in supporting our development teams and advancing an established platform used for mission-critical financial services. You will shape solution architecture, drive technical design, and build reliable backend services while working with experienced colleagues in a dynamic, continuously evolving environment shaped by changing client needs.

Your responsibilities:

• Take a leading role in the design, development, maintenance, and continuous evolution of backend applications, services, and the existing platform.
• Translate complex business and functional requirements into effective technical designs and production-ready solutions.
• Build with PHP, using Laravel and/or Symfony as part of our backend technology stack.
• Shape backend solution architecture and make sound technical design decisions across services, modules, and interfaces.
• Design and integrate APIs, backend services, enterprise applications, databases, and external systems.
• Help evolve our existing multi-client platform toward more modular, API-driven, AI-enabled, and microservices-based architecture in response to changing client needs.
• Work closely with experienced solution architects, engineers, and product professionals to turn architecture and client requirements into effective implementation.
• Set the bar on engineering standards, design consistency, and continuous improvement through code reviews and technical guidance.
• Write reusable, secure, well-structured components that other engineers can build on.
• Design and optimize data models, queries, and database interactions across MySQL, MariaDB, PostgreSQL, and MongoDB.
• Support data integrity, reliability, and efficient processing at scale.
• Participate in the full development lifecycle — from design through deployment, troubleshooting, and support.
• Drive the modernization and continuous development of the existing platform toward more maintainable, scalable, and adaptable architectures.
• Use Git, automated testing, and CI/CD practices as standard parts of how we build.

Role’s requirements:

• Strong senior-level backend engineering experience, with real ownership of complex technical solutions.
• Solid understanding of software architecture, design principles, maintainability, scalability, security, and performance.
• Hands-on PHP experience, with practical experience in Laravel and/or Symfony.
• Experience designing, developing, and integrating APIs and distributed backend services.
• Experience with databases including MySQL and PostgreSQL, covering data modeling, query optimization, and performance tuning. Experience with MariaDB and MongoDB is considered an advantage.
• Ability to evaluate technical options, make pragmatic architecture decisions, and guide implementation quality.
• Strong analytical and problem-solving skills, with the ability to work independently and take ownership.

Advantages:

• Technical leadership, architecture ownership, or experience mentoring other engineers.
• Experience with both Laravel and Symfony, plus unit testing / test-driven development.
• Experience with CMS and digital commerce platforms such as Drupal, Magento, Shopify, and Joomla.
• Enterprise application integration, API architecture, or event-driven / service-oriented design experience.
• Experience with CI/CD pipelines, containerization, or cloud environments.
• Background in banking, insurance, or other regulated industries.
• Curiosity about AI-assisted development and emerging engineering practices.

Why Join Sirma? 

• Learn from the Best
  Work alongside some of the brightest minds in the industry, collaborate with international experts, and be part of a culture where knowledge sharing is part of everyday life.
• Build What Matters
  Take on challenging projects, solve real business problems, and work with cutting-edge technologies that drive innovation across industries.
• Flexibility That Works for You
  Start your day between 8:00 and 10:00, depending on your team’s schedule. We trust people to organize their time in a way that works for them and their team.
• Internal Training Academy
  Through Sirma Academy, we offer practical, hands-on training programs focused on real-world software engineering skills, modern technologies, and best practices.
• One Company, Multiple Locations
  Whether you prefer a change of scenery or need flexibility, you can work from any Sirma office and stay connected with colleagues across the Group.
• We Care About Your Wellbeing
  Additional health and dental insurance, a Multisport card, and dedicated relaxation spaces help you stay healthy, active, and energized.
• Supporting Students’ Success
  Balancing education and work isn’t always easy. That’s why we provide additional paid vacation days for students.
• Work Hard. Celebrate Together
  From team buildings and company parties to sports events and social initiatives, we create opportunities to connect, have fun, and make lasting memories.
• Make an Impact Beyond Work
  Join charity campaigns and community initiatives that allow us to grow not only as professionals but also as responsible global citizens.
• The Little Things Matter
  Fresh fruit in the office, gaming and relaxation areas, a generous referral bonus program, and comfortable office spaces designed for both focus and connection help make every day at Sirma even better.

Life at Sirma 

At Sirma, you’ll find more than a job. You’ll join a community of innovators, problem-solvers, and technology enthusiasts who are passionate about learning, sharing knowledge, and building the future together. If you’re looking for a place where your ideas matter and your growth is a priority, Sirma is the place for you.

Apply now!
We are waiting for your CV!
There’s a lot going on at Sirma!
We’re looking forward to meeting our next colleague. 🙂

We will contact only the candidates selected for further consideration. Confidentiality is guaranteed. We thank all candidates for applying.