Senior Cloud Software Engineer

Job Description:

Merkle powers the experience economy. For more than 35 years, the company has put people at the heart of its approach to digital business transformation. As the world's only integrated experience consultancy with a heritage in data science and business performance, Merkle delivers holistic, end-to-end experiences that drive growth, engagement, and loyalty. With more than 16,000 employees, Merkle operates in 30+ countries throughout the Americas, EMEA, and APAC.

In Bulgaria, we manage a global client portfolio, providing a single source of expertise, technology, and operational support. We have a proven track record for delivering, managing, and innovating multi-channel commerce platforms for major international brands and retailers, including adidas, Clarins, ASDA, Shiseido, and more. Our world-class team has delivered sites for over 35 brands, including more than 400 transactional e-commerce sites across 60 locations on 6 continents. Our scope is expanding with the introduction of new data engineering practices, paid search and social advertising, and SEO. We look forward to what's next.

We're hiring a Senior Cloud Software Engineer at Merkle in Sofia.

What you`ll do:

• Design and implement scalable, event-driven backend services on AWS, with Lambda as the primary compute layer alongside API Gateway, SQS, SNS, EventBridge, and Step Functions

• Write performant Lambda functions with a solid grasp of cold-start mitigation, execution context reuse, provisioned concurrency, and idempotency patterns

• Architect cloud infrastructure using IaC (AWS CDK, Terraform, or CloudFormation) and own it end-to-end from design through to deployment

• Build and maintain RESTful and/or GraphQL APIs with a focus on security, versioning, and developer experience

• Own and optimise CI/CD pipelines (Jenkins / GitHub Actions), enforcing automated testing, security scanning, and seamless production deployments

• Model and query both relational (PostgreSQL / Aurora) and NoSQL (DynamoDB) databases effectively

• Instrument serverless systems for observability, structured logging, distributed tracing, and monitoring via CloudWatch, Datadog, or equivalent

• Contribute meaningfully in a Scrum environment, breaking down complex technical initiatives into well-defined user stories

• Champion the use of AI-assisted development tooling (GitHub Copilot, Kiro, etc.) to raise the team's overall velocity

What we`ll need:

• 7+ years of professional backend engineering experience, with a significant portion in cloud-native, serverless architectures

• Expert-level TypeScript and modern JavaScript; strong Node.js background with production experience in NestJS, Express, or Fastify

• Deep hands-on AWS experience, you think in serverless patterns, not just services

• Comfortable owning architectural decisions and articulating them clearly to both technical peers and non-technical stakeholders

• High standards around code quality, test coverage, and peer review

• Curious about how AI tooling is reshaping engineering workflows, and proactive about applying it practically

• AWS certification (Developer or Solutions Architect) is a plus, as is experience with Kubernetes/EKS or the Serverless Framework

What we offer:

• We are strong believers in work-life balance, so we offer all our employees 25 days of paid leave and 3 fixed well-being days off per year.

• A hybrid work model for our teams so they can work from the office or the comfort of their home.

• Free parking is available for all our employees working from the office.

• Complimentary drinks and snacks in the office to keep energy levels up.

• Parent-friendly culture and potential for additional days off to create new memories with your loved ones.

• Life Insurance, Health and dental insurance plan or, if selected, gift vouchers instead.

• Sports card, partially covered by the company and food vouchers.

• 2 days of paid leave for volunteering and numerous charity initiatives throughout the year.

• Opportunity to attend training, conferences and get certification sponsored by the company upon availability and business need.

About dentsu:

Taking a people-centred approach to business transformation, we use insights to connect brand, content, commerce and experience, underpinned by modern creativity. As part of Dentsu Group Inc., we are headquartered in Tokyo, Japan, and our 65,000 employee base of dedicated professionals works across four regions (Japan, Americas, EMEA and APAC). Dentsu combines Japanese innovation with a diverse, global perspective to drive client growth and to shape society.

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