Backend Software Engineer
Wallee Group AG1 month ago
Vilnius, LithuaniaMid Level
Responsibilities
- Design, develop, and maintain backend services in Java on AWS.
- Build and optimize data processing and reporting pipelines handling large datasets.
- Use AWS services including S3, Athena, Lambda, SQS, Redshift, and RDS to build scalable and cost-efficient solutions.
- Own services in production, including monitoring, alerting, performance tuning, and incident response.
- Collaborate with product and engineering teams to deliver merchant-focused features.
- Participate in code reviews, technical design discussions, and continuous improvement of engineering practices.
Requirements
- Professional experience in Java backend development with Spring, Quarkus, or similar frameworks.
- Hands-on experience building and running workloads on AWS.
- Understanding of relational databases and SQL; PostgreSQL experience is a plus.
- Experience with distributed systems, message queues, or batch and stream data processing.
- Commitment to maintainable, well-tested software and practical delivery.
- Fluent English communication skills.
- A university degree in Computer Science or a closely associated discipline is required.
- Experience with AWS analytics services such as Athena and Glue, ETL, infrastructure as code using Terraform or CloudFormation, or payments and high-volume transactional domains is preferred.
Benefits
- Hybrid work arrangement with three days per week in the Vilnius office, flexible daily hours, and a four-week Work from Anywhere policy each year.
- Personal development budgets and an active social calendar.
- Modern collaborative office with fresh fruits, snacks, and high-quality coffee.
- Gross monthly compensation is listed as €2,500–€4,000 depending on experience, seniority, and technical expertise.
About Wallee Group AG
Wallee Group AG builds an omnichannel payments platform for merchants, offering an online payment gateway, in‑store card terminals, and developer APIs to accept and reconcile payments across channels. It sells payment processing and related services on a transaction-fee basis, with plugins for common e‑commerce systems and support for multiple payment methods. The privately held company is headquartered in Winterthur, Switzerland, and operates across several European markets.