Backend Software Engineer at Waller Group in Vilnius, Lithuania

**The Mission**

Wallee Group is a leader in advanced payment solutions, dedicated to providing robust, scalable, and secure systems across multiple domains. We enhance customer experiences through innovative payment and finance technology that empowers businesses to grow efficiently. With operations spanning several countries, we thrive on collaboration and agility, utilizing the Scrum framework to drive our international teams. At Wallee, we stay at the forefront of market trends, continuously innovating to deliver premier services to our global customers.

**The Role**

We're looking for a Backend Software Engineer (Java mainly) with hands-on AWS experience to join us. Whether you bring a few years of experience or are a seasoned engineer, what matters is that you write clean, well-tested Java code, understand distributed systems, and are comfortable owning services in production. You'll design, build, and operate backend services end to end - from architecture discussions to deployment and monitoring.

## Tasks

**What you'll do**
• Design, develop, and maintain backend services in Java running on AWS.
• Build and optimize data processing and reporting pipelines handling large datasets.
• Work with AWS services such as S3, Athena, Lambda, SQS, Redshift, and RDS to build scalable, cost-efficient solutions.
• Own your services in production: monitoring, alerting, performance tuning, and incident response.
• Collaborate with product and other engineering teams across the tribe to deliver features that matter to merchants.
• Contribute to code reviews, technical design discussions, and the continuous improvement of our engineering practices.

## Requirements

**What you bring to the table**
• Solid professional experience in Java backend development (Spring, Quarkus or similar frameworks).
• Hands-on experience building and running workloads on AWS.
• Good understanding of relational databases and SQL (PostgreSQL experience is a plus).
• Experience with distributed systems, message queues, or batch/stream data processing.
• A pragmatic approach: you value maintainability, testing, and shipping working software.
• You possess a fluent command of the English language.
• A university degree in Computer Science or a closely associated discipline is required.

**Nice to have**
• Experience with AWS analytics services (Athena, Glue, ETL).
• Familiarity with infrastructure as code (Terraform, CloudFormation).
• Background in payments, fintech, or other high-volume transactional domains.

## Benefits

**Why Join Wallee?**
• **Modern Workspace:** A beautiful office in the heart of Vilnius - comfortable, bright, and collaboration-ready.
• **True Flexibility:** We embrace a **hybrid** way of working with 3 days per week in our office to foster collaboration, complemented by flexible daily hours and a **4-week "Work from Anywhere"** policy every year.
• **Innovation First:** We work with the latest tech stacks in a flat hierarchy where your voice actually matters.
• **Growth & Culture:** Competitive compensation, in the range of €2,500 – €4,000 gross/month, depending on experience, seniority, and technical expertise, **personal development budgets,** and a social calendar filled with events.
• **The Perks:** Fresh fruits, snacks, and high-quality coffee to keep you fueled.

Don’t tick every box? Neither do most great hires. If the role feels right, reach out, we’d love to see if we’re a match.