Senior Software Engineer (Java)

About the Position

We are one of Switzerland's leading online shops in both B2C and B2B - a combination that is nearly unique in Europe. Behind it stands one of the most modern logistics operations on the continent: highly automated, scalable and with further growth potential.

Here you do more than build software. You bring your personality, actively shape the department and help define the eCommerce of tomorrow.

Senior Software Engineer (Java)

Senior • Remote

6,000 - 7,500 EUR

Krakow, Poland

Responsibilities

Join a cross-functional product team and build scalable solutions with real impact for our customers and core business processes. You bring curiosity, team spirit and a genuine appetite for learning - and you take part in shaping not just the implementation, but the architecture, quality standards and the question of what should be built in the first place.

• Collaborate with a hands-on Team Lead, a Product Manager, and several T-shaped Full-Stack Engineers.
• Work in Scrum or Kanban depending on what fits the team.
• Shape high code quality within your team and across team boundaries.
• Build and operate distributed backend systems at scale.

Requirements

Java & Backend Depth

• Deep, hands-on experience with Java 21+ - including modern language features such as records, sealed classes, pattern matching, and structured concurrency.
• Practical experience with reactive or asynchronous programming models - with Vert.x, Project Reactor, or comparable toolkits.
• Experience with Java virtual threads (Project Loom) and understanding how they change concurrency models in practice.
• Built and operated distributed backend systems at scale - ideally in eCommerce or comparable high-throughput domains.
• Comfortable with event-driven communication patterns (Kafka, messaging systems) and understand the trade-offs between synchronous and asynchronous approaches.

Engineering Practices

• Lived modern engineering practices in your daily work: CI/CD, automated testing, decoupling, code reviews, and observability.
• Apply concepts like DDD, Clean Architecture, Event-Driven Architecture, SOLID, feature flags, and dependency injection with pragmatism and judgement.
• Advocate of "you build it, you own it" and have experience in environments that release multiple times per day.
• Guide the team on code quality and meaningful testing practices.

AI / Agentic Coding - a core expectation, not a nice-to-have

• Use AI coding tools - such as GitHub Copilot - as a natural part of your daily workflow for code generation, test writing, refactoring, and documentation.
• Go beyond autocomplete: you actively explore agentic workflows such as automated PR review, scaffolding, and multi-step code generation - and you evaluate their output critically before committing.
• Understand the risks: you know that AI-generated code can accelerate technical debt and erode understanding if not reviewed carefully, and you enforce review standards accordingly.
• Help introduce and shape AI tooling adoption within the team - sharing what works, what does not, and where the limits are.

Collaboration & Product Mindset

• Share knowledge through pair programming, whiteboard sessions, and code reviews - and actively help raise the engineering level of the team.
• Work closely with Product Managers and genuinely want to understand the problem being solved - you help shape requirements and think from a user and business perspective.
• Value real agility: short iterations, fast learning, active feedback loops, and data-informed decisions.
• A warm communicator who values an open learning culture, builds personal connections within the team, and does not take themselves too seriously.

We Offer

• Competitive salary range of 6,000 - 7,500 EUR per month.
• Opportunity to work remotely.
• Be part of a leading e-commerce company with a focus on innovation and technical expertise.
• Collaborate across cross-functional teams, including product management, UX/UI design, and backend development.

About the Company

Brack.Alltron Service AG is a company operating in the e-commerce industry, focusing on mobile commerce solutions. The company is dedicated to shaping the future of mobile e-commerce by developing high-quality, scalable mobile applications that enhance user experience and customer satisfaction. Brack.Alltron Service AG values innovation, technical expertise, and a commitment to clean, testable code. The company emphasizes collaboration across cross-functional teams, including product management, UX/UI design, and backend development, to deliver customer-centric mobile solutions. It is committed to continuous improvement and knowledge sharing within the developer community, fostering an environment that encourages the integration of new ideas and technologies.