Senior Software Engineer
Confirmed on the employer's own hiring board on Oct 18, 2026. First seen by Alion on Oct 15, 2026. B3 Consulting Group scores C on the Alion truth index.
We are part of an international organization listed on Nasdaq Stockholm, operating in 11 countries. In Poland, we work with full autonomy. We independently choose our technologies, processes, and ways of working while maintaining the highest professional standards.
We deliver a wide range of IT projects in Poland and internationally, across multiple domains and technologies. This allows our consultants to develop their competencies and gain experience aligned with their professional ambitions.
Our collaboration is built around the CARE philosophy. For us, it means responsible project matching, transparent cooperation, and a long-term approach to professional growth.
Join us as Senior Software Engineer.
In this role, you will design and scale backend microservices for the merchant payments domain, building core services for prepaid wallets, payment gateway integrations, invoicing, and reporting
Grow in an environment that cares about your development as much as you do.
Your responsibilities
Design and deliver backend microservices in the merchant payments and reporting domain, including prepaid wallets, invoicing, and SAP / payment gateway integrations.
Migrate legacy services toClean Architecture and Hexagonal Architecture, keeping domain logic framework-free and documenting choices via Architecture Decision Records.
Build event-driven integrations over REST and Kafka with Avro, enforcing idempotency and money handling correctness.
Own full lifecycle deployment and quality using Helm, GitLab CI, GitOps on Kubernetes, and testing with Spock, Testcontainers, and Spring Cloud Contract.
Requirements
Experience with backend microservices using Java or Kotlin, Spring Boot, Clean Architecture, and Hexagonal Architecture.
Experience with event-driven architecture using Kafka and Avro, alongside REST integrations.
Knowledge of financial logic handling, including idempotent endpoints, precise monetary calculations, and PII protection.
Experience with testing and quality tools using Spock, Testcontainers
Experience with GitOps and DevOps practices using Helm, GitLab CI, and Kubernetes.
Experience using AI-assisted and agentic coding tools (such as Claude Code, GitHub Copilot, Cursor, or Codex)
You need to live in Poland and/or be eligible to work here.
What we offer
- Work in a Scandinavian culture built on logic and dialogue.
- Health and sports benefits tailored to your needs.
- Speed Coaching - short sessions that provide new perspectives and solutions.
- Sports training, an internal team, and opportunities to take part in competitions.
- Team events and development-focused meetups.
Apply today!