Senior Backend Developer (Data & Payments)

Celsus Engineering AB

Okänd ort

Previous experience is desired

~55 500 kr / per month ->
Fixed monthly, weekly, or hourly salary

Published 2026-06-22 12 månader - upp till 2 år Full time 2 Available vacancies

162 days left
to apply for the job

Description

Build the next-generation payment platform on a modern and future-proof tech stack. Work within a cross-functional team.

What we’re looking for

Proven ability to design, optimize, and operate data-intensive systems, including schema design, performance tuning, and production troubleshooting in MS SQL Server–based environments.

Deep understanding of database performance and reliability, including indexing strategies, query optimization, and handling production issues.

Experience building and operating backend services using .NET/C#, with a solid understanding of microservice architectures and distributed systems.

Experience designing and working with asynchronous messaging and event-driven systems, using Kafka, IBM MQ, or similar technologies.

Experience running services in containerized and orchestrated environments (Docker, Kubernetes/OpenShift), with awareness of scaling, resilience, and failure modes.

Experience contributing to or owning CI/CD pipelines for database changes and deployment automation, with a focus on safe, repeatable releases.

A collaborative engineering mindset, with a willingness to share knowledge, learn continuously, and improve how the team builds and runs software.

Meritorious with experience from financial services, payments, or other regulated environments.

Strong communication skills, with fluency in English; Swedish is a plus.