System Architect

Advantage 360; Sweden; Hybrid; SEK 500,000 - 700,000; Full time

Job summary

Advantage 360 in Sweden is seeking a skilled backend developer specializing in C# / .NET to contribute to system architecture and develop robust backend services. Candidates should possess strong experience in designing service-based architectures and have proficiency with REST APIs.

Join a collaborative team that values continuous growth, where you'll work closely with engineers and product owners. This role presents a unique opportunity to engage with high-impact projects within a dynamic environment.

Qualifications

• Strong experience designing and building backend systems.
• Solid proficiency in C# / .NET and Linux-based environments.
• Experience with REST APIs and service-based architectures.
• Good understanding of distributed systems concepts.

Responsibilities

• Contribute to the design of system architectures for backend services.
• Design and implement backend services and APIs using C# / .NET.
• Design and implement integrations between internal services and external systems.
• Participate in code reviews and support performance analysis.

Skills

Designing and building backend systems

C# / .NET proficiency

Experience with REST APIs

Understanding of distributed systems

Relational databases (e.g. MySQL, PostgreSQL)

Familiarity with Git and CI/CD

Docker and containerized deployments

Technical expert and advisor capacity

Tools

Docker

Kafka

RabbitMQ

Kubernetes

Job description

What You Will Do

Architecture & Design
Contribute to the design of system and platform architectures for backend services
Translate architectural concepts into concrete designs, APIs, and components
Define and document service boundaries, data models, integration patterns, and runtime considerations
Support architectural decisions related to scalability, reliability, and maintainability

Hands‑On Development

Design and implement backend services and APIs using C# / .NET
Contribute production-quality code alongside the engineering team
Build and evolve system components following agreed architectural patterns
Participate in refactoring and modernization of existing systems

Integration & Distributed Systems

Design and implement integrations between internal services and external systems
Work with asynchronous, message-driven architectures supporting transactional and state-based processing
Help ensure systems are robust, idempotent, and resilient

Quality & Operational Readiness

Participate in code reviews and design reviews
Support performance analysis, troubleshooting, and production issue resolution
Help define logging, monitoring, and observability patterns
Ensure solutions are production-ready and operable

Collaboration & Growth

Work closely with the team to align on platform direction
Collaborate with engineers, product owners, and domain experts
Engage with customers when needed to clarify requirements and validate solutions
Share architectural knowledge and best practices within the team
Continuously grow architectural and domain expertise

What We’re Looking For

Core Skills & Experience We expect candidates to meet most of the core requirements below and demonstrate the ability to grow in adjacent areas.

• Strong experience designing and building backend systems
• Solid proficiency in C# / .NET and Linux-based environments
• Experience with REST APIs and service-based architectures
• Good understanding of distributed systems concepts
• Experience with relational databases (e.g. MySQL, PostgreSQL)
• Familiarity with Git, CI/CD pipelines, and modern development workflows
• Ability to balance design thinking with practical implementation
• Familiarity with Docker and containerized deployments
• Comfortable working across teams as a technical expert and advisor

Highly Valued Skills & Experience (Specialized Knowledge)

• Telecom / Platform Domain Exposure to telecom OSS, service fulfillment, or network automation
• Familiarity with TM Forum Open APIs or similar telecom standards
• Understanding of order, service, and resource lifecycle concepts
• Orchestration & Automation Experience with workflow engines, orchestration platforms, and state machines
• Experience with microservices-based architectures and messaging systems
• Understanding of API-driven, asynchronous, and message-based architectures
• Experience with BPMN engines (Camunda, Flowable, Zeebe, etc.)
• Network Automation Exposure to network controllers and automation systems
• Experience in telecom networks (IP, MPLS, optical, mobile, access, core)
• Familiarity with NETCONF/YANG, gNMI, SNMP, and CLI-based automation
• Understanding of intent-based and policy-driven networking (IBN)
• Other Familiarity with Kubernetes deployments
• Kafka, RabbitMQ, and event streaming platforms
• Observability tools (Prometheus, Grafana, OpenTelemetry)
• Exposure to time-series databases (InfluxDB, VictoriaMetrics, etc.)
• Experience working with systems in production environments

Lumine Group is an equal opportunity employer, we recruit, hire, train, promote and provide all other privileges of employment to qualified people without regard to age, race, color, creed, national origin, gender, gender identity, gender expression, disability, marital status, veteran status, citizenship status, ethnicity, familial status, religion, sexual orientation or any other classification for which discrimination is prohibited.