Senior Software Engineer - Platform (Runtime)

emagine is looking for a Senior Software Engineer - Platform (Runtime)

Start: ASAP

Location: Stockholm

Working model: On-site, 5 days per week

We are looking for a senior Software Engineer with deep expertise in Platform Engineering to join a high-growth product organization. This is a hands-on role for someone who has extensive experience building and operating platform infrastructure at scale, including platform hosting, distributed systems, databases, runtime environments, and control planes. The ideal candidate is comfortable taking ownership of critical platform capabilities and driving reliability, scalability, and operational excellence across the entire stack.

Key Responsibilities

• Own and develop the application hosting and deployment platform that serves production workloads.

• Build, operate, and scale platform infrastructure and runtime environments.

• Manage platform services such as storage, logging, workflows, authentication, and other critical infrastructure components.

• Design and maintain custom domain infrastructure, including SSL provisioning and DNS management at scale.

• Evaluate, onboard, and migrate third-party services as part of an evolving best-of-breed platform strategy.

• Drive operational excellence through monitoring, alerting, incident response, runbooks, and capacity planning.

• Ensure platform reliability, performance, scalability, security, and cost efficiency.

Required Experience

• Senior-level engineering background with 8+ years of relevant experience.

• Strong experience within Platform Engineering, Site Reliability Engineering (SRE), Infrastructure Engineering, or similar disciplines.

• Proven track record of building and operating platforms rather than solely developing application features.

• Hands-on experience with:

  • Platform engineering and platform hosting

  • Running and operating databases in production environments

  • Designing and building control planes

  • Distributed systems and multi-tenant architectures

  • Container orchestration and cloud-native infrastructure

  • Infrastructure operations at scale

• Experience managing vendors, evaluating technologies, leading migrations, and ensuring SLA compliance.

• Strong operational mindset with focus on uptime, latency, scalability, resilience, and cost optimization.

Preferred Experience

• Experience operating large-scale multi-tenant control planes.

• Experience with Cloudflare services such as Workers, Pages, R2, or D1.

• Hands-on experience with Kubernetes, Envoy, or other CNCF technologies.

• Familiarity with ClickHouse or similar analytics databases.

• Experience with managed database platforms such as Supabase, Neon, AWS Aurora, or Google Cloud SQL.

• Proven history of driving infrastructure cost optimization initiatives.

Technical Environment

• Frontend: React, TypeScript

• Backend: Golang, Rust

• Cloud: AWS, GCP, Cloudflare

• Data: ClickHouse, Firestore, Spanner, BigQuery

• DevOps: Kubernetes, Terraform, CI/CD, OpenTelemetry (OTEL)

This assignment is suitable for a highly experienced Platform Engineer who enjoys owning critical infrastructure, building platform capabilities from the ground up, and working on complex systems that operate at significant scale. Candidates must be comfortable working on-site in Stockholm on a daily basis.