Principal Python Backend Engineer — Scale & Reliability

Nordic Investin Group Aktiebolag; Stockholms kommun; On-site; SEK 1,300,000 - 1,900,000; Full time

Job summary

Nordic Investin is recruiting a Principal Backend Engineer Python to tackle high throughput, unpredictable load and production-grade architectural decisions. You will set technical direction for Python services, shaping APIs and event-driven workflows while remaining close to the code.

You will review designs, drive reliability, mentor engineers and collaborate with product and security teams to manage risk and sequencing.

Qualifications

• Production experience with Python and modern service frameworks.
• Strong knowledge of distributed systems, concurrency and failure handling.
• Experience with PostgreSQL or another relational database at scale.
• Hands-on ability with cloud infrastructure, containers and CI/CD.
• Evidence of architectural leadership without losing delivery focus.
• Clear professional communication in English.

Responsibilities

• Shape service boundaries, APIs and event-driven workflows.
• Build and review production Python services with measurable reliability targets.
• Guide database, caching and messaging choices under real load.
• Improve observability, incident learning and performance testing.
• Mentor senior engineers and raise the standard of technical decision records.
• Work with product and security leaders on risk, scope and sequencing.

Skills

Python

Distributed systems

Concurrency

Relational databases

Cloud infrastructure

English communication

Tools

PostgreSQL

Job description

Nordic Investin is recruiting a Principal Backend Engineer Python to tackle high throughput, unpredictable load and production-grade architectural decisions. You will set technical direction for Python services, shaping APIs and event-driven workflows while remaining close to the code.

You will review designs, drive reliability, mentor engineers and collaborate with product and security teams to manage risk and sequencing.