Software Engineer - Backend Platform

Evolution; Stockholms kommun; On-site; SEK 900,000 - 1,200,000; Full time

Benefits offered by this job

Competitive pension

Health and medical insurance

30 paid vacation days

Fitness benefit

Professional growth

Sport activities

Job summary

Evolution is building a new platform from first principles, focusing on backend services and distributed systems. You will design, implement, and operate APIs, data models and product-facing components, working with a stack that emphasizes Java, Spring Boot, Kafka, and PostgreSQL in a modern containerised environment.

Join a small team that tackles high-throughput, real-money transaction flows across regions, with strict latency, correctness and security constraints from day one.

Qualifications

• Strong backend engineering fundamentals.
• Comfort with backend systems and databases.
• Ability to reason about correctness, concurrency, performance.
• Interested in distributed systems and production-grade engineering.

Responsibilities

• Build backend services and platform components using Java and Spring Boot.
• Design and implement APIs, data models, internal tools, and product-facing systems.
• Work with Kafka-based event-driven architecture and high-throughput transaction flows.
• Build systems using PostgreSQL with focus on performance and observability.
• Develop services designed to run in a modern containerised environment.
• Contribute to decisions around consistency, latency, scalability, reliability and security.
• Write clear, maintainable, well-tested code with robustness in mind.
• Participate in code reviews, system design discussions and trade-off decisions.

Skills

CS fundamentals

Distributed systems

Concurrency

System design

Production-grade engineering

Tools

Java

Spring Boot

Kafka

PostgreSQL

Docker

Job description

We’re building something new within Evolution.

This is not a role focused on maintaining mature systems or working inside a fixed technical setup. It is an opportunity to help build a new platform from first principles, using modern backend technologies to solve hard engineering problems under real production constraints.

The system we’re building will operate across regions and process thousands of real-money transactions per second with strict consistency guarantees. Low latency, correctness, performance, and security are not things we optimise for later. They are design constraints from day one.

We are looking for software engineers who want to work close to the core of the platform: backend services, event-driven systems, databases, and performance-critical product flows.

Job Description

What You’ll Work With

You will work with technologies such as:

• Java
• Spring Boot
• Kafka
• PostgreSQL
• Docker

You do not need to be an expert in every technology from day one, but you should have strong backend engineering fundamentals and a serious interest in building reliable distributed systems using this type of stack.

What You’ll Do

• Build backend services and platform components using Java and Spring Boot
• Design and implement APIs, data models, internal tools, and product-facing systems
• Work with Kafka-based event-driven architecture and high-throughput transaction flows
• Build systems using PostgreSQL, where performance, correctness, and observability matter
• Build services designed to run in a modern containerised environment
• Contribute to technical decisions around consistency, latency, scalability, reliability, and security
• Write clear, maintainable, well-tested code with a strong focus on robustness
• Participate in code reviews, system design discussions, and technical trade-off decisions

Qualifications

Who You Are

• You have strong computer science fundamentals
• You are comfortable working with backend systems and databases
• You can reason clearly about correctness, concurrency, performance, and system design
• You are interested in distributed systems, event-driven architecture, and production-grade engineeringYou learn quickly and enjoy working across different parts of the stack
• You are ambitious, self-driven, and motivated to grow in a high-performing engineering environment
• You want to work in a small team with high standards and direct technical feedback

What Will Strengthen Your Application

• Experience with Java and Spring Boot
• Experience with Kafka or other event-streaming/message-driven systems
• Strong understanding of PostgreSQL or relational database design
• Experience with Docker or containerised development workflows
• Experience building systems where performance, correctness, reliability, or security mattered
• Internship experience or a few years of software engineering experience in a technically demanding environment
• Strong academic results from a rigorous technical university or program
• Personal, open-source, academic, or professional projects that show technical depth and ownership
• Competitive programming, hackathons, olympiads, research, or other high-signal technical achievements
• Clear communication and the ability to discuss technical trade-offs thoughtfully

Additional Information

We’re building something new within Evolution.

This is not a role focused on maintaining mature systems or working inside a fixed technical setup. It is an opportunity to help build a new platform from first principles, using modern backend technologies to solve hard engineering problems under real production constraints.

The system we’re building will operate across regions and process thousands of real-money transactions per second with strict consistency guarantees. Low latency, correctness, performance, and security are not things we optimise for later. They are design constraints from day one.

We are looking for software engineers who want to work close to the core of the platform: backend services, event-driven systems, databases, and performance-critical product flows.

Our Benefits Are

• Competitive pension, health and medical insurance
• 30 paid vacation days
• Fitness benefit (Friskvårdsbidrag)
• Professional growth
• Sport activities, parties, team buildings

This is a 100% on-site position.

Based in Stockholm, Sweden.