Software Engineer - Backend Platform

Evolution AB; Stockholms kommun; On-site; SEK 450,000 - 600,000; Full time

Benefits offered by this job

Competitive pension

Health and medical insurance

30 paid vacation days

Fitness benefit (Friskvårdsbidrag)

Professional growth opportunities

Job summary

Evolution AB is seeking a software engineer to help build a new platform from first principles in Stockholm, Sweden. The role emphasizes developing backend services and components using cutting-edge technologies with a focus on performance and security. Candidates should be self-driven and motivated to grow within a high-performing team.

You'll work with Java, Spring Boot, PostgreSQL, and Kafka as you design and implement robust and efficient systems.

Qualifications

• Strong fundamentals in computer science are essential.
• Comfortable working with backend systems and databases.
• Ambition to grow in a high-performing engineering environment.

Responsibilities

• Build backend services and platform components using Java and Spring Boot.
• Design and implement APIs and data models.
• Participate in code reviews and technical decisions.

Skills

Strong computer science fundamentals

Backend systems and databases

Distributed systems

Event-driven architecture

Performance, correctness

Education

Degree in Computer Science or related field

Tools

Java

Spring Boot

Kafka

PostgreSQL

Docker

Job description

Job Description

We are 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’ll build will operate across regions and process thousands of real‑money transactions per second with strict consistency guarantees. Low latency, correctness, performance, and security 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.

What You'll Work With

• 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 engineering
• You 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

Benefits

• 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.