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Senior Software Engineer - Complex Systems & High-Performance Infrastructure

  • 12 maj 2026

Are you interested in difficult technical problems and systems built close to the fundamentals of software engineering? At Nexitec, you will work on large-scale real-time systems involving high transaction volumes, complex financial calculations, distributed infrastructure, hardware integration, and regulatory requirements across more than 20 countries. The environment places high demands on robustness, performance, and deep technical understanding.

ABOUT NEXITEC

Nexitec develops large-scale software and infrastructure for the sports betting industry, with a strong focus on real-time systems, transaction processing, analytics, and operational reliability.

Their platform handles everything from live betting and financial calculations to terminal infrastructure, data processing, compliance, and real-time analytics across multiple international markets. A major part of the work involves building highly efficient and robust systems from the ground up, with full control over architecture, infrastructure, and core technology.

ABOUT THE ROLE

We are not primarily looking for experience with a specific framework or trendy tech stack. What matters most is strong problem-solving ability, curiosity, analytical thinking, and the capacity to quickly understand complex systems and domains.

This is an environment for engineers who enjoy learning difficult things, solving challenging problems from first principles, and building systems with long-term quality and performance in mind.

ABOUT YOU

    Strong analytical and problem-solving skills

    Ability to understand and work with complex systems and specifications

    Interest in low-level and high-level software design

    Capacity adapting and learning difficult things quickly

    Enjoy building systems from first principles rather than assembling pre-built solutions

    Curiosity around architecture, performance, concurrency, infrastructure, and system behaviour

TECH STACK

    Custom database and async runtime

    Linux-based infrastructure

    WebAssembly

    Real-time systems

    Python for modelling and prototyping

    Statistical and ML-driven systems

    Custom-built tooling with minimal external dependencies

There is a strong engineering culture focused on simplicity, auditability, robustness, performance, and deep technical understanding.

WHO TENDS TO THRIVE HERE?

People who enjoy:

    Reading specifications and understanding systems deeply

    High ownership and technical responsibility

    Small teams with strong engineering focus

    Building things properly rather than quickly patching problems

    Working close to architecture, infrastructure, and core logic

    Continuous learning and technical growth

    Location and setup are flexible depending on candidate and role.

APPLY

Want to hear more? Click “Sök jobbet” below to apply. In this recruitment Nexitec is working with Skills & Talent AB. For further information or questions, please contact Recruitment Consultant Eric Öholm at eric@skillsandtalent.se or Alexander Nistad at alexander@skillsandtalent.se

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