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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