Senior Software Engineer — AI Integration & Modernization

Jonas Software; Tampere; On-site; EUR 105,000 - 158,000; Full time

Job summary

Jonas Software is seeking a Senior Software Engineer to own the design and delivery of production AI capabilities across a broad portfolio of software businesses. You will work with product and engineering leaders to translate challenges into reliable, scalable AI solutions and shape reusable patterns for organization-wide AI adoption.

This role offers high autonomy across diverse environments, evolving from legacy to cloud systems, and the opportunity to influence Jonas’s emerging AI strategy

Qualifications

• 5+ years of experience building and operating production software systems.
• Experience designing and integrating APIs, working with databases, and developing distributed systems.
• Exposure to AI/LLM-based systems and AI integration in production environments.
• Ability to work across backend, frontend, cloud, and AI integrations.
• Clear communication with both technical and non-technical stakeholders.

Responsibilities

• Lead discovery with business units to understand workflows and translate needs into technical designs.
• Design and build AI-enabled systems and full-stack components including APIs, data pipelines, and user interfaces.
• Deliver end-to-end implementations from prototype to production deployment with measurable business impact.
• Implement modernization upgrades to enable AI integration across legacy and modern platforms.
• Monitor and optimize AI features for performance, latency, and cost.

Skills

Production software experience

API design

LLM integration

Full-stack

Communication

Ownership mindset

Cloud infrastructure

Job description

Jonas Software is seeking a Senior Software Engineer to own the design and delivery of production AI capabilities across a broad portfolio of software businesses. You will work with product and engineering leaders to translate challenges into reliable, scalable AI solutions and shape reusable patterns for organization-wide AI adoption.

This role offers high autonomy across diverse environments, evolving from legacy to cloud systems, and the opportunity to influence Jonas’s emerging AI strategy