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Jonas Software

Long-term ownership of vertical software

Senior Software Engineer - AI Integration & Modernization

Full-TimeUpdated on 10/21/2026
CA$120k - CA$130k
Senior
Markham, ON, Canada
In Person
Software EngineeringAI Application Engineering

About the job

Requirements
  • At least 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 such as prompt orchestration, retrieval-augmented workflows, embeddings, or similar production use cases.
  • Ability to work across the full stack, including backend services, front-end components, cloud infrastructure, and AI integrations.
  • Comfort and experience leveraging AI coding agents in the software development lifecycle across both greenfield and brownfield contexts.
  • Include a brief description of one project built on your own time and the problem it solved; applications without this will not be considered.
Responsibilities
  • Lead discovery with business units to understand workflows, identify high-value opportunities, and translate needs into clear technical solution designs.
  • Design and build AI-enabled systems and full-stack components, including APIs, integrations, data pipelines, retrieval systems, and user-facing interfaces.
  • Deliver end-to-end implementations from prototype through production deployment, ensuring successful rollout, user adoption, and measurable business impact.
  • Implement modernization upgrades such as API layers, authentication improvements, asynchronous processing, and cloud services to enable AI integration across diverse legacy and modern platforms.
  • Diagnose, evaluate, and optimize AI features and supporting systems by monitoring performance, accuracy, latency, reliability, and cost efficiency.
  • Build solutions that integrate with existing business-unit systems, including SaaS products, on-premises platforms, ERPs, and CRMs, resolving complex issues across back-end services, data flows, and LLM operations.
  • Turn one-off solutions into reusable components, templates, and patterns to make it easier to roll out AI capabilities across additional business units.
  • Help develop playbooks and provide training so business units can take ownership of AI solutions before moving on to new projects.

About the company

Jonas Software manages a decentralized portfolio of over 160 independent software companies across 40 different industries. The company operates by acquiring niche software businesses and providing them with financial security and strategic guidance while allowing them to keep their original branding and management teams. Unlike competitors that often restructure or resell their acquisitions, Jonas uses a "buy-and-hold-forever" strategy to ensure long-term stability for its brands. Its goal is to foster growth within specific vertical markets by maintaining a permanent home for specialized software businesses.

Company Size

1,001-5,000

Company Stage

N/A

Total Funding

N/A

Headquarters

Toronto, Canada

Founded

1990

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Simplify's Take

What believers are saying

  • 2026 brought Delineate, Magnusmode, and Finastra's banking assets into Jonas.
  • Jonas said 2025 mid-year review added 10 acquisitions and expanded nine verticals.
  • Aava Software joined Jonas Europe in August 2025, deepening ERP and MES exposure.

What critics are saying

  • If Constellation's acquisition machine stalls in 2026-2027, Jonas becomes a low-growth holdco.
  • Adheris Health's 2025 ANZ sale shows sellers can reprice or delay Jonas transactions.
  • Decentralized brands invite duplicated roadmaps, uneven execution, and margin leakage across 200+ brands.

What makes Jonas Software unique

  • Since 2003, Jonas has never sold an acquired company, signaling permanent ownership.
  • Jonas runs 200+ independently managed software brands across 40+ vertical markets.
  • Vesta, CORA, and Vertus keep local brands, teams, and customer relationships intact.

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Benefits

  • Remote Work Options
  • Flexible Work Hours

Company News

Jonas Software
Aug 22nd, 2025
Jonas Europe Acquires Aava Software

Jonas Europe has acquired Aava Ohjelmistot Oy, a leading developer of ERP and MES solutions for manufacturing and logistics. Aava Software, known for its low-code platform, aims to enhance its growth by leveraging Jonas's sales and marketing expertise. This acquisition marks a new phase for Aava, with plans to expand as a major ERP and MES provider.

Jonas Software
Jul 30th, 2025
Jonas Software ANZ Acquires RxOne

Jonas Software ANZ has acquired RxOne, a key provider of pharmacy management software in New Zealand. This acquisition enhances Jonas's presence in the pharmacy and healthcare technology sector. RxOne will continue to operate independently, maintaining its team and focus on innovation and customer service. Jeff McKee, CEO of Jonas Software ANZ, expressed excitement about supporting RxOne's growth, while RxOne's founder, Margie Peat, highlighted the benefits of joining Jonas.

Jonas Software
Jul 28th, 2025
Jonas Software ANZ Acquires MedAdvisor Solutions' ANZ Business

Jonas Software ANZ acquires MedAdvisor Solutions' ANZ business.

Jonas Software
May 1st, 2025
Jonas Europe Acquires Wheatley Software Solutions | Jonas Software UK & Europe

Wallingford, Oxfordshire, April 28th, 2025 – Jonas Europe (“Jonas”) is pleased to announce the acquisition of Wheatley Software Solutions.

Jonas Software
Dec 19th, 2024
Jonas Software Announces Acquisition of OnTap Data - Jonas Software

OnTap Data is a leading provider of data analytics and insights solutions tailored for the liquor, hospitality, and retail sectors.