Full-Time

Senior Manager Development

.NET

Posted on 12/13/2025

Jonas Software

Jonas Software

1,001-5,000 employees

Long-term ownership of vertical software

No salary listed

Markham, ON, Canada

In Person

Category
Engineering Management (1)
Requirements
  • 8+ years of software development experience, with at least 3 years in a leadership or managerial role.
  • Expert in the Microsoft technology stack
  • Experience modernizing a legacy platform and delivering high-quality software solutions at scale.
  • .NET Core, C#, Blazor or React
  • SQL Server
  • Strong knowledge of software architecture, performance tuning, and security best practices.
  • Experience working in Agile/Scrum environments.
  • Excellent communication, collaboration, and organizational skills.
  • Solid sense of personal responsibility and ability to stand alone
  • Customer focused approach to accomplishing tasks within established timelines and proactively ensure customers’ expectations are met
  • Bachelor's or Master’s degree in Computer Science, Engineering, or a related field.
Responsibilities
  • Building and managing a high-performing team of software developers with a mandate of transitioning from monolithic thick client to full-stack web applications.
  • Own the end-to-end development lifecycle: requirements gathering, design, development, testing, deployment, and maintenance.
  • Architect scalable solutions using the Microsoft technology stack, including Blazor/React, .NET Core, C#, Azure, and SQL Server.
  • Collaborate with Product Management and UX to define project requirements, prioritize features, and deliver world-class user experiences.
  • Ensure secure coding practices, performance optimization, and compliance with data privacy and security standards.
  • Mentor and coach engineers, conduct code reviews, and support career development for team members.
  • Manage vendor relationships and evaluate external tools or partners when necessary.
  • Setting Objectives and SMART Goals
  • Monitor KPIs, deliver project milestones on time and on budget, and report progress to senior leadership.
  • Driving ownership culture within the team.
Desired Qualifications
  • Prior experience in private club or hospitality industries is a plus.
  • Experience working in a high-paced software firm wearing multiple hats

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

Simplify Jobs

Simplify's Take

What believers are saying

  • Acquired Aava Software in 2025 to expand ERP and MES in manufacturing.
  • Grew to 200+ companies by 2025 through accelerated acquisitions like Wheatley and OnTap Data.
  • Parent Constellation Software offers $5B revenue and 30,000 employees for global scale.

What critics are saying

  • EU regulators force Constellation divestiture of Jonas in 12-24 months over antitrust.
  • Sage Group erodes 15-20% UK market share from Wheatley and Rock Solid by Q1 2026.
  • Vicinity Software captures 30% ANZ winery market from Ezy Systems in 6-12 months.

What makes Jonas Software unique

  • Jonas Software maintains decentralized portfolio of 200+ autonomous VMS companies across 40+ verticals.
  • Buy-and-hold-forever strategy ensures no resales since 2003 acquisitions.
  • Provides financial security and strategic guidance while preserving brands and management.

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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.

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