30.09.2026

Senior Software Developer

.NET, SQL, AI Driven

AI ROOTS DATA CASE

Join the product development organization behind an established business-software product, working alongside its existing team as an external developer on a focused, project-based engagement.

Start

15.10.2026, ASAP

Duration

3 months

Location

Helsinki, Hybrid, remote

Allocation

100%

In this role, you will:

Develop and maintain product functionality using VB.NET/.NET Framework alongside modern C# on .NET Standard 2.0 / .NET 8+, working across both legacy and current parts of the codebase.
Work with SQL for data access and logic, and HTML, CSS, and JavaScript on the front end.
Apply AI-native development methods and practices as part of day-to-day work, using the AI tooling the client provides.
Support and coach more junior team members as a senior presence on the team, not just as an individual contributor.
Collaborate closely and communicate effectively as part of an established product team, getting things done efficiently.
Work primarily remotely, with occasional in-person meetings at the client's Helsinki or Lappeenranta office (travel expensed).

You will thrive if:

You're a senior developer with strong, hands-on experience across VB.NET/.NET Framework and modern C#/.NET (Standard 2.0 and/or .NET 8+), comfortable moving between both.
You have solid SQL skills and working knowledge of HTML, CSS, and JavaScript.
You have real experience with AI-native/AI-assisted development methods, not just familiarity with the concept.
You're an effective communicator and team player who can support and mentor less experienced developers.
Prior experience with payroll/HR functionality or financial management software is a plus, though not required.
You're fluent in both Finnish and English.
You can start around mid-October and commit to an initial ~2–3 month engagement (suggested period mid-October through year-end).

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