Senior SharePoint Developer

Inuits; Kraków; On-site; PLN 180,000 - 260,000; Full time

Job summary

Inuits Sp. z o.o. is seeking two Senior SharePoint Developers to take over and further develop enterprise on-premises SharePoint applications for a European public institution in Warsaw.

You will work with a mature codebase and collaborate with business stakeholders in a Scrum environment. The role requires hands-on expertise with SharePoint Server 2019 / Subscription Edition, SPFx, React, TypeScript and PnPjs, plus strong .NET/C# Web APIs, IIS and SQL Server.

Qualifications

• Bachelor's degree or 3 years of higher education.
• Minimum 6 years of IT experience, including at least 3 years as a Software Developer.
• Proven experience developing enterprise applications on SharePoint on-premises (2019 / Subscription Edition) with SPFx, React/TypeScript and PnPjs.
• Strong experience with .NET/C# Web APIs, IIS and SQL Server.
• Experience with Azure DevOps (Boards, Repos with pull request workflow, Pipelines).
• Experience integrating applications with identity providers and external systems (SAML, Entra ID, REST APIs).
• Knowledge of UML and experience designing data, business logic and UI layers.
• At least one full solution lifecycle completed in a Scrum environment.
• Ability to lead technical work within a team.
• An advanced level certificate in software development (or an internationally recognised equivalent).
• Experience with EU institutions or the public sector is a plus.
• Availability to start in mid-November 2026.
• Very good English (minimum B2).
• EU citizenship and own business activity (B2B).
• Living within 2 hours' drive of Warsaw.

Responsibilities

• Develop and maintain SharePoint on-premises solutions using SPFx, React, TypeScript and PnPjs;
• Build and maintain custom Web APIs in .NET/C# hosted on IIS, with SQL Server;
• Take over an existing third-party codebase through code review, refactoring, technical debt management and regression testing;
• Integrate applications with identity and external systems (EU Login, SAML, Entra ID, REST APIs, notifications, document management);
• Optimize the performance, security and quality of list-based SharePoint solutions;
• Translate requirements into technical design, using UML where needed;
• Estimate effort, take part in backlog refinement and acceptance with business owners, analysts and testers;
• Guide technical work within the team, including code reviews and development standards;
• Produce technical documentation and manage configuration and releases;
• Act as 2nd and 3rd line support.

Skills

SharePoint on-premises

SPFx

React

TypeScript

PnPjs

-.NET/C# Web APIs

IIS

SQL Server

Azure DevOps

SAML

Entra ID

REST APIs

UML

Scrum

Education

Bachelor's degree (or 3 years of higher education)

Tools

Azure DevOps (Boards, Repos, Pipelines)

IIS

SQL Server

Job description

We are looking for two Senior SharePoint Developers to take over and further develop enterprise applications built on SharePoint on-premises for a European public institution in Warsaw. This role suits a mature, experienced engineer who is comfortable working with an existing codebase and working directly with business stakeholders.

About the Project:

The client runs a set of line-of-business applications built on SharePoint Server (2019 / Subscription Edition), with custom SPFx components and .NET Web APIs behind them. The applications were built by a third-party vendor, and the new team will take over the codebase from them. There is a knowledge transfer period in November 2026, overlapping the current contractor's last sprints. You will join a Scrum team that works in Azure DevOps, alongside business owners, analysts and testers. The assignment is long term.

Responsibilities:

• Develop and maintain SharePoint on-premises solutions using SPFx, React, TypeScript and PnPjs;
• Build and maintain custom Web APIs in .NET/C# hosted on IIS, with SQL Server;
• Take over an existing third-party codebase through code review, refactoring, technical debt management and regression testing;
• Integrate applications with identity and external systems (EU Login, SAML, Entra ID, REST APIs, notifications, document management);
• Optimize the performance, security and quality of list-based SharePoint solutions;
• Translate requirements into technical design, using UML where needed;
• Estimate effort, take part in backlog refinement and acceptance with business owners, analysts and testers;
• Guide technical work within the team, including code reviews and development standards;
• Produce technical documentation and manage configuration and releases;
• Act as 2nd and 3rd line support.

Qualifications:

• Bachelor's degree (or 3 years of higher education);
• Minimum 6 years of IT experience, including at least 3 years as a Software Developer;
• Proven experience developing enterprise applications on SharePoint on-premises (2019 / Subscription Edition) with SPFx, React/TypeScript and PnPjs;
• Strong experience with .NET/C# Web APIs, IIS and SQL Server;
• Experience with Azure DevOps (Boards, Repos with pull request workflow, Pipelines);
• Experience integrating applications with identity providers and external systems (SAML, Entra ID, REST APIs);
• Knowledge of UML and experience designing data, business logic and UI layers;
• At least one full solution lifecycle completed in a Scrum environment;
• Ability to lead technical work within a team;
• An advanced level certificate in software development (or an internationally recognised equivalent);
• Experience with EU institutions or the public sector is a plus;
• Availability to start in mid-November 2026;
• Very good English (minimum B2);
• EU citizenship and own business activity (B2B);
• Living within 2 hours' drive of Warsaw.

Recruitment Process:

• Initial interview with our recruitment team;
• Technical interview with the client;
• Final decision and offer.

Inuits Sp. z o.o. is registered in the National Register of Employment Agencies (KRAZ) under number 35420.