.NET Developer

Reporting to:

Director Of Software Engineering

Kallidus is a leading SaaS provider of learning, performance, and talent management solutions. Our award-winning platform helps hundreds of organisations worldwide empower their people to perform at their best — from simplifying compliance to driving skills development and measurable business outcomes.

We are a technology company, not just a company that "does technology". We build it ourselves, we own it entirely, and the people who lead that work have real influence over how it evolves. Come build, grow and make a difference!

The Role:

This is an excellent opportunity for a developer who enjoys designing and building robust backend services, APIs, and integrations that power large-scale SaaS applications.

You’ll work as part of a collaborative Agile team, contributing to the development of new features, enhancing existing products, and helping to deliver high-quality software that supports our customers around the globe.

We’re particularly interested in developers who have a strong background in designing, building, and maintaining RESTful Web APIs and who understand how modern distributed applications communicate and scale.

This role can be based out of either our

Bristol HQ

or our new AI Hub

in

Lisbon !

Key Responsibilities:

Design, develop, and maintain scalable .NET applications and services

Build and enhance high-performance

RESTful Web APIs

that support our SaaS platform

Collaborate with Product, QA, and Engineering teams to translate requirements into technical solutions

Participate in architecture discussions and contribute to technical design decisions

Write clean, maintainable, and testable code following industry best practices

Develop and maintain integrations with internal and third-party systems through APIs

Support the deployment, monitoring, and continuous improvement of applications

Troubleshoot, debug, and resolve production issues

Refactor and optimise existing systems to improve performance and maintainability

Contribute to code reviews and promote engineering excellence within the team

Create and maintain technical documentation throughout the software development lifecycle

Ensure solutions align with security, scalability, and reliability standards

Required Skills, Experience and Behaviours

Commercial experience as a .NET Developer, Software Developer, or Application Developer

Strong experience building and maintaining

RESTful Web APIs

using .NET and C#

Excellent knowledge of

ASP.NET Core Web API

Solid understanding of API design principles, versioning, authentication, and security best practices

Experience working with

SQL Server

and relational database design

Experience consuming and integrating third-party APIs and services

Knowledge of architectural patterns and modern software design principles

Familiarity with API-driven and microservices-based architectures

Understanding of HTTP, JSON, REST, and modern web technologies

Experience working within Agile development environments

Strong problem-solving and troubleshooting skills

Excellent communication and collaboration skills

High attention to detail and commitment to code quality

Experience with

Azure

and cloud-native application development

Exposure to containerisation technologies such as

Docker

Experience with CI/CD pipelines and DevOps practices

Knowledge of event-driven architectures and messaging technologies

Experience with API gateways and service integrations

Exposure to learning technology, HR technology, or workforce analytics platforms

Previous experience working within a SaaS or product-led organisation

Understanding of performance optimisation and scalable distributed systems

What we offer:

27 days of annual leave

Full tech setup

Support for your ongoing growth & development

Enhanced Family Leave

Flexible, hybrid approach to work

Our people are the heart of our success, and diversity is what drives that. Kallidus positively encourages applications from suitably qualified and eligible candidates regardless of sex, race, disability, age, sexual orientation, gender reassignment, region or belief, marital status, pregnancy or maternity.

Diversity brings innovation and creativity through different views, backgrounds, and opinions; as a people-first organisation, it’s crucial that our teams reflect global diversity.

Kallidus is a proud member of the Disability Confident Employer scheme. We work hard to build an explicitly inclusive space where everybody belongs. Kallidus is a supportive, caring, and enjoyable working environment for all our people, and we are committed to furthering the diversity of our teams.

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