Senior Backend Engineer

Truesec; Stockholms kommun; On-site; SEK 900,000 - 1,300,000; Full time

Job summary

Truesec is seeking a Senior Backend Engineer to join our Engineering Team in Stockholm. You will design, build, and maintain backend services that power our unified platform, focusing on performance, security, and reliable APIs.

You will collaborate with frontend teams, document specs, mentor peers, and drive best practices in a fast-paced cybersecurity environment. Proficiency in Python and C#, Azure, and API design is essential.

Qualifications

• Extensive experience in a similar backend role.
• Proficient in Python and C# with OO design.
• Strong API development and security focus.
• Experience with Azure services and databases (SQL/NoSQL).
• Familiarity with ASP .Net Core and Git workflows.
• Experience in Agile teams and ceremonies.

Responsibilities

• Design, develop and maintain backend infrastructure and services.
• Build scalable, secure backend solutions for internal tools and platforms.
• Optimize performance and document technical specifications.
• Mentor other team members and promote best practices.

Skills

Python

C#

Object-oriented programming

API development

Agile methodologies

RESTful APIs design

Security best practices

Tools

Azure

ASP .Net Core

SQL/NoSQL databases

xUnit testing

Git

Job description

Do you want to be at the forefront of protecting our society against cyber threats? We are looking for a Senior Backend Engineer to team up with the most dedicated team of developers in our Engineering Team.

About Truesec – A Leading Cybersecurity Company

Since 2005, Truesec has been a native cybersecurity company, driven by one single purpose: Creating safety and sustainability in a digital world by preventing cyber breach and minimizing impact. Over the years, we’ve earned the trust of organizations worldwide and gained a strong reputation internationally. Our team consists of dedicated specialists covering the entire spectrum of cybersecurity – with capabilities in Predict, Prevent, Protect, Respond, and Recover. Today, we employ around 350 employees – and as cybercrime grows, we need to grow. To support that goal, we are now looking for a Senior Backend Engineer who wants to make a difference in our Truesec Engineering Team.

Truesec Technology Organization

This technology business unit at Truesec brings together highly skilled engineers, architects, platform specialists and IT specialist with a mission to develop, operate, and continuously improve our unified Truesec Platform and technical capabilities. The Engineering Team drives the adoption of AI, automation, and advanced technology across all business units, ensuring we deliver best-in-class cybersecurity solutions to our clients and maintain a robust, scalable, and secure technology stack.

The Role

As a Senior Backend Engineer, you will be integral to the Truesec engineering team, responsible for designing, developing, and maintaining the backend infrastructure of our internal tools and platform. You will create scalable and secure backend solutions that meet performance requirements while collaborating with cross-functional teams to ensure seamless integration with frontend components. Your role involves optimizing performance, documenting technical specifications, and mentoring other team members.

Your Potential Background

• Experience: Extensive experience in a similar role.
• Technical Skills: Proficient in Python and C#, with strong knowledge of object-oriented programming. Experience with relational (SQL) and NoSQL databases, API development, and backend frameworks such as ASP .Net Core.
• Cloud Proficiency: Familiarity with Azure services, including Azure App Services, Functions, and SQL Database.
• Version Control: Skilled in using Git for version control, including branching and merging.
• Agile Methodologies: Experience working in Agile teams and facilitating agile ceremonies.

Required Skills:

• Strong understanding of database management, including design and query optimization.
• Experience in designing and securing RESTful APIs, including authentication mechanisms (e.g., JWT, OAuth).
• Proficiency in testing frameworks (e.g., xUnit) and debugging tools.
• Ability to create clean, maintainable code while adhering to best practices and coding standards.
• Strong analytical and problem-solving skills, with a focus on performance optimization and security best practices.
• Experience with AI and automation in business-critical environments

Bonus Skills:

• Experience with API documentation and creating architecture diagrams.
• Knowledge of security principles and practices, including data encryption and protection against common threats.
• Ability to facilitate team meetings and agile ceremonies effectively.
• A proactive attitude towards continuous learning and sharing knowledge with team members.

Due to the sensitivity in our assignments, we require Swedish citizenship, citizenship in an EU country, or a Swedish work permit.

Join Our Mission Toward a Safe Digital Future

If you truly want to make a difference and make our world a little bit safer, this is the place for you. At Truesec, you'll get to be at the forefront of fighting cybercrime instead of reading about it in the news. This is your chance to be part of an exciting journey in a leading cybersecurity company - and learn from some of the best in their field.

So, are you ready to team up with the most dedicated team of experts and be part of a meaningful mission? Then we are excited to get to know you!