Senior Software Engineer (C++/C)

Posted Yesterday
Be an Early Applicant
2 Locations
In-Office
Senior level
Kids + Family • Retail • Robotics
The Role
Designs, develops, optimizes, and maintains high-performance core engines and software platforms for technology-enabled play experiences. Responsibilities include hands-on implementation, testing, debugging, performance optimization, architecture decisions, code reviews, automated testing, documentation, continuous integration, and collaboration with software, firmware, and systems architecture teams.
Summary Generated by Built In

Job Description

Expert in building game play features and developing engine tech?  

Then get your application ready, we're looking for you! 

Play Software drives technology enabled play; where LEGO play sets are combined with electronic hardware and software to build a Play experience. 

As part of the Play Experience team, you will be a central part of the Play Software organization as we drive to bring advanced technology in-house, working across all technical teams, while always focusing on the experience of LEGO fans of all ages. 

Responsibilities 

We are looking for a Senior Software Engineer with strong expertise in designing and building high-performance core engines and software platforms. You will design and develop software components that enables the teams to create engaging play experiences using physical capabilities such as motion, sound and colour detection. Through robust and reusable software, you will help bring our tech-enabled toys to life. 

You will take ownership of key engine components, solve complex challenges in the system. Work closely with Lead Engineer and other stakeholders, you will help establish a robust and maintainable foundation for future capabilities. 

  • Design, implement, maintain and optimize core engine through software components. 
  • Take ownership of complex technical challenges, hands-on in implementation, testing and resolving issues across the platform stack.  
  • Optimise performance, resource utilisation and reliability in constrained systems, identifying bottlenecks and challenges, and implementing effective solutions. 
  • Contribute to technical design discussions, evaluate implementation trade-offs and recommend improvements to the architecture and software components. 
  • Maintain high engineering standards through code reviews, automated testing, documentation and continues integration practices.  
  • Collaborate closely with Engineering Leads and System Architects from the Software and Firmware domains to ensure your work is optimized and efficient on physical platforms. 
  • Identify opportunities to improve engineering processes, development workflows to enhance team efficiency and software quality 

Requirements 

  • Strong software engineering experience in developing complex system, core platforms, frameworks or engines.  
  • Demonstrated ability to analyse complex technical problems, make engineering trade-offs and communicate decisions clearly.  
  • Strong software development skills, fluent in C++/C. 
  • Experience with Domain Specific Languages (DSL). 
  • Demonstrated track record of successfully delivering engineering projects within team, achieving objectives and milestones. 
  • Demonstrate ability to balance user experience and technical constraints to deliver effective solutions.  
  • Experience in using task management software like Jira. 
  • Experience using GitHub for code management. 

Nice to have: 

  • Experience with connected toys, wearables, IoT or other hardware-software products (BLE, NFC/RFID, sensors, low-power devices). 
  • Experience with game engines (Unity, Unreal, Godot) and building designer-facing tools and data-driven content pipelines. 
  • Audio programming or interactive sound design experience. 
  • Experience designing play for children, including playtesting with kids and working within child safety and privacy regulations. 
  • A passion for LEGO play and a curiosity for inventing new forms of play. 

Applications are reviewed on an ongoing basis. However, please note we do amend or withdraw our jobs and reserve the right to do so at any time, including prior to any advertised closing date. So, if you're interested in this role we encourage you to apply as soon as possible.

What’s in it for you?


Here is what you can expect:


Family Care Leave - We offer enhanced paid leave options for those important times.


Insurances – All colleagues are covered by our life and disability insurance which provides protection and peace of mind.


Wellbeing - We want our people to feel well and thrive. We offer resources and benefits to nurture physical and mental wellbeing along with opportunities to build community and inspire creativity.


Colleague Discount – We know you'll love to build, so from day 1 you will qualify for our generous colleague discount.


Bonus - We do our best work to succeed together. When goals are reached and if eligible, you'll be rewarded through our bonus scheme.


Your workplace: Your workplace will be the office, store or factory specified in this advert.


Hybrid Working: Our hybrid work model, Best of Both offers you the option of flexibility to work from home up to two days per week. Your People Leader will discuss the principles of the model, including how this option applies to your role and team.

Learn more about our benefits, culture and workplace experience here


Children are our role models. Their curiosity, creativity and imagination inspire everything we do. We strive to create a diverse, dynamic and inclusive culture of play at the LEGO Group, where everyone feels safe, valued and they belong.


The LEGO Group is highly committed to equal employment opportunity and equal pay and seeks to encourage applicants from all backgrounds (eg. sex, gender identity or expression, race/ethnicity, national origin, sexual orientation, disability, age and religion) to apply for roles in our team.


The LEGO Group is fully committed to Children’s Rights and Child Wellbeing across the globe. Candidates offered positions with high engagement with children are required to take part in Child Safeguarding Background Screening, as a condition of the offer.


Thank you for sharing our global commitment to Children’s Rights.


Just imagine building your dream career.

Then make it real.

Join the LEGO® team today.


Skills Required

  • Strong software engineering experience developing complex systems, core platforms, frameworks, or engines
  • Ability to analyze complex technical problems, make engineering trade-offs, and communicate decisions clearly
  • Strong software development skills and fluency in C++ and C
  • Experience with Domain-Specific Languages
  • Track record of delivering engineering projects within a team and achieving objectives and milestones
  • Ability to balance user experience and technical constraints to deliver effective solutions
  • Experience using task management software such as Jira
  • Experience using GitHub for code management
  • Experience with connected toys, wearables, IoT, or hardware-software products, including BLE, NFC/RFID, sensors, or low-power devices
  • Experience with Unity, Unreal, or Godot game engines and designer-facing tools or data-driven content pipelines
  • Audio programming or interactive sound design experience
  • Experience designing play for children, including playtesting and child safety and privacy regulations
  • Passion for LEGO play and curiosity about inventing new forms of play

The LEGO Group Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about The LEGO Group and has not been reviewed or approved by The LEGO Group.

  • Fair & Transparent Compensation — Pay is generally positioned as competitive across many roles and markets, with benchmarking against local markets and an expressed commitment to equal pay. Total compensation is often framed as stronger when considering the full package rather than base salary alone.
  • Parental & Family Support — Paid parental leave is described as notably expansive, with substantial fully paid time for primary and secondary caregivers and additional paid caregiver leave. Leave is also described as continuing to accrue other rewards such as vacation and bonus eligibility during the leave period.
  • Wellbeing & Lifestyle Benefits — Benefits are described as extending beyond core insurance into mental health and wellbeing support, including assistance programs, mindfulness resources, ergonomic setups, and fitness-related offerings. Brand-specific lifestyle perks such as sizable product discounts are highlighted as a meaningful part of the overall rewards experience.

The LEGO Group Insights

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The Company
HQ: Billund
19,827 Employees
Year Founded: 1932

What We Do

We are the LEGO Group, the company behind the world’s most loved LEGO® bricks. Our brand name derived from the two Danish words Leg Godt, which mean “Play Well”. We’ve been sparking imaginations and inspiring the builders of tomorrow since 1932. This is our mission and what motivates our colleagues around the world every day. Today, we remain proudly family-owned with headquarters in Billund, Denmark. We have regional hubs in Boston, USA; London, UK; Shanghai, China; and Singapore, as well as 7 manufacturing facilities around the world. These places are home to 28,000+ colleagues in everything from design and engineering to digital technology and marketing. Together we learn, imagine and build – creating play experiences that are sold in over 130 countries worldwide. A purposeful and responsible global brand where creativity helps to inspire builders all around the world. Just imagine being part of that!

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