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Senior Frontend Engineer – 3D / Three.js

About the Role

We are looking for a Senior Frontend Engineer with strong experience in 3D web technologies to join a cross functional product team building interactive experiences used by millions of users worldwide.

In this role, you will help design and implement high performance 3D experiences for web and mobile environments, contributing to the development of avatar systems and interactive building experiences. You will collaborate closely with product managers, UX designers, and engineers to deliver engaging and performant solutions across a wide range of devices.

This is an opportunity to work on complex rendering challenges, performance optimization, and scalable frontend architecture in a creative product environment.

 

Team setup

  • The team has a cross-functional constellation that includes 1 product manager, 2 UX-designers, and 4 engineers.
  • The team has a strong focus on a tight collaboration between product, design, and engineering in nearly all phases of the development cycle.

 

Key Responsibilities

  • Architect and implement Three.js-based 3D scenes, including lighting, shading, rendering pipelines, and camera systems
  • Develop and improve 3D avatar and interactive building experiences used in web and mobile applications
  • Optimize rendering performance across a wide range of devices, including low-end mobile hardware
  • Identify and resolve performance bottlenecks, memory issues, and rendering inefficiencies
  • Collaborate closely with product managers and UX designers to translate concepts into high-quality technical solutions
  • Maintain high engineering standards through code reviews, testing, and best practices
  • Contribute to technical documentation and developer guides to support team knowledge sharing and onboarding
  • Design and maintain reusable components or libraries used across multiple teams

 

Mandatory Skills

Hard skills:

  • 6+ years of professional experience
  • Three.js / React Three Fiber (R3F)
  • 3D graphics concepts: scene composition, shadow mapping, camera systems, mesh loading (glTF/GLB/FBX)
  • React 
  • TypeScript
  • Git: including conventional commits, branch-based PR workflow with Jira references
  • Unit and integration testing with Vitest & React Testing Library
  • Proficiency in integrating AI-powered tooling into your day-to-day development workflow

Soft skills:

  • Ability to work on a library consumed by other teams thinking about API surface, breaking changes, and versioning
  • Comfort working in an early-stage codebase where patterns are still being established
  • Ability to work colaborate closely with design and product to understand the problem space and explore the best solutions
  • Be comfortable in sharing your experience and expertice with the team

Optional / nice-to-have-skills:

  • 3D Math & Spatial Reasoning
  • GLSL / Shader Programming
  • GSAP animation library
  • npm/Node.js: workspaces, package publishing, dependency management

 

Why join

  • Hybrid/ remote-friendly role with flexible collaboration across the team
  • Build playful 3D digital experiences enjoyed by millions of users globally
  • Work on products that bring creativity and imagination into the digital world
  • Solve complex challenges in 3D rendering and interactive graphics
  • Join a small, highly collaborative team shaping the future of creative digital play

 

relocation package
competitive compensation packages
flexible working hours
job rotation
performance bonuses
learning through Arnia Academy
attractive projects
trainings
international work experience
referral program
medical benefits
about-us-background

At Arnia, we are a diverse and passionate team of software development engineers, quality assurance engineers, business analysts, system administrators, and managers, united by our shared dedication to creating high-quality software solutions and delivering exceptional services to our valued customers and partners.

We believe in customer satisfaction as being the single most important goal we want to achieve in everything we do. But we also believe that we can reach this goal while having fun at work, making friends, and enjoying working together. We have game evenings, nights out and team building events to help us know each other better and spend quality time together. Also, we have a flat organization, with no unnecessary hierarchies and where you reach the management easily.

In Arnia you will meet very skilled software engineers with rich academicals background, with passion for innovation and continuous education, self-driven and oriented toward results. At the same time, they are people with high sense of humour, fun and informal, that value friendship, trust and a nice working environment.

Excellence is achieved step by step, it is a journey we always take together as a team and as a modern organization.

We recognize the value of each individual, we value diversity and we support your development career – your success is our success! We take pride in helping our people to develop their career, continuously improving their skills and their technical knowledge and to fully reach their own development goals.

about-us-background

People are different, they are coming from various cultures and are motivated by different things:

  • The financial interests
  • The career development plan
  • The technologies and the projects
  • The work-life balance
  • The opportunities to travel abroad

Why Arnia?

We recognize people’s diversity and we try to meet everyone’s goals.

  • Game Evenings
  • Nights Out
  • Team Buildings
  • Trainings

Arnia encourages you to pursuit your own interests, projects and ideas – passion can turn small things into big things – we want to be part of your own individual success. Let us know your ideas and your personal interests and we will find a way to support you.

Relocation Package
Competitive Compensation Packages
Flexible Working Hours
Job Rotation
Performance Bonuses
Medical Benefits

Not the least, we have class A offices, located in Piata Victoriei – Europa House building, next to the metro stations and to other transportation means. It is very easy to get to work and you will enjoy the quality and the lifestyle of our offices.

Attractive Projects
International Work Experience
Referral Program
Learning Through Arnia Academy

And if you like all these, why don’t you join us?

communication-and-media

Whatever role you choose to pursue in our organization, as long as it aligns with our company goals and values, we will support you all the way. We provide for each employee:

  • A clear development plan for your career
  • Mentoring support, to help you grow in our organization
  • Customized trainings and courses
  • Periodical 1:1 meeting with your direct manager and upper management
  • Annual performance reviews
  • Constant feedback and career development support

Also, you will have the chance to mentor other people, to contribute to their growth and to help them with their career development. As a family, we support each other to achieve our best potential and to contribute better to the organization success.

In Arnia we need more than just excellent software engineers – we need highly skilled technical leaders, business analysts, and managers. And they are usually found within our own organization – they are people who showed great skills as individual contributors and choose to follow a leading role. Growing as a leader requires the development of specific skills, such as: people management, social awareness, self-awareness and leadership vision. If you are up to the challenge, we will support you and we will provide the best opportunities to show your talent and dedication.

communication-and-media

And if you choose to be a full-time individual contributor, you will get the chance to develop your engineering skills, enrich your technical knowledge and promote to senior levels – it’s up to you and us to find together the best path for your career.

I joined the Arnia team in 2011 on the XpressEngine project (PHP based CMS, most popular in South-East Asia) and now I’m leading the team that develops our own CMS, Karybu. Also, our PHP team is involved in a lot more projects on different technologies ranging from Magento to WordPress and from Zend Framework to Symfony2.Dan D., PHP Tech Lead @ Arnia

Recruitment process 

Are you looking for a job and it doesn’t seem to be on our job openings list?
Don’t panic! You can send us your resume and we’ll get back to you!

Arnia Software has consolidated its position as a preferred IT outsourcing company in Romania and Eastern Europe, due to its excellent timely delivery and amazing development team.

Our services include:

Nearshore with Arnia Software
Software development outsourcing
Offshore Software Development
Engagement models
Bespoke Software Development
Staff Augmentation
Digital Transformation
Mobile App Development
Banking Software Solutions
Quality Assurance
Project Management
Open Source
Nearshore Development Centre
Offshore Development Centre (ODC)