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Senior Backend Engineer

Company:
Osv-Rubicon
Location:
Belfast, United Kingdom
Posted:
July 18, 2025
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Description:

Senior Engineer

Belfast, Northern Ireland

Hybrid Schedule (M/F remote, T/W/TH in-office

At Magnite, we cultivate an environment of continuous growth and collaboration. Our work impacts what millions of people read, watch, and buy, and we’re looking for people to help us tackle that responsibility with creativity and focus. Magnite (NASDAQ: MGNI) is the world’s largest independent sell-side advertising platform. Publishers use our technology to monetize their content across all screens and formats including CTV / streaming, online video, display, and audio. Our tech fuels billions of transactions per day!

The Team:

Magnite is looking for a Senior Software Engineer to join the Marketplace Quality Engineering team. This team designs, builds, and maintains systems that protect the integrity and transparency of Magnite’s advertising automation platform and enable our partners to protect their brands. In this role, you will have the opportunity to design and implement complex and scalable systems that support trustworthiness in a fast-paced and ever-changing industry.

In this role you will:

Design, implement, test, deploy, and manage systems that support marketplace quality needs across multiple Magnite platforms

Manage individual project priorities, deadlines, and deliverables

Work collaboratively with multiple, distributed engineering teams and business stakeholders

Think and work creatively to design and implement solutions that are effective, efficient, reliable, testable, and scalable

Write production-ready code and tests that meet both system and business requirements

Participate and lead design and code reviews

Support our work by responding to feature requests, bug reports, performance issues and ad-hoc questions

We’re looking for someone with:

4+ years of software engineering experience

Expertise with at least one statically-typed, object-oriented language (e.g., Java, C++, Rust)

Java and Python experience (preferred)

SQL expertise

Experience and agility working in a command line environment on Linux, including tools like Git and Docker

Strong written and verbal communication skills, and the ability to work well in a distributed environment

AWS experience is a plus

A passion for solving technical problems and helping others do the same

Our current tech stack (Requirement 1

Java / Spring Boot

Python

Docker

JavaScript/TypeScript / React

Postgres / MySQL

Linux (both on-premise and AWS)

Comprehensive Perks and Benefits:

Holiday Breaks and Quarterly Wellness Days

Equity and Employee Stock Purchase Plan

Family-Focused Benefits and Parental Leave

Private Medical Insurance (delete if not UK)

Competitive Pension Plan

Disability and Life Insurance

Mobile Phone Subsidy

Fitness and Wellness Reimbursement

Company Culture:

We believe collaboration is essential to success. Magnite’s hybrid schedule includes two days worked remotely (Monday and Friday) and three days on-site (Tuesday, Wednesday and Thursday). Our offices provide lunches, beverages, snacks, training and development, and office events to support your work week. We also understand you have appointments, families, hobbies, and other commitments. Magnite strives to maintain a healthy work/life integration for all employees so you can bring your best every day - both at work and at home.

Magnite Invests in You:

Career Development Initiatives and a Career Growth Framework

Culture and Inclusion Programs

Bonusly Peer-to-Peer Recognition Program

Community Service and Volunteer Events

Company-Matched Charitable Contributions

Mental Health Support

About Us

The world's leading agencies and brands trust our platform to access brand-safe, high-quality ad inventory and execute billions of advertising transactions each month. Anchored in bustling New York City, sunny Los Angeles, mile-high Denver, historic London, and down under in Sydney, Magnite has offices across North America, EMEA, LATAM, and APAC.

Our Commitment: We aim to incorporate a wide range of voices into our Magnite culture, cultivating an environment where employees feel welcomed, cared for, and encouraged to freely share ideas. We are committed to employee growth, collaboration, inclusion, and innovation. We invest in Magnite’s local communities. We seek talent from all backgrounds to champion corporate values of seeing the big picture and being catalysts of change.

Want to learn more about us?

Check out our blog for Magnite announcements and Ad Tech industry news!

Recruiting Agency Notice

Magnite does not accept agency resumes and is not responsible for any fees related to unsolicited resumes.

R-01072

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