Senior Software Engineer I

Kargo22

Greater London

On-site

GBP 90,000 - 130,000

Full time

14 days+

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Job summary

Kargo is hiring a Senior Software Engineer to join the In-App ad delivery team, spanning client- and server-side engineering across multiple stacks. You will help lead the In-App team in delivering new integrations that maximize in-app revenue, handling billions of ad requests and enabling clients to act on insights from millions of ads.

You will own key initiatives, collaborate across tech stacks, and ensure reliable, scalable ad delivery and integration work across Online Video and In-App

Qualifications

5+ years of software engineering, with teams/initiatives leadership.
Experience developing client- and server-side solutions in ad tech.
Strong command of a modern language; Golang/JS/PHP/Python experience beneficial.

Responsibilities

Own In-App initiatives and ship against the product roadmap.
Launch new in-app integrations to maximize revenue across stacks.
Establish engineering ownership for In-App ad delivery and ensure coverage.
Improve reliability and maintainability of In-App/OLV delivery and address debt.
Provide engineering support for Online Video (OLV) and related needs.
Strengthen documentation and knowledge sharing across the stack.
Collaborate across full stack development from ideation to delivery.

Skills

Team leadership

Ad tech experience

Programming basics

Tools

AWS

Kubernetes

Docker

Apache Airflow

Job description

Kargo creates powerful moments of connection between brands and consumers to build businesses. Every day, our dynamic teams work to radically raise the bar on what agentic AI, CTV, eCommerce, social, and mobile can do to deliver unique ad experiences across the world’s most premium platforms. Taking a Creative Science approach to all we do, we continuously innovate solutions that outperform industry benchmarks and client expectations. Kargo is growing rapidly and currently has offices in NYC, Chicago, LA, Dallas, Sydney, Auckland, London and Waterford, Ireland.

Who We Hire

Techies who want to build the future. Creatives who want to design it better. Communicators to win business. Collaborators to build it. Data pros who turn numbers into insights. Product builders who turn ideas into innovations. Anyone eager to be on a team that doesn’t stop to ask what’s next, because they’re already building it.

The Opportunity

Kargo is hiring a Senior Software Engineer to join our multidisciplinary in-app ad delivery team, spanning client-side and server-side engineering across multiple technology stacks, frameworks, and languages. This role will help lead the In-App team in delivering net-new integrations that maximize in-app revenue at Kargo—working on systems that handle billions of ad requests and help clients deliver and make informed decisions from millions of ads.

The Daily To-Do

Take ownership of key In-App initiatives and ship against the product roadmap, driving in-app projects on the team and across Kargo
Launch net-new in-app integrations to maximize in-app revenue, iterating and innovating on in-app ad delivery, measurement, and management across a variety of technology stacks
Establish stable, dedicated engineering ownership for In-App ad delivery—building redundancy and technical depth so development, maintenance, and production support have sustainable coverage
Improve the reliability and maintainability of In-App and video ad delivery, quickly identifying technical debt, operational risks, and recurring support issues and driving them toward resolution
Provide dedicated engineering support for Online Video (OLV), ensuring emerging maintenance, feature, and production needs have clear ownership
Strengthen knowledge sharing and documentation across the stack, making In-App and OLV systems easier for the broader team to support
Collaborate across the full lifecycle of full-stack development—from ideation to delivery of high-quality, best-in-class capabilities that give our team and customers an edge in the market

Qualifications

5+ years of experience in a software engineering role, with experience leading teams and initiatives
A background developing client- and server-side solutions in ad tech
Strong command of a major modern programming language (we work with Golang, JavaScript/NodeJS, PHP, and Python, but direct experience with these isn't required)
Proficiency with AI tools and workflows, plus a solid understanding of the Software Development Life Cycle, including QA and deployment processes
Comfort working directly with business stakeholders to define, prioritize, and deliver against evolving requirements
Experience querying large datasets to understand trends, optimize delivery, and troubleshoot issues; comfortable pairing and giving and receiving code reviews
Experience with cloud technologies (AWS, Apache Airflow, Dockerized Kubernetes environments) is a plus

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