Senior Software Engineer, Payments & Incentives

Quantcast Corporation; Greater London; Hybrid; GBP 110,000 - 150,000; Full time

Benefits offered by this job

Performance bonus

Equity

Benefits package

Job summary

Quantcast Corporation in London is seeking a Senior Software Engineer to join the Payments & Incentives team, shaping the next generation of billing pipelines and fintech capabilities. You will build and maintain distributed systems, APIs, and microservices for high-scale campaigns.

The role emphasizes collaboration with product, finance, and revenue operations, plus on-call incident management and a focus on operational reliability, observability, and SDLC in an Agile environment.

Qualifications

• 2+ years of experience building and maintaining complex distributed systems.
• Experience designing APIs and microservices in production.
• Proficient in Go and Python or ability to learn quickly.
• Understanding of observability and SDLC in an Agile environment.

Responsibilities

• Engage with internal customers, product owners and stakeholders to resolve dependencies.
• Support development of peers through feedback on code and design.
• Manage on-call incidents and improve system health and financial integrity.
• Translate end-user requirements into robust technical solutions.

Skills

Go

Python

Distributed systems

Microservices

APIs

Observability

SDLC

Agile

Communication

Education

Bachelor's degree in Computer Science

Tools

AWS

Kafka

SQS

Snowflake

Job description

Senior Software Engineer, Payments & Incentives

• FullTime
• London

At Quantcast, we don't just build advertising technology, we revolutionize how it works. Our AI-powered Demand Side Platform (DSP) connects the world's most ambitious marketers with their ideal audiences across the open internet, delivering results that actually move the needle. Since 2006, we've been the industry's trailblazer, launching the first AI-powered measurement platform for publishers and the first AI-driven DSP. Our AI doesn't just optimize—it delivers the measurable outcomes that matter most to our clients, giving them the competitive edge they need in a crowded marketplace. Ready to join the team that's defining the future of digital advertising?

We are looking for a Senior Software Engineer to join the Payments & Incentives team. The team acts as the financial engine of Quantcast, managing the intersection of complex ad-tech data and precise fintech requirements. The team is responsible for building frictionless payment solutions for our users, operating incentive programs to increase customer retention, and managing internal systems that power the billing pipelines. Operating across multiple functional areas, the team bridges engineering with customer experience, support, and essential back-office functions such as finance and revenue operations.

You will be at the forefront of innovating solutions that integrate efficient payment, billing, and reward programs directly into our high-scale next generation advertising platform, focusing on making digital advertising campaigns as simple as possible for our customers. Our infrastructure handles diverse use cases, from real-time fee breakdowns for campaign forecasting and bidding to unified billing workflows that synchronize across application databases, Snowflake and NetSuite. We are currently refactoring these mission-critical pipelines to consolidate billing logic, which will enhance invoice visibility and traceability for revenue operations. These mission-critical systems enable global brands to scale their business with us.

What you'll do:

Continually engage with internal customers, product owners and business stakeholders to understand and resolve cross-team dependencies and end-user requirements.

Support the professional development of your peers and junior members through constructive feedback on code, system design and engineering processes.

Manage the resolution of complex on-call incidents, implementing measures to improve long-term system health and financial integrity.

You might be a great fit for this role if you:

Focus on outcomes: You don\'t claim victory at code completion; you measure success by positive business results and customer adoption.

Operate with autonomy: You are comfortable taking high-level priorities and turning them into actionable, well-defined technical roadmaps without constant supervision.

Bridge the gap: You enjoy deeply understanding the end-customer use case and translating those requirements into robust technical solutions.

Advocate for excellence: You have a passion for mentoring others and are dedicated to maintaining high standards for code quality and operational reliability.

Who you are:

You have at least 2 years of experience building and maintaining complex distributed systems, with a focus on microservices and adjacent technologies. Experience working vertically across the stack is a significant plus.

You have a degree in Computer Science or an adjacent field (or equivalent nontraditional training).

You are proficient in Go & Python or a similar modern language, or can demonstrate the ability to pick it up relatively speedily.

You have experience designing and implementing APIs and microservices in a high-velocity production environment.

You possess a deep understanding of observability and the full software development life cycle (SDLC) in an Agile environment.

You can effectively distill complex technical updates into clear, actionable information for both technical and non-technical stakeholders.

You excel at working across team boundaries and with third parties to untangle dependencies and move projects forward.

Familiarity with cloud technologies (AWS), messaging systems (Kafka, SQS), or data warehouse tools (Snowflake) is a significant plus.

#LI-SK1

At Quantcast, we craft offers that reflect your unique skills, expertise, and geographic location. On top of a competitive salary, this position includes a performance bonus, equity, and a comprehensive benefits package. For more details, visit our Careers Page and see how we support our team. We are headquartered in San Francisco with offices around the world. Quantcast is an Equal Opportunity Employer. Please see the Applicant Privacy Notice for details on our applicant privacy policy. Join the team that unlocks potential.