Senior Software Engineer

Who is Nexxen?
Flexible advertising, unified by data. Nexxen empowers advertisers, agencies, publishers and broadcasters around the world to utilize data and advanced TV in the ways that are most meaningful to them. Our flexible and unified technology stack comprises a demand-side platform (“DSP”) and supply-side platform (“SSP”), with the Nexxen Data Platform at its core.

Why join the Nexxen team?
With a global footprint, you can be part of a team that is transforming advertising through our creative, flexible and unified solutions. Employees hustle, commit and dedicate themselves to pillars that make up the Nexxen Way – the 3Cs - Customer Centric, Curious Mindset, Collaborative with No Ego.

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The Senior Software Engineer will join the Nexxen DSP Software Development team as a senior technical contributor and trusted leader on mission-critical, high-throughput services. Our DSP processes billions of real-time transactions a day with strict sub-100ms SLAs, so performance, scalability, and operational excellence will guide every project you take on. You will independently translate ambiguous business problems into simple, robust technical designs, raise the engineering bar through code review and mentorship, and champion the application of the latest technologies, including AI, to solve hard AdTech problems.

This role will be based in our San Carlos local office. Our team follows a hybrid schedule, working in the office three days a week and remotely for the rest.

What You’ll Do:

• Serve as a senior engineer on a talented team building critical, high-performance, largescale services for Nexxen DSP programmatic integrations and platform products

• Independently transform vague business requirements into simple, well-reasoned

technical designs and drive them from concept through production

• Partner closely with the Product team, the Engineering Manager, and cross-functional teams

stakeholders to shape requirements, scope, and roadmap

• Take full ownership of complex initiatives, end-to-end design, implementation,

integration, rollout, and post-launch operation

• Write solid, testable, and performant code for services supporting high throughput and

low latency (< 70ms response time)

• Set the technical bar through code reviews and pair programming, inspiring mid- and

junior-level engineers to write simple, testable, and performant code by example

• Mentor and uplevel teammates; act as a force multiplier for the broader engineering

organization

• Apply an SRE mindset to production deployments—observability, on-call readiness,

incident response, capacity planning, and continuous reliability improvements

• Identify and resolve performance bottlenecks in large-scale distributed systems that

process billions of transactions per day with strict SLAs

• Drive increased test, monitoring, and automation coverage across services, including

automated acceptance testing

• Collaborate on technical design across teams and contribute to architectural decisions

for the DSP platform

• Explore and prototype the application of emerging technologies, especially AI, to solve

technical and AdTech problems

• Operate within Agile / DevOps practices in a fast-paced environment where you can

quickly see the results of your work

• Lead and participate in planning, grooming, and architectural review sessions with the

team and stakeholders

What You’ll Bring:

• Expert Java engineer with 7+ years building backend systems at scale

• In-depth knowledge of the JVM ecosystem, including garbage collection