Senior Backend Engineer - Adtech / SSP

Nexxen; Bellevue (WA); Hybrid; USD 180,000 - 200,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Disability insurance

401(k)

Employee Assistance Program

Parental leave

Unlimited vacation

Company‑paid holidays

Job summary

Nexxen SSP – hybrid, three days in-office in Bellevue, WA – is seeking a Senior Software Engineer to join our software development team. You’ll own complex, end‑to‑end initiatives for a high‑throughput SSP that processes billions of real‑time ad requests daily.

Apply an AI‑first mindset, mentor peers, and improve performance, scalability and observability through code reviews, testing, and robust design across DSP/SSP integrations.

Qualifications

• BS/MS in Computer Science or related field preferred.
• 5+ years of expert‑level JavaScript/Node backend experience at scale.
• Strong grounding in distributed systems, caching, and load balancing.
• Solid fundamentals in data structures, algorithms, and systems design.
• Experience with distributed databases and streaming pipelines (Aerospike, Redis, Kafka, Kinesis).
• Proficient in SQL, Linux, networking, and Git; track record of mentorship.

Responsibilities

• Own complex initiatives end‑to‑end: design, implementation, integration, rollout, and operation.
• Apply an AI‑first mindset to software development and data exploration.
• Integrate with DSPs/SSPs and third‑party data providers; adhere to standards such as OpenRTB and VAST.
• Build high‑throughput, low‑latency services with caching and in‑memory stores.
• Maintain observability, incident response, capacity planning and on‑call readiness.
• Lead code reviews and mentor peers to raise the technical bar.
• Identify and resolve performance bottlenecks in high‑volume systems.

Skills

JavaScript/Node backend

Distributed systems

Data structures & algorithms

System design

Testing & QA mindset

Education

BS/MS in Computer Science or related field

Tools

Aerospike

Redis

Kafka

Kinesis

Linux

Git

SQL

Job description

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.

Senior Software Engineer

Nexxen SSP | Hybrid – 3 days/week in office

Join Nexxen’s SSP Software Development team building and running a high‑throughput SSP that processes hundreds of billions of real‑time ad requests a day. You’ll own complex, ambiguous problems end‑to‑end, apply an AI‑first mindset to solve hard AdTech problems, and raise the bar for the team through code review and mentorship – with performance, scalability, and operational excellence guiding every project.

What you’ll do

• Own complex initiatives end‑to‑end: design, implementation, integration, rollout, and operation
• Apply an AI‑first mindset to software development and data exploration
• Integrate with DSPs, SSPs, third‑party data providers, and standards such as OpenRTB and VAST
• Build high‑throughput, low‑latency services with efficient caching and in‑memory stores (Redis, Kafka, Aerospike)
• Apply an SRE mindset: observability, incident response, capacity planning, and a shared on‑call pager rotation
• Raise the technical bar through code review, mentorship, and process/tooling decisions
• Identify and resolve performance bottlenecks in systems processing billions of transactions per day
• Drive test, monitoring, and automation coverage, including load and acceptance testing
• Partner with product, ops, and engineering teams to shape roadmap and architecture

What you’ll bring

• BS/MS (preferred) in Computer Science, Engineering, or related field
• 5+ years of expert‑level JavaScript/Node backend experience at scale
• Strong grounding in distributed systems: scaling, fault tolerance, caching, load balancing
• Solid fundamentals in data structures, algorithms, and systems design
• Hands‑on with distributed databases (Aerospike, Redis) and streaming pipelines (Kafka, Kinesis)
• Strong SQL/RDBMS, Linux, networking, and Git skills
• Track record of code review and mentorship that raises the bar for other engineers
• Test‑first mindset with automated acceptance and load testing
• Excellent communicator and strong team player
• AdTech industry experience strongly preferred

Nexxen SSP – real‑time programmatic advertising, hundreds of billions of ad requests processed every day.

In support of pay transparency and equity, the minimum and maximum full‑time annual base salary for this role is $180,000 – $200,000 the time of posting, with the potential of an incentive or bonus. While this is our reasonable expectation this is not a guarantee of compensation or salary, actual compensation is influenced by a wide range of factors including but not limited to skill set, level of experience, education, certifications, responsibility, and geographic location. Candidates hired to work in other locations will be subject to the pay range associated with that location. We offer a variety of benefits, including medical, dental, vision, disability insurance, 401(k), EAP, parental leave, unlimited vacation, and company‑paid holidays. The specific programs and options available will vary depending on the state, start date, and employment type. Our Talent Acquisition team will be happy to answer any questions you may have.