Lead Software Engineer (AdTech)

EPAM·Argentina, Colombia, Mexico, Brazil, Chile·Удалённо·вчера

We are seeking a Lead Software Engineer (AdTech) to architect and build high-performance ad serving systems on the hot path. This is an individual contributor role where you will set technical direction across ad serving, SSAI, RTB and identity, mentor senior engineers and represent our technical position with major industry partners. You will own auction-level economics, quantifying the revenue impact of every millisecond of latency and every dollar of infrastructure spend.

Responsibilities

Architect and write code on the hot path as a hands-on individual contributor
Set technical direction on ad serving, SSAI, RTB and identity through design docs that you write, defend and update as reality dictates
Mentor engineers by setting the bar on code review, production discipline and how the team reasons about latency, cost and correctness
Own auction-level economics and quantify the revenue-per-thousand-impression consequence of latency and AWS spend on the ad path
Represent the company's technical position with partners including GAM, SSPs, DSPs, measurement vendors and IAB Tech Lab
Set the hiring bar for future engineers and participate in the loop on every senior+ AdTech hire
Drive production ownership of systems serving hundreds of millions of ad requests per day
Make and defend judgment calls to reject features that compromise latency, correctness or unit economics

Requirements

5+ years of professional software engineering experience, with at least 3 years inside an SSP, DSP, ad server, ad exchange or CTV/OTT platform
Production ownership of a system that has served at least hundreds of millions of ad requests per day
Deep proficiency in at least one systems language for the hot path: Go, Java, C++ or Rust, with working comfort in another
Fluency in JavaScript, Node.js and TypeScript for tooling, control-plane services and the Prebid wrapper layer
Working-spec-level command of OpenRTB (2.x and 3.x), VAST (3 and 4), VPAID, VMAP and SIMID
Direct experience with SSAI including pod construction, manifest manipulation, ad stitching and the failure modes of delivering ads inside HLS or DASH streams
Header-bidding architecture experience including Prebid.js client-side, Prebid Server, wrapper design and price-floor strategy
Engineer-level expertise with Google Ad Manager APIs, the line-item and key-value model and where the abstractions leak
AWS at scale with specific fluency in EC2/EKS, ECS and Lambda, plus DynamoDB, Kinesis, MSK/Kafka and CloudFront
Distributed systems literacy across queueing theory, backpressure, idempotency, hot-key mitigation and multi-region failover
FinOps instinct with a clear understanding of stack cost per thousand ad requests
Capability to use React where it touches ad-ops surfaces
Advanced proficiency in English (C1+)