The AdTech Stack is being Rebuilt, and Engineering Velocity Is Now a Competitive Moat

Digital advertising technology is undergoing its most significant architectural shift at an increasing pace.

Tightening privacy regulation across global markets, the explosion of CTV and streaming inventory, the rise of retail media networks, and the emergence of agentic-driven buying are forcing every layer of the stack, from DSPs and SSPs to data and measurement platforms, to rebuild core infrastructure, simultaneously.

Companies that move fast with the right engineering partners will define the next era. Those that don’t will be disintermediated.

Identity & data compliance complexity

Privacy regulations across the US, EU, and beyond (GDPR, EU AI Act, CCPA, and emerging state laws) are raising the bar for consent management, data residency, rights management, and audience activation infrastructure, requiring engineering investment that most product teams can’t absorb internally.

CTV/streaming complexity

Server-side ad insertion at scale, manifest rewriting, dynamic ad break scheduling, and measurement compliance are specialized skills in short supply.

AI pressure without readiness

Leadership is mandating AI initiatives, but many AdTech platforms weren't architected for ML inference pipelines, agentic workflows, or real-time decisioning.

Legacy platform debt

Aging monolithic ad servers, reporting pipelines with hours of latency, and unmaintained SDK codebases are slowing product velocity, but rebuilding them requires domain knowledge most engineering firms don't have.

Talent and timeline mismatch

Building a specialized AdTech engineering team in-house takes 12–18 months at a minimum; the market window for new products and protocol adoption (like AdCP) is now.

End-to-End AdTech Engineering, From Legacy Modernization to Next-Gen Agentic Infrastructure

Platform Engineering & Modernization

We help publishers, DSPs, SSPs, and data platforms build new platforms and features from scratch, extend and evolve existing ones, or retire technical debt and rebuild for scale, without stopping the revenue engine.

We do:

  • Control & configuration platform design and build
  • Targeting, segmentation, and decisioning engine modernization
  • Ad delivery system performance optimization
  • Data & analytics pipeline reconstruction (latency reduction, real-time capability)
  • Billing & finance system integration

Prebid & Header Bidding

We are active contributors and committee leaders in the Prebid ecosystem. We don't just implement it, we help shape it.

We do:

  • Custom Prebid.js, Prebid SDK, and Prebid Server adapters, modules, connectors and integrations
  • Unified header bidding deployment across web, app, and CTV surfaces
  • Auction strategy tuning and yield optimization
  • Data & consent solutions (TCF, GPP, first-party ID solutions)
  • Scalable infrastructure deployment and performance benchmarking

Video, Audio & Streaming (SSAI/CSAI)

Video advertising is one of the most technically intricate surfaces in the programmatic stack. We bring the domain depth to untangle it, from SSAI pipelines and manifest rewriting to player integration and cross-screen measurement.

We do:

  • Server-side ad insertion (SSAI) pipeline development
  • Manifest rewriting and macro substitution
  • Ad break scheduling engine design
  • Client-side video player integration (IMA SDK, custom players)
  • Measurement & compliance integration (VAST, VPAID, IAB standards)

Mobile & In-App Monetization

n-app and gaming monetization operates on its own rules, different auction dynamics, rendering constraints, and SDK complexity that have no equivalent on the web. As mobile and gaming ecosystems generate some of the highest-value inventory in programmatic, competing here demands specialists. From mediation stack architecture to game engine SDK integration, we build for the unique demands of this channel.

We do:

  • Mediation & in-app bidding framework development
  • Game engine ad integration (Unity, Unreal)
  • Remote configuration & feature flag systems
  • Monetization analytics and reporting pipelines

AI in practice across our engagements

AI shows up differently depending on where you need it. Inside a platform engineering engagement it might mean a real-time decisioning layer or a predictive audience model. Inside a video pipeline it might mean automated ad break scheduling or anomaly detection on playback metrics. The work does not always announce itself as AI. It just makes the engineering outcome better.

Where AI work extends beyond any single offering, we bring it as a dedicated capability:

Platform automation

We automate the repetitive, high-volume workflows inside AdTech platforms that currently depend on manual intervention.

This includes building the agents and automated systems that manage internal operations: seller agents that handle inventory decisions and floor pricing, buyer agents that execute campaign pacing and bid strategy, signal agents that process data streams and trigger downstream actions, and creative agents that select or assemble ad creative based on context.

Automation can be designed with human-in-the-loop approval steps for decisions requiring oversight, or run as fully automated systems where speed is the priority. The goal is to reduce the operational overhead inside your platform so your team spends less time on routine execution and more time on strategy.

Decision and optimization engines

ML has been a cornerstone of AdTech for well over a decade, and the systems that drive real performance have always been model-driven.

We build and improve the decision engines at the core of programmatic infrastructure: floor pricing systems that dynamically adjust reserve prices based on real-time signals, bidding strategy models that optimize spend against performance goals, campaign pacing and budget allocation logic, audience scoring and lookalike modeling, and yield optimization systems that balance competing demand sources.

These are not new problems for us, and the maturity of our ML practice means we build systems that perform in production at auction speed, not just in notebooks.

Generative tools

We build generative AI tooling purpose-built for AdTech workflows, including retrieval-augmented generation (RAG) systems that ground outputs in your own data, media plan generators, automated reporting pipelines, campaign brief and creative brief generation, and operational summary tools.

RAG is particularly valuable for AdTech use cases where accuracy matters, allowing models to draw from proprietary inventory data, audience segments, historical performance, and internal documentation rather than relying on general training knowledge alone.

AI readiness and data infrastructure

AI readiness is as much a data and infrastructure problem as it is a modeling one.

We help clients structure platforms and pipelines for model training and inference, while doing the foundational data work that makes it possible: organizing, cleaning, labeling, and aggregating data across fragmented sources, building ETL and real-time ingestion pipelines, and instrumenting the reporting needed to monitor data quality over time.

The companies that move fast on AI are the ones who invested in the foundation before they needed it.

API, MCP, and agent-to-agent connectivity

We build the connectivity layer that lets your stack participate in the emerging agentic advertising ecosystem.

This includes MCP server and client implementations that expose your platform capabilities as tool-callable services, agent-to-agent (A2A) communication patterns that allow autonomous systems to coordinate across organizational boundaries, and traditional API integration work connecting your infrastructure to external AI platforms and third-party models.

AdCP is built on these protocols, making this connectivity work foundational to any agentic advertising strategy.

AI-driven ops tooling

We build AI-powered tooling that improves engineering velocity and platform reliability, including automated root cause analysis, alert deduplication, and code assistance for internal development teams.

Beyond internal tooling, we also build external-facing tools including ad server integrations, custom reporting and analytics interfaces, developer SDKs, and platform extensions that expose capabilities to third-party systems.

Whether the audience is your engineering team, your operations team, or your clients and partners, we build the tooling layer that makes the platform more usable and more automated.

Let's build the AdTech infrastructure that keeps you ahead of what's next.

Purpose-Built Engineering for Every Layer of the Programmatic Ecosystem

The challenges facing a DSP are not the same ones facing a publisher or a measurement company. Our engagement model adapts to the specific architecture, competitive pressures, and product roadmap of each segment we serve.

Publishers & SSPs

We help sell-side platforms modernize their ad stack, adopt header bidding at scale, implement SSAI for streaming inventory, and build the data and compliance infrastructure needed to operate confidently under evolving privacy regulations.

DSPs & Buy-Side Platforms

We build and optimize bidding engines, audience modeling pipelines, identity resolution systems, and increasingly, agentic campaign management workflows that interface with emerging protocols like AdCP.

Data & Measurement Platforms

From audience CDPs to attribution and analytics systems, we engineer the data infrastructure that makes measurement credible, scalable, and accessible to agencies and advertisers of all sizes.

Ad Networks & Retail Media

We help emerging retail media networks and ad networks build the campaign management, targeting, and reporting infrastructure they need to compete, faster than building in-house, with domain expertise from day one.

case-study-verizon

Rebuilding a Real-Time Data Platform for One of the World's Largest Ad Ecosystems

  • 2.5M events/second throughput — up from a system with 1–2 hour latency
  • 5-minute end-to-end data latency achieved
  • Delivered in 9 months — Lambda architecture, polyglot databases
  • Effective data governance, smart monitoring, and alerting infrastructure

Verizon Media needed to replace a legacy analytics platform that couldn’t scale. Sigma redesigned the entire data platform with a modern Lambda architecture, cutting latency from hours to minutes while handling massive event volume.

case-study-b2b-ad-platform

From Video CMS Startup to Global B2B Ad Platform, Across Every Merger and Acquisition

  • 7-year engagement, scaling from 2 FTE to 60-80 engineers at peak
  • 120TB of data processed daily (~86B events)
  • Near real-time processing at 2-minute minimum intervals, scalable for traffic seasonality
  • Campaign analytics dashboard with 400+ custom reporting metrics

Starting as a video content management system for a startup in 2012, Sigma grew the engagement to a full-scale B2B ad platform uniting buyers and sellers of digital media globally.

The product survived and thrived through multiple rebranding cycles (Vidible, AOL, Oath, Verizon Media), with Sigma serving as the primary engineering partner throughout, delivering full-cycle development, 3rd line support, and UI/UX design.

case-study-intelligent-booking

Unifying 6 Separate Campaign Platforms Into One Intelligent Booking Flow

  • 90M+ linear TV households + nearly 50M IP-addressable households accessible
  • Media planning time reduced from hours across 6+ platforms to a single unified workflow
  • Smart budget attribution based on historical performance data
  • Salesforce integration for streamlined client management and billing

A major TV and internet provider’s ad subsidiary was managing campaigns across siloed platforms, slowing sales velocity.

Sigma Software built a unified platform covering the full campaign lifecycle — from audience forecasting to real-time reporting.

case-study-discovery-portal

27 AI Use-Case Recommendations Delivered Across a Major Media Organization

  • 20+ stakeholder interviews mapping workflows, systems, and operational pain points
  • 27 AI use-case recommendations across sales, operations, reporting, and billing
  • Phased AI rollout roadmap with MVPs prioritized by complexity, adoption, and business impact

A large media organization with a publishing and digital content footprint engaged Sigma for an AI readiness assessment. The engagement delivered a structured roadmap that the client could immediately begin executing.

case-study-media-organization

GenAI-Powered Audience Discovery Portal Shipped in 5 Weeks

  • Built and launched in 5 weeks from kickoff to production
  • Advertisers can identify audiences by multidimensional attributes with real-time data backing
  • GenAI chat interface for clarifying questions and deeper exploration
  • Cloud-native, mobile-ready, scalable architecture

One of the largest US media companies needed a modern audience selling tool. Sigma delivered a client-facing portal powered by generative AI recommendations — helping advertisers find and activate the right audiences instantly.

17 Years Inside the Stack. The Domain Knowledge Shows.

Deep AdTech Domain Expertise

17+ years building within the programmatic advertising stack as engineering partners who understand the RTB auction lifecycle, IAB standards, header bidding mechanics, and SSAI pipelines from first principles.

Our 300+ AdTech engineers have production experience across DSPs, SSPs, CDPs, ad servers, and measurement platforms, as part of a broader global engineering organization that spans industries.

Industry Leadership Across Open Ecosystems

We don't just implement open-source tooling, we help lead it. Sigma holds active leadership positions across multiple Prebid governance bodies, including the LLM and Publisher Monetization Taskforce, the Agentic Taskforce, and the Buyer Taskforce.

We are also a founding member of the Agentic Advertising Organization (AAO), the body governing the AdCP protocol that is defining the next generation of programmatic buying. Our contributions span code, strategy, and standards development, giving our clients a partner who is shaping where the ecosystem goes, not just keeping pace with it.

AI That Goes Back Further Than the Hype

Sigma has been doing serious ML and AI work since 2013, long before it became an industry talking point.

With 50+ ML and Data Engineers and over 100 commercial AI proofs of concept delivered, our AI Center of Excellence brings production-grade machine learning and agentic workflow capability that is woven into how we engineer AdTech platforms, not added as an afterthought.

Fast Integration, No Ramp-Up Tax

Our AdTech Academy keeps engineers current across rapidly evolving protocols and platforms. Because our teams arrive with genuine domain fluency, FTE integration is fast and productive from the start.

No months of onboarding spent explaining how RTB works or what a bid floor is. We get into the codebase and start contributing, without sacrificing engineering quality.

Driven by experts who combine vision with delivery experience

Katherine Tuluzova
Katherine Tuluzova
Chief Executive Officer at Sigma Software, Chair at Prebid LLM Taskforce
  • Innovation
  • Strategy
  • Technology Excellence
A seasoned leader in tech, Katherine drives strategic growth and innovation at Sigma Software while shaping AI-driven industry standards as Chair of the Prebid LLM Taskforce.  

"AI doesn't underperform when the data is broken. It misfires with confidence. Fix the foundation first." 

Olga Paramonova
Olga Paramonova
VP AdTech at Sigma Software, Vice-Chair at Prebid Agentic Taskforce
  • Digital advertising platforms
  • Next-Gen Advertising Standards
With over 16 years in software engineering, Olga has built and scaled Sigma Software's AdTech practice into a trusted partner for major players across the industry, while actively shaping open-source advertising standards as Vice-Chair of the Prebid Agentic Taskforce.

"Advertising is shifting from automated to agentic. At Sigma Software, we are not watching, we are building it." 

Bryan Szekely
Bryan Szekely
Head of AdTech Strategy at Sigma Software, Vice-Chair at Prebid Buyer Taskforce
  • AdTech Strategy
  • Engineering
  • Product Management
With over two decades spanning engineering, product, and strategy, Bryan leads AdTech strategy at Sigma Software and drives industry standards forward as Vice-Chair of the Prebid Buyer Taskforce, bringing a rare combination of technical depth and strategic vision to the programmatic advertising space.

"AdTech is never one stack or one standard. The teams that win are the ones who can navigate all of it." 

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