Senior JavaScript / Prebid Engineer (Web AdTech) - OPS00066

Dev.Pro is a software engineering services company that helps technology companies meet growth ambitions through talent outsourcing. They provide skilled technology engineers to partner with clients, enabling them to achieve complex technical objectives and create business value.

Dev.Pro

Employee count: 501-1000

Brazil only

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🟢 At Dev.Pro, we work on projects that impact millions of people around the world — but we know it’s the people behind the tech who make it all happen. We truly value what makes each person unique and are building a workplace that’s inclusive, friendly, and supportive.

About this opportunity

We are building a high-performance advertising platform that integrates directly into publisher websites via a lightweight JavaScript and React-based widget. Our system renders dynamic local classified listings post-page load and is powered by a custom header bidding stack built on Prebid.js, fully deployed on Amazon Web Services.
We are looking for a Senior JavaScript Engineer with strong AdTech experience (or adjacent high-performance frontend systems) to help scale and optimize our bidding infrastructure and on-page rendering engine.

🧩 Key responsibilities and your contribution

Architect and optimize a custom Prebid.js-based header bidding stack
Build and maintain high-performance JavaScript integrations running on publisher websites
Improve latency, auction efficiency, and yield optimization across ad units
Develop and enhance React-based widgets that render dynamic local listings
Collaborate on bidder integrations, adapters, and demand partner connections
Debug complex issues across browser environments, third-party scripts, and ad exchanges

🟢 Tech Stack

JavaScript (ES6+), TypeScript (preferred)
React (rendering layer for widgets)
Prebid.js / Header Bidding
AWS (Lambda, CloudFront, S3, etc.)
Real-time data flows, event-driven architectures

✅ Is that you?

5+ years of JavaScript engineering experience
Strong understanding of browser performance, async loading, and script execution
Experience with AdTech ecosystems (Prebid, GAM, DSPs, SSPs) OR strong adjacent experience (high-scale JS, real-time systems)
Familiarity with header bidding concepts (auctions, bid requests, latency tradeoffs)
Experience debugging third-party script conflicts and optimizing page performance
Ability to work in a fast-moving, product-driven environment

✅ Nice to have

Direct experience with Prebid.js customization or bidder adapters
Exposure to analytics, tracking, and attribution systems

🎾 What's working at Dev.Pro like?

✔️ 30 paid days off each year — use them for vacation, holidays, or personal time
✔️ 5 paid sick days, up to 60 days of medical leave, and 6 paid days off for family events like weddings, funerals, or having a baby
✔️ Partially covered health insurance - after probation
✔️ Wellness bonus for gym memberships, sports nutrition, and similar needs

Our next steps:

✅ Submit a CV in English — ✅ Intro call with a Recruiter — ✅ Internal interview — ✅ Client interview — ✅ Offer

Interested? Find out more:

Apply now

Please let Dev.Pro know you found this job on Himalayas. This helps us grow!

Apply now

About the job

Apply before

Jun 16, 2026

Posted on

Apr 17, 2026

Job type

Full Time

Experience level

Senior

Experience

5 years minimum

Location requirements

Brazil

Hiring timezones

Brazil +/- 0 hours

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About Dev.Pro

Learn more about Dev.Pro and their company culture.

View company profile

We are a software development partner that empowers innovative technology companies to realize their growth ambitions and accelerate their time-to-market. Founded in 2011, we've built our reputation on being result-driven and quality-obsessed. Our core mission is to provide custom outsourced software development experiences, assembling tailored teams and delivering solutions that meet any skillset, complexity, or scale. We pride ourselves on our ability to help tech-enabled businesses leverage outsourced talent, enabling them to scale quickly and achieve their strategic objectives. Our skilled technology engineers collaborate closely with our clients, becoming an extension of their teams to tackle complex technical challenges and create tangible business value. Over the years, we've had the privilege of working with a diverse range of businesses, from Fortune 500 companies to ambitious, technology-driven startups. This breadth of experience has allowed us to continuously evolve and refine our processes, ensuring we consistently deliver beyond expectations.

Our global team of IT professionals is the backbone of our success. We embrace a diversified, remote work model, with dedicated development teams operating in over 55 countries across 5 continents. This global footprint provides us with the infrastructure, diverse skillsets, and flexibility necessary to deliver high-quality software development services for projects of any complexity or scale. We currently have over 950 talented experts and are continually growing. Our journey began with the vision to leverage years of experience working with development teams worldwide, offering select companies and partners exceptional outsourced software development services. Now, more than a decade later, Dev.Pro stands as a globally distributed company, committed to helping our partners navigate the ever-changing tech landscape and achieve sustained growth. Our commitment to transparency, collaboration, and continuous improvement ensures that we not only meet but exceed the expectations of our clients, fostering long-term partnerships built on trust and mutual success.

Tech stack

Learn about the tools and technologies that Dev.Pro uses to build, market, and sell its products.

View tech stack

React Native

Flutter

Ionic

Node.js

Spring

Ruby on Rails

.NET

JavaScript

Python

Java

PHP

37 more

Dev.Pro employees can create an account to update this tech stack.

Employee benefits

Learn about the employee benefits and perks provided at Dev.Pro.

View benefits

Paid Time Off

You will get 30 paid rest days per year to use as holidays/vacation/other on the desired and requested dates.

Flexible Business Hours

We offer 2 flexible business hours during your workday to use as a lunch break or take care of a personal matter.

Remote Work

You can choose whether you want to work from the office in one of our locations, from your home office, or in a coworking space.

Healthcare

We offer 5 paid sick leave days and up to 60 days of medical leave in case you need it. We also hold wellness marathons and promote activities to keep you motivated under remote work conditions and support your well-being and mental health.

View Dev.Pro's employee benefits

Apply now

Please let Dev.Pro know you found this job on Himalayas. This helps us grow!

Apply now