Senior Full Stack Engineer

StackAdapt Inc.; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Competitive salary

401K / Pension savings

Generous PTO

Mental health support

Health benefits from day one

Remote work reimbursement

Global WeWork options

Training & career development

Job summary

StackAdapt is a leading technology company powering marketers with an AI-driven marketing platform. As an Engineer at StackAdapt, you will contribute production-grade code, work with large data sets, and engage with GoLang, Ruby on Rails, React, GraphQL and more.

We’re seeking a Senior Full Stack Engineer to lead our growing team and tackle challenging, scalable ad-tech problems. There are multiple teams hiring, including Billing, Ivy, Insights, Orchestration, Creatives Library, Developer

Qualifications

• 6+ years of experience building highly performant web applications.
• Strong proficiency in React, TypeScript, GraphQL and full-stack development.
• Experience with test-driven development and scalable systems.
• Collaborates with Product & Design to ship end-to-end features.
• Experience modernizing and migrating legacy systems.

Responsibilities

• Advise teams on pragmatic technical approaches and engineering excellence.
• Architect scalable web APIs and backend services aligned with roadmaps.
• Collaborate with Data Science, Product & Design to solve tech challenges.
• Mentor teammates and conduct code and design reviews.
• Identify bottlenecks and improve system-wide performance.
• Deliver critical projects that bring value to customers.
• Lead by example and maintain software development best practices.

Skills

React

Typescript

GraphQL

Ruby on Rails

Go

Job description

StackAdapt is the leading technology company that empowers marketers to reach, engage, and convert audiences with precision. With 465 billion automated optimizations per second, the AI-powered StackAdapt Marketing Platform seamlessly connects brand and performance marketing to drive measurable results across the entire customer journey. The most forward-thinking marketers choose StackAdapt to orchestrate high-impact campaigns across programmatic advertising and marketing channels.

Engineering at StackAdapt: As an Engineer at StackAdapt, you will be directly involved in the development of our advertising platform, producing production level code that will have a direct impact on the success of our product. You will work with large data sets and have exposure to modern tech stacks around GoLang, Ruby on Rails, React, GraphQL and more. StackAdapt’s engineering organization believes in working collaboratively and cross functionally. You will get the opportunity to work in a diverse and flexible culture with dedicated career paths to help you succeed.

We’re seeking a Senior Full Stack Engineer to help lead our growing full-stack engineering team. The digital advertising industry is riddled with interesting challenges as we continue to scale out our platform with a fast-growing list of customers.

There are the teams that are currently hiring:

• Billing: The Billing team builds the infrastructure that powers customer billing, invoicing, tax integrations, payment workflows, and cost data across StackAdapt. Candidates will work on complex billing systems, payment gateway integrations, invoicing modernization, direct mail and email billing, and financial workflow automation.
• Ivy: The Ivy team is building AI-powered experiences that help customers navigate and optimize complex advertising workflows more intuitively. Candidates will work at the intersection of applied AI, user experience, and large-scale advertising technology platforms.
• Insights: The Insights team is focused on building platform features that help users analyze their data and surface actionable ideas to improve their campaigns performance.
• Orchestration: The Orchestration Flows team builds automated customer journey workflows that connect programmatic advertising, email, and direct mail actions. Candidates will work on triggers, journey mapping, split testing, cadence logic, pre-built templates, and multi-channel automation flows.
• Creatives Library: The Creatives Team at StackAdapt is on a mission to build a one-stop-shop solution for advertisers’ creative production and management needs. We’re developing a comprehensive in-house tool that enables clients to create, enhance, preview, store, and manage CTV, video, audio, and DOOH ads at scale—whether using ready-made templates or building from scratch. By delivering a robust, full-featured in-house solution, we aim to reduce reliance on costly third-party creative providers and empower advertisers to move faster and more efficiently.
• Developer Experience: The Developer Experience team improves how engineers across StackAdapt build, test, and ship software at scale. Candidates will work on engineering productivity, CI/CD systems, developer tooling, and platform foundations that improve reliability and accelerate delivery across the organization.
• Audiences & Pixels: Any digital marketing or programmatic advertising campaign starts with identifying the right audience to increase awareness and reach. Audiences & Pixels is a team of high-caliber fullstack engineers whose mission is to enable marketers achieve their goal by building simple yet powerful workflows to enrich the audience and their conversion journey data to power downstream activities in the programmatic lifecycle. The team and their projects will have high impact and high visibility across the company!
• Developer Ecosystems: This team at StackAdapt focuses on building and supporting a thriving community of developers who integrate with, extend, and build upon our platform. We achieve this by providing essential tools, comprehensive documentation, and robust APIs, all designed to empower external developers and ensure their success. Our work also involves developing the necessary infrastructure to support our product offerings. We work closely with numerous internal teams to create solutions that benefit our users across various platforms, including our web platform, partner sites, applications, and AI assistants. Additionally, we actively engage with external partner developers, offering guidance and assistance to help them understand and resolve their challenges.

Watch our talk at Amazon Tech Talks: https://www.youtube.com/watch?v=lRqu-a4gPuU

StackAdapt is a Remote First company, we are open to candidates located anywhere in Canada for this position.

What You’ll Be Doing:

• Plays a key role in consistently advising the team on pragmatic technical approaches to problems that encourage engineering excellence and developer happiness
• Can structure coherent and iterative actionable plans toward delivering effective solutions across the planning surface
• Plans ahead by strategically architecting scalable web APIs, component libraries and backend systems that serve the team roadmap goals
• Collaborate with stakeholders from Data Science, Product & Design and other senior engineers across the organization to identify and solve technical challenges that drive impact across teams
• Advise teams on technical debt consolidation in ways that efficiently service our business needs
• Mentor the team and lead by example to uphold software development best practices in addition to conducting rigorous code and tech spec reviews
• Identify bottle-necks and general system-wide performance issues and offer actionable solutions to address them
• Be a significant individual contributor and a key asset in delivering critical projects that ultimately bring value to our customers

What You’ll Bring to the Table:

• 6+ years of experience building highly performant web applications with outstanding UX
• Knowledge of our full-stack technologies is highly preferred - React, Typescript, GraphQL, Ruby on Rails and Go
• Extensive experience working with a test driven approach to writing code with one or more of our core full-stack (or comparable) technologies
• Experience collaborating closely with Product & Design to design, implement and iterate on high impact end-to-end product experiences
• Experience working with relational databases and key-value storesExperience analyzing, benchmarking and optimizing web application performance across the entire stack
• Experience leading large scale modernization efforts to revamp legacy systems from start to finish
• An appetite for unpacking complexity and simplifying it wherever possible

StackAdapter’s Enjoy:

• Highly competitive salary
• Retirement/ 401K/ Pension Savings globally
• Competitive Paid time off packages including birthday’s off!
• Access to a comprehensive mental health care program
• Health benefits from day one of employment
• Work from home reimbursements
• Optional global WeWork membership for those who want a change from their home office and hubs in London and Toronto
• Robust training and onboarding program
• Coverage and support of personal development initiatives (conferences, courses, books etc)
• Access to StackAdapt programmatic courses and certifications to support continuous learning
• An awesome parental leave program
• A friendly, welcoming, and supportive culture
• Our social and team events!

Please note: Benefits and perks may vary depending on your country of employment and the nature of your engagement. In locations where StackAdapt does not have a legal entity, employment and benefits are administered in accordance with local regulations and partner policies.

StackAdapt is a diverse and inclusive team of collaborative, hardworking individuals trying to make a dent in the universe. No matter who you are, where you are from, who you love, follow in faith, disability (or superpower) status, ethnicity, or the gender you identify with (if you’re comfortable, let us know your pronouns), you are welcome at StackAdapt. If you have any requests or requirements to support you throughout any part of the interview process, please let our Talent team know.

We use artificial intelligence (AI) to streamline the resume reviews of candidates and assess their fit based on the criteria outlined in the job posting. We do not use AI to make any final hiring or interview decisions.

About StackAdapt

We’ve been recognized for our diverse and supportive workplace, high performing campaigns, award-winning customer service, and innovation. We’ve been awarded:

G2 Top Software for 2026
2026 Best Workplaces™ for Young Talent and in Canada by Great Place to Work®

To learn more about our privacy practices, please see our Privacy Policy.

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