Senior Frontend Engineer, Retail Media / AdTech Solutions (m/f/d)

AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards.

WHY JOIN US
If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you!

ABOUT THE ROLE
We are looking for a
Senior Backend Engineer
to design and build scalable middleware services powering digital ordering, payments, loyalty, and third-party integrations across a major consumer platform. You will develop serverless applications using AWS Lambda and API Gateway, build Node.js/TypeScript microservices, design event-driven architectures with SQS/SNS, and implement infrastructure as code with Terraform. The role includes active use of AI-assisted development tools as a core part of the daily engineering workflow.

WHAT YOU WILL DO
- Develop serverless applications using AWS Lambda and API Gateway;

- Build and maintain Node.js/TypeScript microservices;

- Design event-driven architectures using SQS/SNS;

- Build infrastructure as code using Terraform;

- Leverage AI-assisted development tools (GitHub Copilot, Claude, and similar) as a core part of daily engineering work — from code generation and refactoring to test coverage and documentation. Champion AI tooling adoption across the team;

- Create integrations with delivery providers and payment platforms;

- Collaborate with business stakeholders and product teams to understand functional and technical requirements; translate those into scalable, maintainable architecture and implementation plans;

- Conduct constructive code reviews and provide technical design guidance to peers and junior engineers, raising the overall quality and consistency of team output;

- Enforce data governance, security policies, and compliance standards throughout the software development lifecycle;

- Implement secure authentication and identity flows using Amazon Cognito.

MUST HAVES
- 4+ years of backend development experience;

- Demonstrated experience building and operating RESTful and/or GraphQL APIs at scale;

- Strong proficiency in one or more of: JavaScript/TypeScript (Node.js, Java, or C#);

- Experience with serverless architectures on AWS (Lambda, API Gateway, DynamoDB, SQS/SNS);

- Demonstrated experience building and operating RESTful and/or GraphQL APIs at scale;

- Experience with CI/CD pipelines and source control workflows (Git, GitHub Actions, Azure DevOps);

- Familiarity with Infrastructure as Code (Terraform or CloudFormation);

- Solid understanding of integration patterns: event-driven architecture, webhooks, async messaging, and pub/sub;

- Experience integrating with third-party platforms and vendor APIs (e.g., delivery aggregators, POS systems, loyalty platforms, or similar ecosystem partners);

- Ability to translate ambiguous business requirements into clear technical specifications;

- Collaborative mindset with a willingness to give and receive candid code review feedback;

- Strong debugging, root-cause analysis, and production incident management skills.

- Upper-intermediate English level.

NICE TO HAVES
- DoorDash, Uber Eats, or similar delivery integrations;

- Payment platform integrations;

- Restaurant, retail, or QSR experience;

- Amazon Cognito expertise;

- Experience with multi-region AWS deployments and global traffic management (Akamai, CloudFront);

- Familiarity with identity and authentication patterns: OAuth 2.0, OpenID Connect, AWS Cognito;

- Hands-on experience with observability platforms (Dynatrace, Datadog, CloudWatch);

- Experience prompting, fine-tuning, or orchestrating LLMs/AI agents as part of a software delivery workflow;

- Experience in QSR, retail, or e-commerce domains;

- AWS Certified Developer – Associate or higher;

- Exposure to React Native or cross-platform mobile app integration patterns.

PERKS AND BENEFITS
-
Professional growth
: Mentorship, TechTalks, and personalized growth roadmaps.

-
Competitive compensation
: Competitive USD-based compensation and budgets for education, fitness, and team activities.

-
Exciting projects
: Modern solutions with Fortune 500 and top product companies.

-
Flextime
: Flexible schedule with remote and office options.

An Introduction to Primer
Primer is the unified infrastructure for global payments. We give finance and payments teams the visibility and control to reduce complexity, improve performance, and capture more revenue - all from a single platform.

Backed by Sofina, Peak XV Partners, ICONIQ, Tencent, Accel, and Balderton, we're building the payments layer the world's best companies rely on.

Watch our showcase >

Read up on our $100m Series C

Learn more about our culture >

🔍 What will you be doing?

• Leading the design and implementation of core backend services for high performance, complex distributed systems
• Taking ownership of key technology decisions, building for scale and optimising for output
• Driving and using modern development practices such as BDD and TDD would be highly beneficial
• Creating clear, modern, well tested code
• Collaborating across teams in a product-driven environment
• Conducting code reviews and continuously look at ways of improving our ways of working
• Creating detailed internal documentation for the projects you work on

👀 What We’d Love To See

• In-depth understanding of the entire development process (design, development and deployment)
• Knowledge of building developer frameworks and workflows, allowing both customers and third-parties to integrate as seamlessly as possible
• Experience in Python is advantageous (it's what we use!) but we have had success hiring engineers of any technical background and understand that people can adapt
• Highly motivated self-starter who values autonomy and getting things done
• Excellent verbal and written communication skills
• Payments knowledge, always looking for ways to optimise our merchant developer experience
• You will need to be based in: Poland, Portugal, Hungary, Romania or South Africa.

✅ A typical interview process

• An initial intro call with a Talent Partner
• An interview with the Hiring Manager
• Challenge Stage - Contextualised to the role
• A final, values-alignment interview

What's the culture like at Primer?
We're building a culture where people can do their best work and be proud of the impact they have. You'll be working with people who are mission-driven, smart, and reflective, and who are genuinely invested in building exceptional products and delivering success for our merchants.

We work remotely, and have done since day one. We believe that building a successful, profitable company goes beyond proximity. We invest in our relationships through great remote working practices and thoughtfully designed face-to-face time, including workations, our annual company retreat, and access to co-working spaces across most major cities.

The work is challenging. Scaleups are a challenge, and building category-defining products is a challenge. But there's a meaningful difference between a challenge and a struggle. At Primer, the right challenge comes with the right support: strong onboarding, a collaborative environment, and a team that is genuinely invested in your success. It's never something you face alone.

Our benefits

🌍 We are fully remote and globally distributed; and have been since day one

💰 Competitive share options

🌴 Uncapped holiday, with 25 days minimum to be taken

🗣️ Co-working space access across major cities

📅 Workations & Company Retreat

💻 The best equipment for your role

🏠 £500 towards your home office setup

🔎 Generous learning budget

🏥 Private Medical Insurance

📈 A broad set of additional perks and benefits (
depending on location)
Don’t meet every single requirement?

At Primer, we're dedicated to building a diverse, inclusive, and authentic workplace. If you're excited about this role but your experience doesn't align perfectly with every qualification listed, we encourage you to apply. You may be the right candidate for this or other roles.

Primer is committed to the equal treatment of all current and prospective employees and adopts a zero-tolerance approach to discrimination, regardless of age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, marriage and civil partnership, or any other background or belief.

About Nabla
We are a team of entrepreneurs, clinicians and engineers committed to bringing back joy to the practice of medicine.

Together with a community of clinician innovators, we’ve harnessed the best of machine learning science to develop Nabla: the leading AI assistant that’s restoring the human connection at the heart of healthcare. By streamlining clinical documentation, Nabla is helping clinicians focus on what matters most - patient care. Today, over 100,000+ clinicians across 130+ healthcare organizations trust Nabla to support how they deliver care every day.

We’re at the start of an ambitious journey: Ambient listening, dictation, coding, and command capabilities are all converging into a proactive assistant that intuitively streamlines clinical and financial workflows.

Backed by a recent $70M Series C, we’re hiring to build the next generation of clinical AI and improve the lives of clinicians and patients everywhere.

This is a great time to join us!

The best of AI at the service of healthcare
Nabla’s phenomenal traction is the result of 3 years of diligent product development.

Led by former Meta AI Research engineers, our team has consistently anticipated how AI can revolutionize healthcare delivery. Our Machine Learning team continually leverages the latest advancements to unlock AI’s full potential in healthcare.

Yann LeCun, Meta’s Chief AI Scientist and Turing award winner, is an advisor to Nabla.

Engineering at Nabla
Engineering at Nabla is lean, fast-moving, and deeply technical. Our teams span machine learning, native desktop applications, and platform infrastructure to deliver AI into clinical settings reliably and at scale.

Your Team
At Nabla, product development is led jointly by Engineering and Product, and organized into cross-functional squads, each focused on a specific product area. Squads bring together product managers, designers, engineers of different profiles, and domain experts, and operate with a high level of ownership.

As a Senior FrontEnd Engineer, you’ll join one of these squads and contribute end to end to a specific part of the product.

What You’ll Do
As a Senior Front-End Engineer, you will lead the development of high-impact user experiences across our web apps, desktop apps, browser extensions, and mobile interfaces. You will set the standard for UI quality and performance, and play a central role in evolving our design system, architecture, and tooling.

You Will

• Build and lead the development of complex front-end features using React, TypeScript, and Tailwind
• Drive architecture and technical decisions around shared UI libraries and front-end performance
• Partner with Design to deliver intuitive, polished, and accessible experiences
• Help scale our apps across web, mobile (Capacitor), and desktop (Electron)
• Collaborate closely with Product, ML, and Back-End teams to ship full-stack features
• Mentor other engineers and contribute to team-wide best practices

To Give You a Sense Of The Impact

• Nabla processes 10 billion tokens/month with LLMs
• Every week, hundreds of thousands of clinical notes are automatically generated and synced with EHRs, saving thousands of hours for clinicians
• Our apps support real-time use in high-stakes clinical environments

Your DNA

• You have 5+ years of experience in front-end or full-stack development, with a focus on modern web technologies
• You have deep expertise in React, TypeScript, CSS architecture, and performance optimization
• You think in design systems and build for reusability and consistency
• You thrive in cross-functional environments and love turning user needs into polished interfaces
• You write clean, maintainable code and help others do the same
• You communicate clearly in English
• Bonus: experience with mobile apps, Electron, accessibility, or healthcare products

Our stack

• Frontend: TypeScript, React, Tailwind CSS, Swift, Rust, Electron.
• Backend: Kotlin / JVM, GraphQL, PostgreSQL.
• ML & Infra: Python, PyTorch, Slurm, GCP, Terraform, Kubernetes.

Where you’ll be based
Our offices are based in Paris 3e (Arts & Métiers). Our flexible hybrid policy allows 1-2 remote days per week, plus 1-2 weeks fully remote per year.

Benefits
Just like we’re dedicated to supporting doctors’ well-being, ensuring yours is a top priority. We firmly believe that by prioritizing your well-being, we support you to excel in your work.

Here Are The Benefits You Get When Joining Nabla

• Stock ownership
• 100% healthcare coverage
• Meal vouchers
• Public transportation costs covered at 50%
• Exercise class during the workday: Yoga, running, pilates, HIIT
• Unlimited budget for book purchases, so you can continue to learn about Front-End, Design, and Healthcare
• Culture of trust & accountability — your output matters more than your clock-in time

Life at Nabla
When you become a part of our company, you join a team of excellence-driven, curious, and genuinely kind individuals. Together, we're committed to making clinicians' lives easier and improving healthcare experiences for everyone. We believe in a world where clinicians can focus on what they were trained to do - caring for their patients, and where no patient feels their visit was rushed.

We come to work excited to leverage AI to do more for clinicians. We’re obsessed with our users’ satisfaction and we actively seek out opportunities to engage one-on-one with clinicians to understand how Nabla can better help. We consistently look for ways to improve and do not shy away from doing the work to excel. Whether it’s a feature our users asked for, or a new article for our blog, we prioritize collaboration to deliver exceptional outcomes.

We love having fun as much as we love work. Our #nablabla channel is as active as our #feature-show-off channel, we exercise during the work day at least 3 times a week (yoga, running, pilates, or HIIT, your choice!), enjoy regular off-sites to gather the team, and travel to see each other in places like NY, Paris, San Francisco, and many other vibrant cities. Oh, and we’re constantly snacking on chocolate or nuts!

If this sounds like an environment you’ll thrive in, we look forward to reading your application!

Our Values at Nabla
Joining Nabla means being part of a team that shares a commitment to excellence, humility, growth, and inclusion.

Every day is a new chance to excel
We aim for nothing less than the best and are willing to put in the effort and dedication required to exceed standards. We learn from yesterday’s failures and do better every day.

Stay humble
There’s no place for ego in our team. Our collective success is more important than individual achievements. We see humility as wisdom — keeping focus on the bigger picture.

Feedback is a gift
We embrace feedback and foster a culture of trust and respect that helps everyone grow. We communicate openly about both achievements and challenges, and we actively involve each other in finding solutions.

Committed to diversity
We recognize the ongoing challenge of diversity in tech. Our responsibility starts with fostering an inclusive environment where everyone feels empowered to be their authentic selves and do their best work.

Diversity & Inclusion
Diversity and inclusivity are fundamental values at Nabla. We embrace individuals from various backgrounds, including race, gender, educational history, sexual orientation, and beyond.

As an equal opportunity employer, we actively seek out and welcome applicants from diverse backgrounds, believing that a wide range of perspectives enriches our team and enhances our ability to innovate and thrive.

Avoid recruitment scams: Stay safe and informed

There is an active employment scam which is now using Nabla to collect personal information or financial scams. If you’re contacted by a Nabla recruiter, please ensure whomever is contacting you truly represents Nabla and is utilizing a nabla.com email address. We will never ask for the exchange of any money or credit card details during the recruitment process. Nabla utilizes a hiring platform for all applications; please be aware of any suspicious email activity from people who could be pretending to be recruiters or senior professionals at Nabla. You can find more information following this link.

Nabla does not accept unsolicited CVs from recruiters or employment agencies in response to the Nabla Careers page or a Nabla social media post. Any unsolicited CVs, including those submitted directly to hiring managers, are deemed to be the property of Nabla.

This role is eligible for our hybrid work model: Two days in-office
SDET (Software Developer Engineer in Test)
Our Technology team is the backbone of our company: constantly creating, testing, learning and iterating to better meet the needs of our customers. If you thrive in a fast-paced, ideas-led environment, you’re in the right place.

Why this job’s a big deal?
The travel industry is ever evolving and Priceline is at the forefront. As pioneers, we are creating new and exciting ways for our customers to experience {big deal} moments. As a member of our fast moving group, you will build groundbreaking technology to enhance our testing capabilities for new and existing products.

In This Role You Will Get To

• Join the Connectivity, Optimization & Commercial Operations product group, a core group within our Flights Technology organization. One of the goals of this product group is to integrate and maintain a large number of airline APIs into an inhouse supply platform, while achieving a harmonized level of functionality and content across all integrated airline APIs.
• Work across a portfolio of applications that form the supply layer of our platform in the areas of flight search, booking, payment, servicing and reconciliation.
• Define architecture, design and implementation of Test Automation Solutions.
• Participate in setting up Automated Testing Environment for multiple api/microservices based applications
• Design and build test cases and leverage existing Automation Frameworks to build new test scripts while maintaining existing test scripts as per product requirements.
• Translate manual regression test cases into automated test scripts.
• Lead/implement testing for large-scale, web applications tools, and/or software.
• Advocate best practices to team members and development teams.
• Collaborate with Development Managers, Product Managers, Software Engineers and other teams to ensure the highest quality of the product by architecting automation focused solutions.

Who You Are

• Bachelor’s Degree in Computer Science or Information Technology or related field
• 3-5+ years of proven experience in defining, developing and owning test automation infrastructure for a large enterprise
• Solid foundation in software testing fundamentals
• Good balance between manual and automated testing
• Experience working with APIs from various external providers
• Experience with using Postman or similar testing tools for grpc, SOAP, REST API testing is a must.
• Knowledge of schema validation/responses/Error codes of the APIs
• Fluency in a variety of languages, frameworks and tools for automated testing solutions such as JavaScript, Node.js, Express.js, Java, TestNG, Rest Assured, Selenium, Cucumber, MongoDB, REDIS, Saucelabs, Browserstack
• Fluency in Elixir or any other functional programming language is a plus
• Ability and interest in developing test automation frameworks from scratch
• Be able to contribute in maintaining continuous integration and deployment solutions (Argo CD, GitHub Actions etc.) that served large software engineering organizations
• Developing test strategies, test plans based on user stories, functional specifications, use cases, and/or business requirements
• Strong foundation with test case management tools (TestRail, TM4J, QC, etc.)
• Knowledge of advanced SQL and relational database concepts
• Familiarity with load/performance testing tools such as JMeter and other open source javascript based libraries
• Illustrated history of living the values necessary to Priceline: Customer, Innovation, Team, Accountability and Trust.
• The Right Results, the Right Way is not just a motto at Priceline; it’s a way of life. Unquestionable integrity and ethics is essential.

Who We Are
WE ARE PRICELINE.
Our success as one of the biggest players in online travel is all thanks to our incredible, dedicated team of talented employees. Priceliners are focused on being the best travel deal makers in the world, motivated by our passion to help everyone experience the moments that matter most in their lives. Whether it’s a dream vacation, your cousin’s graduation, or your best friend’s wedding - we make travel affordable and accessible to our customers.

Our culture is unique and inspiring (that’s what our employees tell us). We’re a grown-up, startup. We deliver the excitement of a new venture, without the struggles and chaos that can come with a business that hasn’t stabilized.

We’re on the cutting edge of innovative technologies. We keep the customer at the center of all that we do. Our ability to meet their needs relies on the strength of a workforce as diverse as the customers we serve. We bring together employees from all walks of life and we are proud to provide the kind of inclusive environment that stimulates innovation, creativity and collaboration.

Priceline is part of the Booking Holdings, Inc. (Nasdaq: BKNG) family of companies, a highly profitable global online travel company with a market capitalization of over $80 billion. Our sister companies include Booking.com, BookingGo, Agoda, Kayak and OpenTable.

If you want to be part of something truly special, check us out!

Flexible work at Priceline
Priceline is following a hybrid working model, which includes two days onsite as determined by you and your manager (ideally selecting among Tuesday, Wednesday, or Thursday). On the remaining days, you can choose to be remote or in the office.

Perks & Benefits At Priceline
Our benefits are designed to support your health, wellbeing, and life inside and outside of work. Eligible Priceliners have access to:

Health & wellness coverage
including medical, dental, vision, and mental health resources

Generous time off
including PTO, holidays, a company-wide Priceline Pause reset week, and paid volunteer days

Work/life support
including the ability to work up to 4 weeks per year from anywhere, parental leave, dependent care and family support resources, Summer Fridays, and office perks like stocked kitchens and catered meals (varies by location)

Financial security programs
such as retirement plans with company contributions, life and disability coverage, and tax-advantaged accounts

Signature travel perks
including employee-only discounts on hotels and flights, VIP deals, and Big Deal Bucks credits

Additional perks & discounts
like travel and partner discounts, tuition support, legal support, and pet benefits

A people-first culture
with Employee Resource Groups (ERGs), social events, recognition programs, and service awards that help you connect, grow, and celebrate together

Specific benefits and programs vary by location.
Inclusion is a Big Deal!
To be the best travel dealmakers in the world, we believe our team should reflect the broad range of customers and communities we serve. We are committed to cultivating a culture where all employees have the freedom to bring their individual perspectives, life experiences, and passion to work.

Priceline is a proud equal opportunity employer. We embrace and celebrate the unique lenses through which our employees see the world. We’d love for you to join us and help shape what makes our team extraordinary.

Applying for this position
We're excited that you are interested in a career with us. For all
current employees
, please use the internal portal to find jobs and apply.

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