Smartly.io

Help Shape the Future of Advertising with AI

Are you passionate about building next-generation products with LLMs and generative AI? Do you want to work on technology that’s transforming how brands connect with people? Join the Conversational Ads team as a Senior Software Engineer.

Our mission is to create AI-powered features that help marketers easily craft, adapt, and optimize high-performing ads using the latest advances in text, image, video, and structured data. This isn’t theoretical research, we’re shipping real tools that drive real impact and blending technical innovation with real-world applications. In this role, you can help us bring generative experiences to life, enabling more meaningful, creative, and effective conversations between brands and their audiences.

If this sparks your interest and you would like to help us push the boundaries of what's possible with AI in advertising - let’s talk!

Stack: Typescript, React, Node.js, Python, Langchain, PostgreSQL, Redis, OpenAPI, Kubernetes.

Here’s what our people say about the team:

“I mostly enjoy how driven, passionate, and committed our team is to creating great products and staying close to our customers - and the autonomy we have to do so.”

“For me, it feels like we work with a start-up spirit: we love building cool things, aren’t afraid to break things to discover something even better, are willing to admit our mistakes, and are quick to iterate, fix issues, and make our customers happy.”

“I personally love the collaborative environment, where developers speak up when something doesn’t seem right instead of just blindly implementing it. In some companies, the process is very waterfall-like, with development as the final step and no input beforehand - here, it’s different.”

What You’ll Do:

• Collaborate with product, engineering, and design to translate user problems into viable AI-driven solutions.
• Build AI-powered product features using LLMs and foundation models for text, image, and video through agentic workflows. You will be part of the full development lifecycle: from concept and experimentation to deployment and monitoring.
• Build internal tooling and abstractions to enable scalable, safe, and efficient use of GenAI technologies.
• Contribute to the evolution of our platform's AI/LLM architecture and best practices, helping to establish standards and reusable solutions.
• Stay current with fast-moving advances in LLMs, multimodal AI, and prompt engineering,and bring that knowledge into practice.
• Apply and enhance your soft skills through working closely with your colleagues and our customers. Doing knowledge shares, running productive meetings, and pair programming/debugging are just some ways we grow.
• Be part of an international, dynamic team with people who don’t take themselves too seriously and love to help each other.

What We’re Looking For:

• Several years of experience developing production grade software using cutting edge technologies
• Experience with micro-services architecture and cloud infrastructure (Kubernetes, AWS)
• Experience with AI/LLM-based systems
• Strong interest in the capabilities, limits, and trade-offs of generative AI, including cost/performance, hallucinations, safety, and latency.
• Comfortable collaborating cross-functionally and translating ambiguous problems into scoped, testable engineering initiatives.
• Strong product intuition and user-centric mindset - you understand that AI is one tool among many to solve our customers’ problems.
• Ability and willingness to work in a hybrid capacity from our Helsinki office 3 days a week.

Bonus Points for:

• Prior work with Agent frameworks
• Familiarity with multimodal AI systems (text-image, text-video, or audio integration)
• Experience developing products using Machine Learning
• Python knowledge
• Exposure to vector databases, semantic search, and orchestration frameworks (e.g., LangChain, Flowise, etc.).
• Open-source contributions to LLM or GenAI-related tools

What We Offer You:

• Inclusive Culture: Join a diverse team of over 750 Smartlies from 60+ nationalities across 24 locations in 13 countries. We foster a culture built on trust and open feedback.
• Global Impact: Work on solutions that directly influence advertisers worldwide and drive business growth.
• Wellbeing & Work-Life Balance: Benefit from comprehensive healthcare, mental health services, paid holidays, and family leave.
• Total Rewards: Enjoy equity options, performance-based rewards, competitive compensation, and career development opportunities.
• Hybrid Workplace: Flexibility to work in a hybrid model, with the option to work abroad for up to 30 days per year.

At Smartly, we are committed to creating an environment where growth-minded individuals can thrive. Explore more in our Culture Handbook!

#LI-Hybrid #LI-JF2

About Smartly

Smartly is the AI-powered advertising technology company transforming ad experiences for brands and their consumers. Our comprehensive advertising platform seamlessly integrates the capabilities of media, creative, and intelligence to power more than 800 billion impressions and generate more than 300 billion creatives annually, delivering tangible business outcomes for brands and advertisers.

Smartly is the only company in the industry recognized as a Leader in The Forrester Wave: Creative Advertising Technologies with PwC validating the results it delivers for brands. We manage creative and media for 700+ brands worldwide and $6B in ad spend across the largest media platforms, including Facebook, Google, Instagram, Pinterest, Snap, and TikTok. Our end-to-end technology, unmatched access to media platforms and exceptional customer service help Fortune 500 brands to reach and engage consumers and learn what performs best.Smartly is a multinational and diverse team of 750+ Smartlies from 60+ nationalities, working in 13 countries. Together, we want to create and maintain an inclusive environment where everyone feels respected and heard. Our Diversity, Equity & Inclusion approach is at the heart of it.

Visit Smartly to learn more.