Senior Software Engineer (Rendering)

Smartly; Helsinki; Hybrid; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Equity options

Healthcare package

Hybrid work model

Work abroad up to 30 days

Job summary

Smartly in Helsinki is seeking a Senior Software Engineer specialized in backend and full-stack development to drive a flagship rendering engine. You will own backend projects, design APIs, and push scalable solutions across distributed systems.

The role emphasizes high availability, performance, and collaboration with Product and Infra, with hybrid work3 days in the Helsinki office and global impact across our platform.

Qualifications

• Minimum of 6 years of experience building robust distributed web applications.
• Backend focus with Node.js, Typescript and PostgreSQL; openness to other tech.
• DevOps experience including Kubernetes and messaging queues is a plus.
• Autonomous, proactive mindset with production problem-solving skills.
• Strong analytical skills to translate requirements into services.
• Excellent English communication and cross-team collaboration.

Responsibilities

• Own vertical slices of the rendering platform with end-to-end responsibility.
• Deliver infrastructure improvements and features in small increments.
• Define and own API contracts for internal and external stakeholders.
• Document services and communicate offerings to other teams.
• Lead technical design decisions with focus on availability and performance.
• Collaborate with Product and Infrastructure to meet global demand.
• Mentor teammates through code reviews and architecture guidance.
• Drive projects forward independently and clear roadblocks quickly.

Skills

6+ years exp

Backend development

Node.js

Typescript

PostgreSQL

Kubernetes

Messaging queues

English fluency

Hybrid work

Tools

Docker

GitHub Actions

Public APIs

Job description

Are you an ambitious backend-oriented Fullstack Engineer ready to take on new challenges and grow exceptionally in your career? Join our team Render as a Senior Software Engineer and be at the forefront of transforming our Creative production tooling !

About the Team:

Smartly proudly houses Render, responsible for a flagship part of Smartly's product offering, having an extensive impact on the company's ambitions for the future. Our customers rely on our creative production engine to generate tens of millions of advertising creatives, and your future team is at the core of this massive operational effort.

We are agnostic about technology and always aim to choose the best tools for the job. Our services run on Node.js, orchestrated by Kubernetes, and we manage public APIs that serve as the backbone for internal services across the company. To analyze the performance of our creatives across social platforms, we integrate with robust BI tools including Snowflake, Redash, and Google. We ensure reliability and speed through automated pipelines using GitHub Actions.

Our work is defined by immense scale and innovation. During peak times, our systems have rendered 16 billion (16 000 000 000) images monthly on hundreds of servers. We focus heavily on evolving our creative group’s capabilities while reacting to real-time customer demand and feedback.

As a Senior Software Engineer, You Will:

• Own vertical slices of our rendering platform, taking end-to-end responsibility for backend projects and distributed systems.
• Find the smallest possible increments to deliver infrastructure improvements and features to customers as quickly as possible.
• Define, design, and own API contracts for both internal and external stakeholders..
• Documenting our services and communicating our offerings to other teams within Smartly
• Lead technical design decisions and tradeoffs, prioritizing high availability, performance, and code quality in every release.
• Partner closely with Product and Infrastructure stakeholders to ensure our rendering engine meets customer demand at a global scale.
• Act as a mentor and technical guide, elevating the team through constructive code reviews and providing guidance on complex backend architecture.
• Drive projects forward independently, proactively identifying performance bottlenecks and dispatching roadblocks efficiently..

What We’re Looking For:

• Minimum of 6 years of experience in building robust, complex, and distributed web applications
• Deep expertise in backend development using modern technologies. We use mostly Node.js, Typescript and PostgreSQL but we are open to hearing more about technologies used by you
• DevOps experience including competency with Kubernetes and messaging queues is considered as an asset
• A proactive and autonomous mindset, showing persistence when solving deep technical hurdles in production environments.
• Strong analytical skills to dissect product requirements into actionable technical tasks and well-architected services.
• Excellent communication skills in English, with the ability to explain the connection between infrastructure work and the company vision.
• Motivation for solving customers' problems and delivering value to customers at a fast pace
• Ability to work in a hybrid capacity from our Helsinki office 3 days a week (or more if you like).

What We Offer You:

• Inclusive Culture: Join a team of over 850 Smartlies representing more than 60 nationalities across 24 locations in 13 countries, we foster a culture built on trust, transparency, and open feedback.
• Global Impact: Be part of a company making a global impact, directly influencing our customers and business growth.
• Wellbeing Focus: Enjoy generous healthcare packages, mental health services, and a healthy work-life balance with paid holidays and family leave.
• Total Rewards: Benefit from equity options, performance-based rewards, competitive compensation, and ample career development opportunities.
• Hybrid Workplace: We work in a hybrid model, balancing office and remote work, with the option to work abroad for up to 30 days.

Smartly is committed to being the best place to work for growth-minded individuals to thrive - explore more in our Culture Handbook !

What to Expect from Our Recruitment Experience:

• Meet your Recruiter: Get to know each other and learn about working at Smartly.
• Meet the Team Lead: Gain deeper insights into your future team.
• Meet the Team in Technical Interviews: Engage in an interactive coding interview followed by a discussion around Systems Design and Architecture.
• Meet the Leadership in a Final Meeting: A brief discussion with our VP of Engineering.

#LI-JF2 #LI-Hybrid

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.