Senior ML Engineer

Join Truecaller – The place where innovation meets impact!

Truecaller's mission is to build trust in communication by making it safer, smarter, and more efficient. Born in Sweden, trusted by the world, and here’s why we stand out:

• We are trusted by over 450 million active users every month across 190+ countries
• We identify over 15 billion calls daily, helping users avoid spam and scams
• We are powered by a team of 450+ employees from 45+ nationalities

We always look for people who take initiative, own their work, and keep raising the bar. An entrepreneurial mindset matters here, especially when it turns bold ideas into real actions. We stay collaborative and focused, always searching for smarter paths forward. If you want to make an impact and grow with a team that inspires millions, you’ll fit right in.

The role:

In the Search Team, we are responsible for Spam Detection, AI Identity, Name Resolution, and Fraud Detection. By accurately assigning names to phone numbers, detecting spam and fraud, and providing contextual caller information, we enhance users' trust and safety, empowering them to make informed decisions about incoming calls and directly supporting Truecaller’s mission of enabling safe and trusted communication.

As a Senior Machine Learning Engineer in the Search team, you will play a key role in building and scaling data pipelines, frameworks, and ML models that help us better understand our users and make smarter product decisions. You’ll work hands-on to design robust, scalable solutions that power a self-serve analytics platform for product teams, enabling faster insights and data-driven development across the company.

In this role, you’ll also take ownership of optimising the training and deployment of machine learning models to be fast, reliable, and cost-efficient. You will be at the forefront of improving data privacy and customer experience. This includes collaborating closely with data scientists, analysts, and mobile/product teams to establish best practices, tooling, and workflows for efficient ML development and deployment.

You’ll be expected to help push the team to the cutting edge of ML training and deployment.

What you’ll do:

• Understand current and future needs of developers and the organisation, and define a roadmap with your manager
• Enable teams across Truecaller to deploy ML models and data pipelines quickly and cost-effectively
• Optimise ML models and act as the go-to expert for model development and deployment
• Maintain and improve high-throughput data pipelines, delivering billions of events reliably within SLAs
• Support teams in building and optimising complex pipelines and ML workflows
• Collaborate with data scientists, analysts, and other teams to bring models and insights into production
• Develop tools and frameworks to improve the data and ML platform
• Work on large-scale initiatives, including ML platforms and streaming use cases
• Establish best practices for software, data, and ML development
• Stay up to date with ML trends and drive continuous innovation

What you bring in:  

• Degree in computer science or equivalent
• 5+ years of experience in machine learning engineering, with a focus on deploying ML models in production environments.
• A strong understanding and experience to optimise feature engineering, model training, and model deployment.
• Hands-on experience deploying ML models.
• Strong understanding of machine learning frameworks (TensorFlow, PyTorch, ONNX) and their deployment.
• Understanding of both Android and iOS development and how that impacts ML model deployment and usage.
• Experience working with orchestration tools (ex, Airflow).
• Experience working in a big data environment (ex, Hadoop).
• Experience building complex ETL pipelines.
• Experience working with cloud providers such as GCP, AWS, or Azure
• Strong programming skills in Spark with Scala and Python
• Deep understanding of internal of Spark with experience in optimizing Spark jobs
• Strong understanding of Software Engineering practices and principles.
• Have worked on building and optimizing CI/CD pipelines.
• Strong communication and collaboration skills, with the ability to work effectively across different teams and disciplines.
• A customer-focused mindset.
• Excellent communication skills in spoken and written English.

It would be great if you have

• Hands-on experience on Google Cloud Platform
• Experience working with messaging systems like Kafka
• Hands-on experience with streaming platforms and applications working with Kafka streaming, Flink or Spark streaming
• Experience managing a data warehouse in BigQuery.
• Solid experience working with  Microservices architecture.
• Experience with AutoML tools (for ex, H2O.ai or Auto-Keras).
• Experience enabling generative AI experimentation, fine-tuning, and deployment.
• Experience with Go.

What we offer: 

We support growth through learning resources, leadership programs, mentoring, and real hands-on work. People can move between teams and projects to build new skills and keep things interesting. We offer clear internal mobility and a transparent path for progression, with leaders who stay involved and provide guidance throughout the year. In addition, you will benefit from:                                                                                                                                                        

• A comprehensive compensation package: We offer a competitive salary, 30 days of paid vacation, private health insurance, parental leave top-up, pension, and wellness contributions.
• Modern tools to do your best work: Choose your preferred computer and phone within our budget, so you can work comfortably and efficiently.
• A people-focused office culture: We value in-person collaboration and follow an office-first model, with some flexibility. Our offices offer a vibrant environment with opportunities to learn, connect, and recharge, from breakfast, lunch, and well-stocked snack stations and quiet spaces to team activities such as movie nights, tech meetups, and cultural events. There's something for everyone.
• Truecaller’s “Lab Days” offer a space for imagination: 5 times per year for 3 days, where everyone steps away from their normal tasks to explore new, bold ideas and build things they’ve always wanted to. It’s a space where curiosity leads the way, and prototypes take shape. Some concepts even make it into production, and a few have grown into real features used by millions today. Lab Days allow you to be creative, learn fast, and help shape Truecaller's future.

Come as you are:
Truecaller is committed to building a diverse and inclusive team. We believe that a wide range of backgrounds, perspectives, and experiences strengthens our products and our culture. No matter where you're from, what language you speak, or how you identify,  we value what makes you unique and would love to get to know you. 

Check out Life at Truecaller - Behind the code:  

https://www.instagram.com/lifeattruecaller/

Sounds like a great opportunity?

We will fill the position as soon as we find the right candidate, so please send your application as soon as possible. As part of the recruitment process, we will conduct a background check.

We only accept applications in English.