Senior Software Engineer Backend - Cloud

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:

You will be joining a highly impactful, cross-functional foundational team that sits at the intersection of our Identity, Infrastructure, and Localization platforms. We build and maintain the core systems that securely authenticate our users, scale our backend infrastructure, and power our global reach through our internal translation framework.

As a Senior Software Engineer, Backend, you will join the Cloud Infrastructure Backend team, responsible for the foundational systems that securely power Truecaller for over 450 million users worldwide. You will collaborate on our most critical identity and core infrastructure domains, including our Authorization systems (handling peaks of 2.7M requests/second), our internal phone verification service (processing 51k RPS with sub-5ms p99 latency), and our massive business event ingestion pipelines (producing up to 676k events/sec).

In this role, you will also take primary ownership of our internal Translation Framework—a sophisticated CI/CD orchestrator that seamlessly integrates AI translations and linguist feedback to localize our platform globally. Writing primarily in Scala and Golang, you will solve complex distributed systems challenges at a massive scale, building and optimizing features to ensure our core infrastructure remains secure, resilient, and highly performant.

What you’ll do:

• Design and develop high-volume, low-latency services and cope with the challenge of working in a distributed environment.

• Operate mission-critical services at high availability.

• Collaborate across business units and drive solutions.

• Explore new solutions and technologies.

• Build a scalable and reliable system.

What you bring in:

• 5+ years of backend experience with languages like Java, Scala, or Go, along with the willingness and excitement to work primarily in Scala and Golang.

• Experience of working with scalable, highly available, real-time distributed systems

• Experience of working with non-relational databases

• Good understanding of data structures and algorithms

• Mentoring/ Leadership skills

• Excellent communication skills in English.

• Ability to thrive in a dynamic, fast-paced environment.

It would be great if you also have:

• Domain experience in Localization systems or Identity/Authentication protocols (e.g., OAuth, SSO, IAM).

• Experience building systems in the Google Cloud Platform

• Experience with virtualization environments, e.g., Docker

• Experience with systems for managing containerized applications, e.g., Kubernetes

• Experience with Cassandra and Kafka.

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.