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I'm Zorawar Sachdev, a software architect and technical lead based in Stockholm. With over a decade of experience designing robust distributed systems, I build high-volume microservices and evolve data pipelines. I thrive on challenging problems and transforming complexity into clean, scalable solutions. I lead end-to-end backend initiatives with a CTO mindset, mentor agile teams, and strive to raise the bar for quality. I enjoy turning ideas into impact, scaling products from 1→∞, and positively influencing hundreds of millions of users through thoughtful engineering and collaborative leadership.…I'm Zorawar Sachdev, a software architect and technical lead based in Stockholm. With over a decade of experience designing robust distributed systems, I build high-volume microservices and evolve data pipelines. I thrive on challenging problems and transforming complexity into clean, scalable solutions. I lead end-to-end backend initiatives with a CTO mindset, mentor agile teams, and strive to raise the bar for quality. I enjoy turning ideas into impact, scaling products from 1→∞, and positively influencing hundreds of millions of users through thoughtful engineering and collaborative leadership.

Zorawar Sachdev

Back-End Developer, Full Stack Developer, Programmer, +4

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I'm Zorawar Sachdev, a software architect and technical lead based in Stockholm. With over a decade of experience designing robust distributed systems, I build high-volume microservices and evolve data pipelines. I thrive on challenging problems and transforming complexity into clean, scalable solutions. I lead end-to-end backend initiatives with a CTO mindset, mentor agile teams, and strive to raise the bar for quality. I enjoy turning ideas into impact, scaling products from 1→∞, and positively influencing hundreds of millions of users through thoughtful engineering and collaborative leadership.…I'm Zorawar Sachdev, a software architect and technical lead based in Stockholm. With over a decade of experience designing robust distributed systems, I build high-volume microservices and evolve data pipelines. I thrive on challenging problems and transforming complexity into clean, scalable solutions. I lead end-to-end backend initiatives with a CTO mindset, mentor agile teams, and strive to raise the bar for quality. I enjoy turning ideas into impact, scaling products from 1→∞, and positively influencing hundreds of millions of users through thoughtful engineering and collaborative leadership.

Available to hire

I’m Zorawar Sachdev, a software architect and technical lead based in Stockholm. With over a decade of experience designing robust distributed systems, I build high-volume microservices and evolve data pipelines. I thrive on challenging problems and transforming complexity into clean, scalable solutions.

I lead end-to-end backend initiatives with a CTO mindset, mentor agile teams, and strive to raise the bar for quality. I enjoy turning ideas into impact, scaling products from 1→∞, and positively influencing hundreds of millions of users through thoughtful engineering and collaborative leadership.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

French

Beginner

Swedish

Beginner

Work Experience

Technical Lead (Scala Developer) at Freelance

January 1, 2025 - November 1, 2025

Investigated distributed systems end-to-end; identified major debt and proposed refactors: Lagom, Akka → Pekko; functional stack (Cats Effect, FS2) and Kafka → AWS Kinesis. Addressed issues including weak idempotency, inconsistent strong consistency, multi-tenant fragmentation, rising costs from over-provisioning and heavy Akka usage. Proposed architectural redesign, multi-tenancy, Dead Letter Queues, batching, and reusable domain components; highlighted security gaps such as unauthenticated endpoints and unvalidated webhooks.

Senior Software Engineer: Backend, Premium team at Truecaller

December 31, 2024 - December 31, 2024

Spearheaded backend initiatives for 300M+ daily active users; built an in-house payments solution to reduce app-store fees and boost ARPU; designed microservices for payments and subscription lifecycle; implemented an event-driven architecture with high-throughput messaging and multiple gateways. Led data processing pipelines, database migrations (MariaDB → Cassandra) and cloud migration to GCP; performed code refactors (Java→Scala, DropWizard→Play, Scala 2→3, HTTP→gRPC) and moved toward a more functional style.

Senior Software Engineer: Backend at Truecaller

December 31, 2024 - December 31, 2024

Orchestrated Airflow-based workflows to increase fault tolerance, handling external failures due to 3rd-party downtimes by automating retries; authored extensive unit, integration and regression tests; supported tracing and monitoring on dashboards; evolved data pipelines for real-time streaming and automated monthly finance reports; assisted a critical database migration (MariaDB→ Cassandra) and the migration of services from on-prem to GCP.

Senior Software Engineer: Fullstack, Business & Premium teams at Truecaller

December 31, 2021 - December 31, 2021

Founding engineer (Backend & Android) for the Business team; built the first production microservice to interact with expensive 3rd-party APIs; designed a multi-layer caching mechanism and modular client library; redesigned the Paywall to improve conversions and contributed to revenue growth.

Senior Software Engineer & Tech Lead: Mobile at Truecaller

December 31, 2019 - December 31, 2019

Led the Fintech mobile initiative; scaled Pay from 0 to 100M+ users; mentored Android team; built a best-practices app; migrated from RxJava to Kotlin Coroutines; contributed to Truecaller Business mobile product.

Software Engineer: Mobile, Fintech Pay at Chillr (Truecaller Pay)

December 31, 2018 - December 31, 2018

Led Fintech team to retrofit and rebuild Chillr into Truecaller Pay; launched in under 3 months and achieved rapid growth; mentored across Sweden and India; contributed to major architectural improvements.

Software Engineer: Android at Chillr

December 31, 2017 - December 31, 2017

Rescued a spaghetti codebase; spearheaded a ground-up refactor; stabilized crashes and ANRs; contributed to the acquisition process.

Software Engineer: Fullstack at Aasaanjobs

December 31, 2016 - December 31, 2016

Developed two products (hyperlocal delivery & blue-collar job portal); offline-first approach; contributed to open-source MVP architecture templates; represented the startup at Google I/O and led AMP/Polymer integration.

Senior Software Engineer: Backend & Fullstack at Truecaller

December 31, 2021 - December 31, 2021

Founding engineer for Business & Premium initiatives. Built an in-house payments solution to reduce external fees, designed multi-layer caching to optimize costs, and shipped a modular client library reused across teams. Led the Paywall redesign driven by A/B tests to improve conversions; contributed to subscription tooling and data processing improvements. Achieved measurable product impact (e.g., increased recurring revenue per user).

Software Engineer: Mobile at Truecaller (Pay team, Chillr lineage)

December 31, 2018 - December 31, 2018

Led fintech efforts during the Chillr acquisition transition; launched Pay under tight timelines, handling substantial early volume and delivering across cross-functional teams with a focus on reliability and performance. Recognized for ownership and cross-team collaboration.