Sai Harsha Vellanki

Software Engineer

Bengaluru, Karnataka, India6 yrs 9 mos experience

Key Highlights

Built next-generation data connectors at Databricks.
Optimized data ingestion speed by 3.5× at Fennel.
Secured $14 million in deposits through EOR billing.

Stackforce AI infers this person is a SaaS-focused backend engineer with expertise in distributed systems and data streaming.

Contact

saiharshavellanki@gmail.com LinkedIn

Skills

Core Skills

Distributed SystemsDatabasesData StreamingPythonLow-level DesignApache KafkaGo (programming Language)

Other Skills

Rust (Programming Language)MySQLMongoDBData StructuresAlgorithmsSoftware DesignSoftware DevelopmentC++JavaDjangoShell ScriptingComputer ScienceCLinuxGit

About

Building next generation data systems that are fast, resilient, and designed to handle scale. Let's connect: topmate.io/sai_harsha_vellanki

Experience

6 yrs 9 mos

Total Experience

1 yr 10 mos

Average Tenure

1 yr 2 mos

Current Experience

Databricks

Member of Technical Staff

Apr 2025 – Present · 1 yr 2 mos · Bengaluru, Karnataka, India · Hybrid

Building next-generation data connectors as part of Lakeflow Connect

Distributed SystemsDatabases

Fennel (acquired by databricks)

Software Engineer

Nov 2023 – Apr 2025 · 1 yr 5 mos · Bengaluru, Karnataka, India · Remote

Worked on core streaming, storage and serving systems powering Fennel
Engineer #1 in India and among the first 10 hires globally
Owned data connectors for batch sources (MySQL, PostgreSQL, MongoDB, BigQuery, S3, Redshift) and real-time sources (Kafka, Kinesis, Pub/Sub, Webhooks)
Developed data sinks for S3, Kafka, and Snowflake
Optimized parquet-to-fennel data format conversion during ingestion, achieving a 3.5× speedup
Contributed to the open-source Rust Confluent Schema Registry library, optimizing it for high-throughput scenarios and reducing fetch latency for 10K records from 3.6s to 500ms
Improved point-in-time lookup performance for customer queries by reducing cost, improving data freshness, and decreasing latency
Enhanced Fennel’s job scheduler for improved robustness, scalability, and efficiency

Distributed SystemsData Streaming

Rippling

Software Engineer

Nov 2021 – Nov 2023 · 2 yrs · Bengaluru, Karnataka, India

Core-Billing Ownership: Responsible for the core billing component,
optimizing monthly billing workflows, implementing idempotent functionality
for scalability, and integrating new payment methods. Generated $360
million worth invoices between Jan-Sept 2023.
EOR Billing: Worked on creation of a dedicated service for EOR deposit
collection, securing $14 million worth deposits by September 2023. Managed
payment retries, refunds, and risk scenarios and perform SAAS billing for EOR
subscriptions
Billing Global Launch: Streamlined billing processes, eliminating PST-specific
logic for a consistent worldwide customer experience. Enhanced our internal
queuing system to support seamless operations across all timezones.

PythonLow-Level Design

Uber

2 roles

Software Engineer II

Mar 2021 – Oct 2021 · 7 mos

Played a key role in the Risk Decision Platform team, responsible for identifying and mitigating fraudulent user activities through the implementation of preventive measures.

Apache KafkaGo (Programming Language)