Debmalya Pan

Senior Software Engineer

Bangalore, Karnataka, India7 yrs 7 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

Led teams to build high-impact streaming pipelines.
Improved customer segmentation from 44% to 96%.
Saved $120 daily through operational excellence.

Stackforce AI infers this person is a Backend-heavy Software Engineer in E-commerce and Fintech sectors.

Contact

Skills

Core Skills

JavaMicroservicesData EngineeringData Visualization

Other Skills

APM MonitoringAmazon Web Services (AWS)Apache AirflowApache KafkaApache SparkAzure Cosmos DBBPMNBashBigQueryCCamunda BPMCloud Cost ManagementCloud StorageConsumer ManagementCyberduck

About

Seasoned senior software engineer having 6 years of total experience in backend development of micro-services architecture having sound knowledge of Design Patterns, Low Level Design, System Design and SOLID principles. Proven ability to collaborate with stakeholders and drive high-impact initiatives. Seeking to leverage solid skills in product development to deliver quality solutions within deadlines and take ownership of projects by converting design to code. Scalable to any team.

Experience

7 yrs 7 mos

Total Experience

1 yr 6 mos

Average Tenure

3 yrs 11 mos

Current Experience

Walmart global tech india

2 roles

Senior Software Engineer

Promoted

Dec 2024 – Present · 1 yr 6 mos · Bengaluru, Karnataka, India · Hybrid

Domain: International Tech - Walmart Ads
Platform: Sponsored Products & Display - Campaign & Measurement
Backend Tech Stack: Java, Spring Boot, Microservices, AzureSQL, ElasticSearch, Memcached, Kafka, REST, BigQuery, Scala, Spark, Airflow
1. Led a team of 3 engineers to build streaming pipelines using Kafka, Spring Cloud Stream, Kafka Connect Sink (to GCS) for ads attribution based on time intervals.
2. Built a data reconciliation pipeline to attribute offline store transactions with online ads using BigQuery, Scala, Spark & Airflow DAGs in order to improve W+ customer segmentation from 44% to 96%.
3. Playing a crucial role in enhancing the existing system to incorporate multi-tenancy as well as multi-lingual support for International markets.
Responsibilities:
Coding, PR Reviews, Architecture & Design Reviews, Documentation, Infra Procurement & Deployment, On-call Support, Cloud Cost Management, Solution Security Plan, APM Monitoring, Consumer Management, Engineering & Operational Excellence activities, Mentorship, Interview Panel, Scrum Master.

Apache KafkaGitScalaApache AirflowSpring Cloud StreamSpring Boot+11

Software Engineer III

Jul 2022 – Dec 2024 · 2 yrs 5 mos · Bengaluru, Karnataka, India · Hybrid

Domain: US Omni Tech - Marketplace
Platform: Partner Engagement Platform (aka Partner Services) (T-1)
Backend Tech Stack: Java, Spring Boot, Microservices, RDBMS (Oracle, PostgreSQL), NoSQL (Azure Cosmos DB, ElasticSearch, Cassandra), Memcached, Kafka, Telemetry (Splunk, Dynatrace, Prometheus, Grafana), BPMN (Camunda), GraphQL
Architectural Patterns: CQRS, Multi-tenant, BFF
Code Design Patterns: Command, Template Method, Strategy, Facade, Factory, Visitor etc
1. Owned several key areas/pipelines end-to-end notably, Inform Act Seller Certification, Seller Tiering, Seller Enforcement as well as a Tier-0 service which serves 15k+ TPS daily.
2. Built various tenant-agnostic micro-services using GraphQL such as Badges, Preferences, Agreements and Walmart Programs as a service.
3. Played an integral role in the overall design and implementation of business initiatives such as Seller Loan & Walmart Fulfillment Services 2.0 (Cross Border Trade and Global Trade).
4. Built change-data-capture pipeline to migrate 1M seller data from Oracle to CosmosDB with zero downtime.
5. Built ingestion pipeline and APIs to deliver agreement search capability on Seller Center Home Page by consuming CosmosDB change feed and loading to ElasticSearch.
6. Saved $120 daily by tuning the scaling, CPU cores and memory utilization parameters of k8s pods as part of operational excellence.
Serving ~ 2B requests/day across Walmart partners in various geographies (US,MX,CA,CL).

Apache KafkaPython (Programming Language)GrafanaGitGraphQLElasticsearch+15

Target

Engineer

Nov 2021 – Jul 2022 · 8 mos · Bengaluru, Karnataka, India · Hybrid

Domain: Stores & Supply Chain
Project: Global Imports (Transportation - First Mile) (T-3)
Backend Tech Stack: Java 8, Spring Boot, Microservices, RDBMS, ElasticSearch, Kibana, Kafka
1. Migration from legacy systems to microservices to improve scalability and performance.
2. Sharded existing S3 bucket having 8.5M objects to multiple buckets based on vendors to reduce latency.
3. Created packet status dashboard to track data packets and log metrics for users using ElasticSearch and Kibana.
4. API integration and business logic implementation for calculation of dynamic transportation rates and refund of incorrect tariff/duty charged by US Customs.
5. API development to support shipping diversions of cargo and update the same to US Customs.
6. Business rules implementation to enhance compliance metrics by 40% with Partner Government Agencies (PGA)

Apache KafkaSpring Data JPAGrafanaJava Object Oriented Querying (jOOQ)GitElasticsearch+14

Falabella india

Engineer

Nov 2020 – Oct 2021 · 11 mos · Bangalore Urban, Karnataka, India · Hybrid

Domain: Logistics & Supply Chain
Product: Fulfilled By Falabella (Inbound Orchestration)
Description: FBF Inbound Orchestrator helps third-party sellers to ship products to Falabella warehouses and also takes care of appointments and transport options.
Backend Tech Stack: Java 9, Spring Boot, Microservices, Pub/Sub, RDBMS
1. Integrated with Logistics Catalog to store product and warehouse configurations.
3. Implemented Spring Cache to store access token as well as improve performance of APIs.
4. Implemented restriction logics for Warehouse Units Limits, Value Added Services and Transport Options.
5. Implemented Item Distribution API to create distribution per warehouse node for given set of qualified products.
6. Developed APIs for configuring business restrictions via excel file upload.
7. Experience in TDD writing JUnit5 Tests using Mockito and using Sonar to maintain 85% code coverage.

OpenAPI Specification (OAS)Spring Data JPAGitKubernetesSpring BootGradle+8

Kuliza

Associate Software Developer

Aug 2019 – Nov 2020 · 1 yr 3 mos · Bengaluru Area, India · On-site

Domain: FinTech
Product: Overdraft Loan Application for SCB-Kenya
Description: SC-Biz is a digital overdraft loan application for Standard Chartered Bank, which focuses primarily on providing unsecured loans to mid-size businesses in Kenya, Africa.
Backend Tech Stack: Java 8, Flowable (BPMN), Spring Boot, RDBMS, Microservices
1. Integrated TransUnion APIs to check credit bureau and added business logic to expedite
credit screening process for loan application.
2. Developed a report generation framework using Java 8 Streams, Multi-threading,
Custom Annotations, Reflection, Schedulers.
4. Implemented ETL feature to transform data from flat text files to database using Spring Batch.
5. Created BPM Workflow for CASA customers using Flowable
6. Added feature to suspend drawdown for customers as per Cooling off period business logic.
7. Implemented cron job automation in Control-M Framework using Shell scripts.
8. Implemented encryption at database table column level to secure sensitive customer info.

Spring Data JPAAmazon Web Services (AWS)GitSpring BatchSpring BootFlowable+8

Keysight technologies

Intern Tech 1

Sep 2018 – Jul 2019 · 10 mos · Kolkata Area, India · On-site

Domain: IxNetwork Framework (R&D)
Project: Network Analytics and Visualisation
1. Developed a data analytics dashboard in Grafana to study the behaviour of network where data is captured using INT packets.
Worked on implementing a plugin in IxNetwork for monitoring and analyzing In-band Network Telemetry data.
Technology Used: Grafana (Visualization), InfluxDB (NoSQL DB), .Net (Middleware), Powershell (Scripting)
2. Worked on implementing P4Import Wizard feature in IxNetwork.
Extended support to Barefoot Tofino Native Switches using P4 Backend and integrated it with IxNetwork.
Performed unit testing, end-to-end testing.
Technology Used: P4 (Open-source)