Senior Software Engineer
ARJUNASARATHY MURALIDHARAN
Freelance
Chennai,TN
8
years of professional experience
Summary
Result-oriented Senior Backend Engineer with over 4 years of enterprise product experience architectural mapping, constructing, and expanding scalable microservices, transaction infrastructure layouts, and high-throughput distributed architectures. Proficient in Java, TypeScript, Node.js, and Spring Boot ecosystems. Proven technical track record analyzing PACELC system design trade-offs, managing monolith-to-microservice structural migrations, configuring automated containerized environments, and leading delivery engineering components.
Work History
Independent Software Consultant & Engineer
1 Year- Distributed Video Ingestion Platform:
- Backend & Infrastructure: TypeScript (NestJS, Drizzle), Python (FastAPI, SQLAlchemy), Nginx, Docker.
- AI & Multimodal ML: CLIP, Llama 3, Florence-2, Multimodal RAG.
- Data, Messaging & Cloud: PostgreSQL (pgvector), AWS S3, Redis (BullMQ, ARQ).
- Architected an asynchronous, pollyglot microservice pipeline (NestJS & FastAPI) via AWS S3 and PostgreSQL (pgvector), enabling semantic natural language search over long-form video mapped to frame-accurate temporal seek-points.
- Transactional Ledger Engine:
- Backend & Infrastructure: Java (Spring Boot), Hibernate, Nginx, Docker, React(Tanstack), React-Native.
- Data, Messaging & Cloud: Redis, RabbitMQ, Psql.
- Modernized a legacy retail platform by designing a structural RDBMS migration strategy, deploying highly optimized relational database schemas and automated invoicing components that reduced operational accounting processing time by over 70%.
- Workflow Automation Architecture: Designed and deployed an automated scheduling orchestration engine integrated within a core content management platform, reducing end-to-end user confirmation workflows from days to hours.
Senior Software Engineer
1 Year 11 Months- Tech-Stack: Typescript, Express.js(inversify), Nginx, AWS S3, AWS DynamoDb, AWS EC2, postgres(sequlize), Redis, BullMQ, Stripe, Mailpit, Postmark, Mailgun, Git, Docker, Grafana.
- Core Billing Architecture: Designed and built the end-to-end billing system engine for the platform (SparrowDesk), covering card capture states, checkout processing flows, transactional invoicing systems, and automated credit logic layers.
- Asynchronous Messaging: Architected an asynchronous outbound notification and inbound ticket generation engine via IMAP protocols, utilizing secure OAuth-based mailbox authentication layouts to scale registration pipeline throughput by 42%.
- High-Level & Low-Level Design: Maintained structural platform integrity under explicit PACELC distributed system design constraints, owning the end-to-end design and development of single sign-on (SSO), data bulk imports, and quoted-text parsing modules.
- Micro service Migration: Led the structural migration of the subscription billing platform from a legacy monolith to a decoupled micro service architecture, reducing P99 latency by 85% from a ~2000ms baseline down to 300ms.
- Team Leadership: Managed and mentored a team of 3 engineers delivering core core subscription and account billing capabilities across all platform-registered organizations.
Software Engineer 2
1 Year 4 Months- Tech-Stack: Java, Spring Boot, Spring Batch, Postgres, Oracle, Hibernate, Kibana, RabbitMQ
- Compliance & Localization Engineering: Built high-availability, localized transactional compliance frameworks within the Growth Markets cross-platform division, aligning core software components to strict regional financial regulatory mandates.
- Secure Card Storage: Implemented secure, file-based data architectures for recurring transaction card management layers (Credential-on-File) within the Braintree Merchant SDK, introducing custom validation rules into the Auth & Capture Engine (ACE) with total operational test boundaries.
- Protocol-Level Propagation: Designed protocol-level transaction-code propagation mechanisms (Abecs Codes) across the acquirer network (Rede), Braintree modules, and internal merchant processing engines to optimize retry patterns and reduce payment network scheme fees by saving around $12M of card retry fees.
- Data Telemetry Ingestion: Engineered an event-driven anomaly detection and alert delivery platform utilizing specialized Python processing instances to ingest and track high-throughput Looker and BigQuery telemetry metrics, decreasing customer incident logs by 63%.
Software Engineer
3 Years 9 Months- Tech-Stack: OpenNLP, Java, Spring MVC, Postgres, Mickey(ORM), Redis, Kafka, Lyte(Ember-based-Framework), okhttp.
- Machine Learning Ingestion: Handled the native Machine Learning infrastructure integration loop end-to-end, managing clean API versioning transitions between structural legacy NLP layers and advanced decoupled ML services utilizing specialized webhook setups.
- Database Scale & Sharding: Optimized core relational storage execution query plans and implemented vertical database sharding configurations, dropping P99 engine execution latency lines from 5sec to 600ms.
- Distributed Architecture Refactoring: Collaborated on moving monolithic natural language systems into isolated microservices following separation of concerns guidelines, implementing standard REST APIs with restrictive rate-limiting layers aligned to PACELC high-consistency targets to cut sprint validation times by 60%.
- Administrative Operations Tools: Designed and built internal incident tracking nodes, support utility modules, and resource garbage collection tracking dashboards utilizing Spring MVC, Lyte, PostgreSQL, and Redis, owning the lifecycle loops up to live deployment telemetry.
Software Developer (Intern)
3 Months- Warehouse Automation Logic: Constructed transactional inventory and warehouse automation backend layouts using C#, LINQ, and SQL Server for multi-channel seller configurations, optimizing local POS operating margins.
- Notification Alerts: Built automated SMTP shipment confirmation and shipping-state data delivery notification loops.
Education
Bachelor of Engineering (B.E.) - Computer Science & Engineering
AISSE (High School)
Skills
Backend Ecosystem
Java
Spring Framework
Spring Boot
Spring MVC
Node.js
TypeScript
Express.js
Nest.js
Inversify
C#
LINQ
Distributed Systems & Messaging
Microservices Architecture
Monolith-to-Microservice Migrations
Kafka
BullMQ
Event-Driven Services
Async I/O
Webhook Engineering
Data Architecture & Scaling
PostgreSQL
MySQL
SQL Server
DynamoDB
Redis
Polyglot Persistence
Database Sharding
Query Optimization
Production Database Migrations
Infrastructure & Cloud
Cloud-Native Architecture
Amazon Web Services (AWS)
Containerized Deployments
Docker
Continuous Integration/Continuous Deployment (CI/CD)
Domain Expertise
Payment Platforms
Billing Systems Architecture
Transaction Protocols
PCI-Adjacent Credentials Management
Natural Language Processing (NLP Engines
OpenNLP)
Methodology & Tools
System Design (HLD/LLD)
PACELC Trade-Off Analysis
Agile Methodologies
Sprints
Technical Documentation
JIRA
GIT
Accomplishments
- Infrastructure Engineering: Scaled P99 latencies down from ~2sec to a highly predictable 300ms baseline by leading complex monolith-to-microservice structural migrations.
- System Integrity Optimization: Designed high-availability transactional ledger architectures maintaining strict data consistency configurations under explicit distributed system (PACELC) trade-offs.
- Payment Automation Delivery: Developed protocol-level transaction routing pipelines and file-based data tracking frameworks to optimize checkout loops and reduce payment network scheme fees.
Timeline
Independent Software Consultant & Engineer
Freelance
11.2025 - Current
Senior Software Engineer
SurveySparrow
11.2023 - 10.2025
Software Engineer 2
PayPal
05.2022 - 09.2023
Software Engineer
Zoho Corporation
08.2018 - 05.2022
Software Developer (Intern)
ValleyPoint Technologies
05.2018 - 08.2018
Jeppiaar Engineering College
Bachelor of Engineering (B.E.) from Computer Science & Engineering
St. John's Senior Secondary School
AISSE (High School)