Sagar Wadhwa

Software Engineer

Bengaluru, Karnataka, India11 yrs 2 mos experience
Highly StableAI Enabled

Key Highlights

  • Designed AI-driven tools reducing processing time significantly.
  • Architected large-scale systems saving millions annually.
  • Led engineering initiatives enhancing security and performance.
Stackforce AI infers this person is a Backend-focused engineer with expertise in SaaS and E-commerce architectures.

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Skills

Core Skills

BackendDistributed SystemsMicroservicesAiEvent Based ArchitectureStream ProcessingSystem ArchitectureSecurity

Other Skills

PythonKafkaAmazon DynamodbFastAPIRESTful WebServicesRedisCeleryGenAILarge Language Models (LLM)FlaskPostgreSQLAWSScalabilitySystem DevelopmentPython (Programming Language)

About

Fairmatic empowers businesses with innovative AI solutions, and as a Lead Software Engineer nearly three years at the company, my contributions have focused on leveraging expertise in backend development, core platform capabilities, and scalable systems. Collaborating with cross-functional teams, we enable seamless system integrations and deliver secure, efficient, and robust solutions tailored to business needs. Previous roles at CaaStle refined skills in cloud-based architecture and advanced backend systems, further enhancing technical problem-solving capabilities. Passionate about merging technology with purpose, the mission is to create impactful, AI-driven tools that simplify processes and unlock growth opportunities for organizations.

Experience

11 yrs 2 mos
Total Experience
3 yrs 7 mos
Average Tenure
5 mos
Current Experience

Venmo

Staff Software Engineer

Dec 2025Present · 5 mos · Bengaluru, Karnataka, India · Hybrid

PythonKafkaAmazon DynamodbDistributed SystemsFastAPIBackend

Autofleet

Lead Software Engineer

Sep 2025Dec 2025 · 3 mos

Fairmatic

2 roles

Lead Software Engineer

Apr 2025Aug 2025 · 4 mos

  • Designed and delivered GenAI-powered, unstructured document processing platform, applying AI to production-ready applications and services to be used across the organisation, reducing manual processing time by 40 mins per document and overall application turnaround time from 10 days to under 4.
  • Built and deployed secure, high-availability microservices (10,000+ RPM, 99.95% uptime) with FastAPI and Flask in Python, PostgreSQL DB, deployed in AWS cloud as containerised services.
  • Developed event processing pipelines with Redis, Celery, Kafka for various real-time & async workloads, implementing queuing and messaging systems.
  • Implemented mileage forecasting using Prophet for proactive customer issue detection and resolution.
  • Led engineering process standardization initiatives like async task pooling, bootstrap starter project, coverage, code-review into git commit pipeline, on-call handover and runbook creation.
  • Collaborated with product, design, and business stakeholders to align technical delivery with end user needs, taking complete ownership of the product from requirements to deployment to monitoring.
  • Set up organisation standards for tracing/logging and request metrics to track applications’ performance and help debug issues.
PythonRESTful WebServicesKafkaRedisStream ProcessingEvent Based Architecture+6

Senior Software Engineer

Jan 2023Apr 2025 · 2 yrs 3 mos

  • Spearheaded the implementation of IAM and access control frameworks using Supertokens, enhancing security across services.
  • Developed a robust data versioning framework to ensure resilience against structural changes, improving system reliability.
  • Optimized data modeling for various entities, leading to a significant boost in database performance through refined queries and inserts.
System ArchitectureScalabilitySystem DevelopmentPython (Programming Language)Distributed SystemsWritten Communication+2

Caastle

3 roles

Principal Software Engineer

Promoted

Jan 2021Jan 2023 · 2 yrs

  • Architected a large-scale distributed e-commerce hosting system on AWS & Kubernetes, replacing Shopify and saving $1.2M annually.
  • Developed an internal framework to mitigate OWASP Top 10 vulnerabilities, enhancing security protocols.
  • Led architecture reviews, collaborating with cross-functional teams on mission-critical projects to ensure alignment and efficiency.
  • Coached and mentored juniors and peers for secure development practices
System ArchitectureScalabilitySystem DevelopmentGeneral Data Protection Regulation (GDPR)Distributed SystemsWritten Communication+9

Senior Software Engineer

Promoted

Jul 2018Jan 2021 · 2 yrs 6 mos

  • Built container-based testing environments to support CI/CD pipelines and ensure high availability & reliability of deployments.
System ArchitectureScalabilitySystem DevelopmentGeneral Data Protection Regulation (GDPR)Distributed SystemsWritten Communication+5

Software Engineer

Feb 2017Jun 2018 · 1 yr 4 mos

  • Modernized test frameworks to NodeJS-based integration without rewrite, saving months of engineering effort.
System ArchitectureScalabilitySystem DevelopmentGeneral Data Protection Regulation (GDPR)Distributed SystemsWritten Communication+5

Publicis sapient

Associate L2

Oct 2014Feb 2017 · 2 yrs 4 mos

  • Standardized automation practices by creating an org-wide Selenium + TestNG framework.
  • Automated functional tests for a mission-critical Commodity Trading Application, reducing manual QA cycles.
Written Communication

Unitech

Intern

Jun 2013Aug 2013 · 2 mos

Education

Guru Tegh Bahadur Institute of Technology

Bachelor of Technology (B.Tech.) — Computer Science and Engineering

Jan 2010Jan 2014

Mata Jai Kaur Public School

10 + 2 — Science (Non Medical with Computers)

Jan 1996Jan 2010

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