Sagar Jain

CTO

London, England, United Kingdom11 yrs 6 mos experience
Highly Stable

Key Highlights

  • Expert in building scalable fintech products.
  • Proven track record in cybersecurity with major bug reports.
  • Strong leadership and mentoring experience in engineering.
Stackforce AI infers this person is a Fintech and SaaS expert with strong backend engineering and cybersecurity skills.

Contact

Skills

Core Skills

BackendSystems DesignCybersecurityProduct ManagementApi DevelopmentCoaching & MentoringSolution Architecture

Other Skills

AWS LambdaAmazon CloudFrontAmazon DynamoDBAmazon EC2Amazon KindleAmazon S3Amazon SQSAmazon Web Services (AWS)Cloud ComputingComputer ScienceCore JavaDatabasesDjangoEC2Engineering Management

About

Experienced Software development engineer (mostly Backend) with understanding of Data Structures and Algorithms. Experienced in designing and developing large scale distributed systems with Java, Spring, Cloud technologies (Google cloud platform or Amazon web services). I love to solve problems related to programming and exploring open sourced RESTful APIs. Apart from work, i have a good understanding of cybersecurity and have reported major bugs in Uber, Google, Ola, LinkedIn, Amazon.

Experience

Jpmorgan chase & co.

Vice President of Software Engineering

Mar 2024Present · 2 yrs · London Area, United Kingdom · Hybrid

  • I’m currently focused on building scalable fintech products that power both B2B and B2C payments ecosystems. My work involves driving core payment systems — from payment orchestration to SEPA integrations — ensuring reliability, performance, and compliance at scale.
  • 🚀 What I Do
  • Lead the design and development of next-gen payment services.
  • Deliver result-oriented solutions with a focus on quality, scalability, and business impact.
  • Mentor team members, fostering a culture of ownership, accountability, and innovation.
  • Collaborate across functions to align technology with strategic product goals.
  • 🧠 Tech Stack & Expertise
  • Languages & Frameworks: Java, Kotlin, Spring, GraphQL, REST
  • Domain: Payment Orchestration, SEPA Payments, Fintech Platforms
  • Approach: Data-driven decision-making, system reliability, and performance optimisation
JavaKotlinSpringGraphQLRESTBackend+1

Intercom

Product Engineering

Sep 2022Jun 2024 · 1 yr 9 mos · Greater London, England, United Kingdom · Hybrid

  • Part of Growth and AI Group at Intercom.
  • Working on increasing net new paid customers at Intercom.
  • Integration with OpenAI GPT-4 APIs within Intercom Messenger.
  • Cardless trials at Intercom
  • Increasing trial to paid conversion as part of Intercom Growth vision.
Systems DesignEnterprise ArchitectureBackendAPI DevelopmentSoftware DevelopmentProduct Management+2

Scaler

Engineering Mentor

Nov 2020Jun 2024 · 3 yrs 7 mos · Bengaluru, Karnataka, India

  • Mentoring Engineers at Scaler.
  • Problem-solving and Mock interviews
  • Interview preparation
Spring BootProblem SolvingCoaching & Mentoring

Paypal

2 roles

Staff Software Engineer

Promoted

Sep 2020Aug 2022 · 1 yr 11 mos

  • Worked with PayPal Simility strategic partnership.
  • Integrated Simility solutions into PayPal Core payment systems.
  • Understand business and technical architecture of Simility systems and PayPal Systems
  • I am working on Building a next generation Data Pipeline for Data Scientists and Data Developers. The pipeline allows its users to manage source code, run and deploy in stage and promote their code to Production.
  • The microservice architecture of pipeline is developed with Java, Spring, Hibernate JPA, mySQL and few other microservices written in Python, Django Framework. The services extensively leverages Google Cloud Platform products like Google Big Query, Dataproc for Spark deployments, Google cloud storage, Google PubSub.
Engineering ManagementSolution Architecture

Senior Software Engineer

Jul 2018Sep 2020 · 2 yrs 2 mos

  • I am a part of Core Data Platform Engineering team. My team design and build products for a typical software development teams to provide them smooth deployments, build, execution and integration pipelines.
  • I am currently working on Data Application Lifecycle Management which provides pipelines for data product and objects. The product involve validations, governance, auditing, approval, ticketing and push to the production environment

Amazon

Software Engineer

Oct 2016Jul 2018 · 1 yr 9 mos · Greater Chennai Area

  • I worked on the Kindle Personal Document Service which lets millions of Kindle Customer to send their Personal documents to their Kindle Devices (iOS, Android, Kindle, Fire Tablets). The service receives the document sent from the customer and converts it to Kindle Format.
  • All documents sent using KPDS are synced in Real-time, highlights and the last page read.
  • I worked on Documents app(Android) for Fire Tablets. I worked on upgrading it to Android Nougat and code refactoring. The authentication module for the app was fully refactored to use the latest class HttpURLConnection. The newly introduced permission model helped to achieve secure and better user experience, where users can now directly manage app permissions at runtime.

Hewlett packard enterprise

2 roles

Research Development Software Developer

Oct 2015Oct 2016 · 1 yr

  • The core responsibilities include enhancing and revamping the HPE telecom solutions to Products. Solutions include Customer Billing, Service Provisioning and De-Provisioning, Charging, User Data, Notifications, Messaging. We worked towards developing and revamping them in order to make them generic and scalable. HPE R&D focussed on building products over solutions for the telecom giants in South America, North America, Mexico, Puerto Rico, Columbia
  • HP Intelligent Messaging
  • HP IM is a product for the telecom clients for sending promotions to the customer when they run out of Data or when the customer is traveling to a Roaming location.
  • Worked on some modules of HP IM which includes messaging and Notifications to the customer. I used SMPP and SMTP for Email and XMPP for messaging.

Software Development Engineer

Aug 2014Sep 2015 · 1 yr 1 mo

  • Worked on HPSM (Hewlett Packard Subscription Manager) which is a full-fledged solution for telecom clients in order to simplify and achieve various operations involved in process of Subscription. HPSM is a mediation solution.
  • Core responsibilities includes:
  • 1. Development
  • 2. Code enhancement and refactoring.
  • 3. Ownership of Modules.
  • 4. Version Control.
  • 5. Deployment and Patch builds.
  • Worked and different modules which involved protocol conversion, Synchronized and Asynchronized API calls, Database handling, SMPP and SMTP, Product Release, Product Delivery.

Hackerone

Cyber Security Researcher & Bug Bounty Hunter

Jan 2015Present · 11 yrs 2 mos · Bengaluru, Karnataka, India · Remote

  • Found and Reported bugs in Uber, Google, Amazon, Cred, OneCode, EarlySalary, Nokia, Ola, GitHub
Information SecurityCybersecurity

Sisdon infosolutions pvt ltd

Software Engineer Intern

Dec 2013Jul 2014 · 7 mos · Mumbai Metropolitan Region

  • Worked on a notifications backend web service for a client of SISDON. The service was written in Java and front end in javascript. The service provided various channels of Notification aka In-app notification, Email, and SMS.

Education

Dr. A.P.J. Abdul Kalam Technical University

Bachelor's degree — Computer Science Engineering

Jan 2010Jan 2014

Central Board of Secondary Education

High School — Science

Jan 2008Jan 2010

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