Jeevan Thomas Koshy
Verified Expert in Engineering
Software Developer
Bengaluru, Karnataka, India
Toptal member since July 20, 2021
Jeevan is an experienced software engineer with 8+ years of experience building and operating large-scale systems used by millions. He thrives in architecting scalable services and infrastructure, and has experience designing AI data pipelines. He has delivered impactful solutions across creative tech, consulting, ride-sharing, fundraising, and edtech. Jeevan's technical versatility and entrepreneurial mindset enable him to tackle complex challenges and drive meaningful outcomes on any project.
Portfolio
Experience
- TypeScript - 8 years
- PostgreSQL - 8 years
- Amazon DynamoDB - 8 years
- Back-end - 8 years
- Node.js - 7 years
- Technical Leadership - 5 years
- Microservices - 5 years
- Retrieval-augmented Generation (RAG) - 1 year
Preferred Environment
Node.js, TypeScript, Amazon Web Services (AWS), PostgreSQL, Back-end, Docker, React, Amazon Simple Queue Service (SQS), Amazon RDS, RAG Pipelines
The most amazing...
...thing I've done was lead the tech for a large-scale fundraising platform that has processed over $500 million in donations.
Work Experience
Lead Software Engineer
Vertical Raise
- Built multiple products and analytical dashboards that are actively in production and used widely within the company, which has helped the company grow to its current scale.
- Reported directly to the CEO and CTO, and made core software decisions. Led a team of four, overseeing and guiding the entire software development process.
- Designed and built the entire back end, including infrastructure for all the internal tools within the company, while dealing with a ton of live data. These tools are used by 400+ sales reps across the company daily.
Senior Software Engineer
Zerohash
- Reduced the 99th percentile API latency by order of magnitude for numerous API endpoints by introducing appropriate composite indexes and optimizing database queries.
- Worked with other teams across the company and implemented multiple customer-facing APIs, Slack integrations, and UI functionalities.
- Helped address and resolve critical customer issues and bug fixes and acted as one of the primary points of contact for the Node.js microservices in the company.
- Played a crucial role in helping the company pass a load test carried out by a large potential customer by quickly scaling various microservices and optimizing multiple endpoints.
- Contributed to getting breakdown services live by leading the effort for double write and reads during the transition period.
- Helped stabilize the back-end codebase by adding unit AND integration tests for numerous endpoints.
Senior Software Engineer
Percent
- Implemented agent verification APIs required by the client and helped land a very large customer.
- Completed a 12-week contract position with Toptal.
- Helped stabilize the back-end codebase by adding unit and integration tests for numerous endpoints.
Co-founder | Software Architect
Hire the Author
- Developed a web application that allows creators to monetize via offering 1:1 calls and chat subscriptions to their audience.
- Designed and implemented the entire back-end infrastructure on AWS which is composed of 14 microservices.
- Created a robust chat service on a serverless infrastructure with AWS and integrated multiple third-party services like Stripe Connect, Google Calendar, and more.
Software Engineer
Bounce Share
- Proposed and implemented "Scan and Book Bike," which allows users to scan the number plate of a nearby bike to book it. This feature was a major success and accounts for more than 10% of business revenue.
- Worked on challenging engineering problems to scale Bounce to a level of 100,000 bookings per day with more than a million daily active users.
- Built and deployed numerous critical features to the business and formed the core product at Bounce.
- Managed a team of four interns that contributed to running deep learning models for scooter detection on mobile.
- Helped stabilize the back-end codebase by adding unit AND integration tests for numerous endpoints.
Application Engineer
Oracle
- Worked on the service requests module for Oracle Fusion Applications.
- Created the Oracle Notepad application proof of concept (POC) to be integrated across multiple applications; it's similar to Google Keep.
- Built a feed stream back end (POC) to handle activity streams for service requests.
- Implemented a complete MockServer implementation of the existing back end for functional testing.
Computer Vision Developer
Detect Technologies
- Developed intelligent algorithms for the project, NOCTUA, used in automated and intelligent inspection technologies for major process industries targeting asset and productivity management.
- Implemented a robust stitching algorithm to process the raw data acquired to give a precise stitched-together image.
- Worked on 3D image reconstruction using SFM and implemented a segmentation based on depth from a single video feed using the concepts of SFM.
Experience
Chatwise
https://chatwise.so/Haulistic
https://haulistic.io/Haulistic has three live customers as of now, and these customers drive sales of 10 lac+rupees per month via the platform.
Hire the Author
https://hiretheauthor.com/Mingler
My work included building the entire back end on serverless technologies on AWS and designing and building the back-end services from scratch.
Scan and Book
Education
Bachelor's Degree in Mechanical Engineering
Indian Institute of Technology, Madras - Chennai, India
Certifications
AWS Certified Developer Associate
AWS
Skills
Libraries/APIs
Node.js, Stripe, REST APIs, React, Stripe Connect, Pandas, TensorFlow, OpenCV, NumPy, AWS Amplify, Slack API, OpenAI API, Instagram API, WhatsApp API
Tools
Amazon Cognito, Amazon Simple Queue Service (SQS), Git, Amazon CloudFront CDN, AWS Fargate, Amazon Virtual Private Cloud (VPC), GitLab, GitLab CI/CD
Languages
TypeScript, JavaScript, Python, HTML, CSS, HTML5, GraphQL, SQL, Go, Java
Frameworks
Serverless Framework, Angular, Express.js, NestJS, Next.js, Flutter, Jest, Ruby on Rails (RoR), Django, gRPC
Paradigms
Serverless Architecture, Microservices, Event-driven Architecture, API Architecture, Agile, DevOps, Automated Testing
Platforms
AWS Lambda, Docker, Amazon Web Services (AWS), Kubernetes, Amazon EC2, Firebase, Google Cloud Platform (GCP), Mapbox, Droplets
Storage
Amazon DynamoDB, NoSQL, PostgreSQL, MySQL, Databases, Database Architecture, Amazon S3 (AWS S3), Redis, MongoDB, ClickHouse
Other
Software Development, Amazon API Gateway, Serverless, Back-end, Web Development, Cloud, Technical Leadership, Containers, APIs, Startups, CI/CD Pipelines, Solution Architecture, Software Architecture, Real-time Data, Retrieval-augmented Generation (RAG), Full-stack, EventBus, Architecture, SaaS, Distributed Systems, Machine Learning, Amazon RDS, Apollo Server, CTO, Learning Management Systems (LMS), PWA, AWS DevOps, Artificial Intelligence (AI), Agentic RAG Systems, Computer Vision, Amazon Route 53, ECS, Subscriptions, AWS App Runner, AWS ECS Fargate, Load Balancers, Razorpay, Vector Databases, RAG Pipelines, Data-centric AI
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