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Ajay Singh
Verified Expert in Engineering
Back-end Developer
Bengaluru, Karnataka, India
Toptal member since July 21, 2020
Bio
Ajay is a back-end engineer with over ten years of product development experience—playing a pivotal role in developing several products from scratch. On any given project, you can find Ajay being actively involved in understanding requirements, roadmap planning, defining product architectures, working system design, and conducting code reviews to deliver scalable products that fit the client's needs. Ajay also is a technology enthusiast with a passion for problem-solving.
Portfolio
HipChip, Inc.
Ruby, JavaScript, CSS, HTML, Amazon Web Services (AWS), PostgreSQL...
VMware
RSpec, Amazon Web Services (AWS), Jenkins, Liquibase, Hibernate
Tibco
Haml
Experience
- Generative Artificial Intelligence (GenAI) - 5 years
- Amazon Web Services (AWS) - 4 years
- RSpec - 4 years
Work Experience
Ruby on Rails Developer
2020 - 2022
HipChip, Inc.
- Took responsibility for the payment gateway integration, cache enrichment, third-party integrations, and batch processing.
- Handled the bulk load, contributed to social integration, enhanced instrumentation, and tracked customer integration.
- Took charge of campaign management, increased customer retention, and enabled A/B testing.
- Oversaw the whole architecture of the product. Churned out a number of features in my stint with HipChip, which doubled the revenue.
Technologies: Ruby, JavaScript, CSS, HTML, Amazon Web Services (AWS), PostgreSQL, Amazon CloudFront CDN, Amazon S3 (AWS S3)
Senior Software Engineer
2015 - 2020
VMware
- Worked in multiple teams and started my journey with Socialcast, an enterprise social network: Vmware.com/in/products/socialcast.html.
- Built the collaboration framework for Socialcast, including comments, likes, and shares. Developed a one-to-one private messaging framework for Socialcast. Completed the successful data migration with 99.99% availability and 99.9999% durability.
- Conceptualized and built the application integration framework for Socialcast.
- Integrated with Socialcast several third-party service providers, like Confluence, Zoom, and Jira, to name a few.
- Conceptualized and built AVA, a virtual assistant backed by an NLP and an AI engine (IBM Watson), which provides various solutions to end users involving device registration, device order, filing a support ticket, and so on, to name a few.
- Worked with product managers to draw the outlines of features and understand requirements.
- Assisted in sprint planning and took ownership of the microservices end to end.
- Participated in code reviews and mentored fellow young engineers.
Technologies: RSpec, Amazon Web Services (AWS), Jenkins, Liquibase, Hibernate
Software Engineer
2012 - 2015
Tibco
- Worked on enterprise social network platform, Tibbr.
- Developed the application integration platform which allowed developers and customers to plug-in their applications in Tibbr.
- Integrated with third-party service providers like Google Hangouts, Evernote, and so on.
- Owned many features of the product from end to end and frequently interacted with clients for a better understanding of feature requirements.
Technologies: Haml
Software Engineer
2011 - 2012
Apollo HealthHiway
- Worked on a patient health record portal which enabled patients to access their health records online.
- Developed a service, which functioned as a cron job, that pulled in freshly uploaded records every hour as well as any updates—this enabled the system to work well despite 50,000-to-70,000 of health records being uploaded.
- Enabled a process that processed and normalize these records before uploading them on the portal. This was a critical piece, since losing out on a health record or uploading a piece of incorrect information, could be catastrophic.
- Built a service that ensured reliability, durability, and availability, Since the number of records kept on increasing with each passing day, we designed our service in such a way that at max it will function with 20% free storage.
Technologies: Ruby
Software Engineer
2010 - 2011
Lister Technologies
- Developed a student-teacher portal that facilitated coaches to schedule their classes. The service involved tackling race conditions, corner cases, avoid double scheduling, accessibility permissions, and so on.
- Built the functionality that disallowed double bookings. This involved tackling scenarios like a coach cannot book multiple classes at a given time, and neither a student can attend multiple at the same time.
- Rolled out a service, that gives estimates of the number of conference rooms required on a specific day based on the schedule of coaches.
- Developed the functionality that was used on a daily basis by both coaches and students. It was a driving feature of the product.
Technologies: Ruby, Salesforce
Experience
Tibbr
Tibbr is an enterprise social network. Analogically, it is similar to Facebook for work. I built the collaboration layer of Tibbr. I also participated in the development of the application integration framework for Tibbr, which allowed third parties to integrate with it. It was a wonderful experience.
Socialcast
I built the collaboration layer of Socialcast. I also conceptualized and developed the application integration platform for Socialcast through which end-users can easily access third-party services from within Socialcast.
Education
2006 - 2016
Bachelor's Degree in Computer Science
Vellore Institute of Technology - Vellore, Tamil Nadu, India
2011 - 2013
Master's Degree in Software Systems
BITS Pilani - Pilani, Rajasthan, India
Certifications
JANUARY 2020 - PRESENT
Amazon Web Services Solutions Architect Associate
Amazon Web Services (AWS)
OCTOBER 2019 - PRESENT
Oracle Certified Professional, Java SE 8 Programmer (OCPJP)
Oracle
MARCH 2019 - PRESENT
Oracle Certified Associate, Java SE 8 Programmer (OCAJP)
Oracle
Skills
Libraries/APIs
Facebook API, Liquibase
Tools
RSpec, Slack, Jenkins, Amazon CloudFront CDN
Languages
Java 8, Ruby, Haml, JavaScript, CSS, HTML
Paradigms
Functional Programming
Platforms
Amazon Web Services (AWS), MacOS, Salesforce
Frameworks
Hibernate
Storage
Memcached, PostgreSQL, Amazon S3 (AWS S3)
Other
Generative Artificial Intelligence (GenAI), Large Language Models (LLMs), Small Language Models (SLMs), Sprint Planning, Web Technologies, System Design
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