Live nowFounding Engineer2025 — Present
Tecton Scheduler
Multi-tenant SaaS — analytics, forecasting, and a per-tenant AI booking assistant on Acuity Scheduling.
Open to full-time · part-time · contract
I design systems that stay cheap, fast, and alive in production.
Ten years of shipping software people actually depend on — architecture through AWS deployment, and over the last two years, LLM features running on live products. I still write the code, own the incident, and explain the trade-off.
- Architecture
- Full-stack
- AI engineering
- Cloud
- Leadership
- Years in production
10+
Years in production
- Platforms shipped
5+
Platforms shipped
- Engineers led
4–6
Engineers led
- Test coverage
90%+
Test coverage
Rajendra Kumar
Architect · AI · Tech lead
- Based
- Kota, India
- Works
- Remote worldwide
- Phone
- +91 9950105566
- work@rajendracto.com
The short version
Three phases, one direction.
Interface work taught me what breaks. Systems work taught me why. AI work is where both matter at once.
- 2014 → 2019
Learned the craft
Front-end engineer shipping responsive interfaces across client projects — performance budgets, accessibility audits, and shared component libraries. The habits that make code survivable start here.
- 2019 → now
Owned the whole system
Full-stack and architecture: database design, backend systems, AWS deployment, CI/CD. Leading small teams, owning the incident, and answering for the trade-off rather than handing it off.
- 2024 → now
Put AI into production
LLM features on live products — booking assistants, job dispatch, internal automation. Not demos: async queues, strict contracts, cost and latency under control.
Professional summary
Senior Full Stack Engineer with 10+ years delivering production web applications across SaaS and enterprise platforms using Vue.js 3, Laravel, Next.js, and TypeScript. Over the past two years I have extended that into OpenAI and Claude API integration — building LLM-powered features such as automated workflow assignment and AI-assisted content generation for live products, including a founding-engineer role on a multi-tenant SaaS with an AI booking layer. Equally comfortable owning a full-stack build end-to-end or embedding AI capability into an existing platform, leading small engineering teams, running Agile delivery, and holding test coverage through TDD.
Career timeline
Roles, in reverse order.
Where I was, what I owned, and what actually changed because of it.
Current role
Senior Full Stack Developer
Jun 2019 — Present
Cracker Digital Media · Jaipur, India · Remote
Delivering production Vue.js and Laravel platforms end-to-end — architecture through AWS deployment — including OpenAI and Claude features on live products, and a founding-engineer role on a multi-tenant SaaS with an AI booking layer.
What I did
- Delivered 5+ client platforms end-to-end with Vue.js 3 and Laravel, from architecture through deployment, cutting average delivery cycle time by around 25%.
- Led a remote engineering team of 4–6 through Agile/Scrum sprints — sprint planning, code review, and delivery milestones in JIRA.
- Built an AI-powered job dispatch system for Markham Heating & Air Conditioning that automatically assigns incoming service requests to the nearest available technician, replacing manual scheduling.
- Designed AI-assisted commitment generation (OpenAI API) for a behaviour-change platform with 10K+ registered users, converting user-entered goals into structured action plans with automated milestone notifications.
- Traced and resolved a production incident affecting Australian users to a Safari cookie-scoping issue on the AU-region server, restoring full functionality with zero data loss.
- Built an internal client support workflow to log, prioritise, and resolve product queries, reducing ticket backlog and improving response times.
- Built Next.js SSR applications backed by Laravel REST APIs, improving page load speed and organic search visibility.
- Introduced TDD practices using Vitest and PHPUnit, sustaining 90%+ test coverage across active projects.
- Containerised environments with Docker and built GitHub Actions CI/CD pipelines, reducing manual steps in the release process.
- Managed production infrastructure on AWS (EC2, S3, CloudFront, RDS) across client platforms.
- Mentored 3–4 junior engineers through code reviews, design discussions, and structured 1:1s.
Major systems
- AI dispatch and geo-aware scheduling
- AI commitment engine and real-time chat
- Multi-tenant SaaS with an AI booking layer
- Next.js SSR apps on Laravel REST APIs
- AWS production infrastructure (EC2, S3, CloudFront, RDS)
- Docker environments and GitHub Actions CI/CD
- Team
- Led 4–6 engineers; mentored 3–4 junior engineers
- Stack
- Vue.js 3LaravelNext.jsTypeScriptOpenAIClaudeMySQLPostgreSQLRedisAWSDockerGitHub Actions
- Impact
- Around 25% faster delivery cycles, production AI on live products, a critical regional incident resolved with zero data loss, and 90%+ test coverage across active projects.
Front-End Engineer
Jan 2015 — Jun 2019
Kriscent Techno Hub Pvt. Ltd. · Kota, India
Built responsive, mobile-first UIs in Vue.js and React across 5+ client projects, with a focus on performance, accessibility, and conversion.
What I did
- Developed responsive, mobile-first UIs in Vue.js and React across 5+ client projects.
- Improved First Contentful Paint through code-splitting, lazy loading, and bundle optimisation.
- Standardised UI component libraries using Tailwind CSS, Bootstrap, and SASS across the engineering team.
- Reduced UI defects through regular Lighthouse audits and WCAG accessibility testing.
- Improved onboarding and checkout flows, contributing to a measurable increase in conversion rates.
Major systems
- Responsive client web applications
- Shared UI component libraries
- Onboarding and checkout flows
- Team
- Engineering team at Kriscent Techno Hub
- Stack
- Vue.jsReactTailwind CSSBootstrapSASS
- Impact
- Faster first paint, fewer UI defects, and measurable conversion gains on onboarding and checkout.
Education
Bachelor of Computer Applications
Kota University, India
2014
Selected engagements
Products I led inside those roles.
Delivered as a Senior Full Stack Developer at Cracker Digital Media — real, live systems built for the company's clients, not personal side projects or claimed IP.
Lead Product Engineer
Actionable HQ
AI commitment engine, real-time threaded chat, and WhatsApp Business API engagement for a behaviour-change SaaS with 10K+ users.
Lead Engineer
Markham Heating & Air Conditioning
AI job-dispatch agent with geo-aware slot allocation, plus online booking for furnace, AC, and maintenance calls.
Full Stack Engineer
DexaFit Denver
8-step guided booking flow for DEXA, VO2 Max, and RMR assessments with live pricing and a HIPAA-conscious flow.
Lead Engineer
Sovereignty Foundation
Publishing platform for an AI-governance standards body, plus an access-controlled legal document review system with a full audit trail.
Lead Engineer
Marina Connection
Two-sided marketplace for marina and boatyard equipment — seller listings, buyer discovery, and trade-specific SEO.
Lead Engineer
HDL Capital
Next.js SSR platform for an M&A advisory firm — Core Web Vitals, structured data, and technical SEO.
Core skills
What I work with day to day.
Depth across the stack, not a single specialty — which is what lets me own a system end to end.
01
Frontend
- Vue.js 3 (Composition API)
- Next.js
- React
- TypeScript
- Pinia
- Vuex
- Tailwind CSS
- SASS
02
Backend
- Laravel (PHP)
- RESTful API design
- Node.js
- MySQL
- PostgreSQL
- Redis
03
AI integration
- OpenAI API
- Claude API
- LLM feature development
- Prompt engineering
04
Testing & QA
- Vitest
- PHPUnit
- Test-driven development
05
DevOps & Cloud
- AWS (EC2, S3, CloudFront, RDS)
- Docker
- GitHub Actions CI/CD
- Nginx
- Linux
Credentials
Certifications and recognition.
Certifications
PHP Development Certification
Zend / PHP Institute
2015
Introduction to Prompt Engineering for Generative AI
LinkedIn Learning
2026
TypeScript for JavaScript Developers
LinkedIn Learning
2026
Awards
Employee of the Year
2017 & 2022
Cracker Digital Media
Achievement of the Year
2021
Cracker Digital Media
For delivering LLM-powered automation that reduced operational effort.
Evergreen Person of the Year
2018
Cracker Digital Media
For cross-team collaboration and consistent delivery.
Full profile on LinkedIn · Engineering notes · Hire me · Get in touch
Currently open to
Full-time · part-time · contract
Senior roles and defined engagements — remote, worldwide.
Available nowRemote · Worldwide
01
Full-Time
Senior IC or leadership — architecture, AI, and delivery.
- Software Architect
- Senior Software Engineer
- AI Engineer
- Technical Lead
- Engineering Lead
- CTO / Head of Engineering
02
Part-Time
A few hours a day of senior judgment without a full-time hire.
- Fractional CTO
- Technical Advisor
- Senior Engineer
- AI Engineer
- Architecture
03
Contract
A defined problem: audit, AI, performance, or rescue.
- AI implementation
- Architecture
- Code audits
- Legacy modernization
- Performance optimization
- Technical rescue
Next step
Tell me what's breaking.
You don't need a spec, a budget approved, or a tidy summary. Send the symptoms and what you've already tried. That's enough for me to give you a useful answer.
- 01
You send the symptoms
Two paragraphs is plenty. No NDA needed to describe a slow API.
- 02
I reply within 24 hours
With my honest read on what's likely happening — free, no call required.
- 03
We scope it, or we don't
If it's a fit you get a fixed price and a start date. If not, I'll say so.