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Freelance engineering partner

I help founders and teams ship confident, resilient software that feels impeccably crafted.

Based in Liverpool, I design, build, and scale web and mobile products with a focus on performance, thoughtful UX, and sustainable engineering practices.

4+ years

Product engineering experience

40+ launches

Web & mobile products shipped

3 continents

Teams partnered with

Core stack

ReactReact NativeNext.jsTypeScriptNode.jsPythonAWSDocker

What clients notice

  • • Pragmatic delivery with enterprise-grade tooling.
  • • UI polish that reflects your brand from day one.
  • • Clear communication, async-friendly collaboration.

Capability

Scale ideas into production-grade products without sacrificing craft.

I work end-to-end across discovery, product design, and engineering. Whether you need a new build or help levelling up an existing platform, we create a roadmap, move fast, and keep quality measurable.

Beautiful Interfaces

Crafting pixel‑perfect user experiences users trust and enjoy.

Cross-Platform Apps

Building native‑quality mobile apps that work seamlessly across iOS and Android.

High Performance

Optimizing applications for speed, efficiency, and scalability.

Custom Solutions

Developing tailored software that fits your business needs.

Cloud Infrastructure

Setting up robust, scalable cloud environments for growth.

Rapid Development

Delivering high‑quality products quickly using modern practices.

Selected Work

Recent projects where technical expertise meets business impact.

01

Healthcare Platform Development

Built Medblocks, a comprehensive healthcare platform that enables developers to create modern healthcare applications using vendor-neutral APIs. The platform serves as an operating system for healthcare apps, supporting openEHR standards and providing seamless data migration tools. Created both the core platform and Medblocks UI, a web components library that converts openEHR templates into reusable form components.

Impact

Reduced integration time from months to weeks for healthcare organizations

Stack

ReactNext.jsTypeScriptWeb Components
02

E-commerce Solutions

Developed complete e-commerce platforms with modern architecture featuring real-time inventory management, secure payment processing, and comprehensive admin dashboards. Built scalable solutions that handle high traffic volumes during peak sales periods while maintaining optimal performance and user experience.

Impact

Increased conversion rates by 35% through optimized user flows

Stack

ReactNode.jsMongoDBStripe API
03

Data Analytics & Business Intelligence

Created real-time data visualization platforms with interactive dashboards, custom reporting systems, and advanced filtering capabilities. Built unified data pipelines that provide executive teams with live business insights, enabling data-driven decision making across organizations.

Impact

Enabled 25% revenue increase through actionable business insights

Stack

Next.jsD3.jsPostgreSQLPython
04

Mobile Application Development

Developed cross-platform mobile applications with focus on user experience and performance. Built banking applications with biometric authentication, real-time transaction processing, and comprehensive financial management features that meet stringent security requirements.

Impact

Delivered secure, scalable mobile solutions for financial services

Stack

React NativeTypeScriptAWSFirebase

Services

Engagement formats designed to meet teams where they are.

From product discovery to growth infrastructure, each engagement pairs senior hands-on execution with clear operating rhythms and measurable outcomes.

Product Strategy & Discovery

Align product direction with market insights, shape research-backed roadmaps, and validate essential hypotheses before writing a single line of code.

  • User Research & Personas
  • Technical Feasibility Audit
  • MVP Definition & Roadmap

Engineering & Architecture

Build resilient, scalable applications with modern stacks. I focus on clean code, automated testing, and cloud-native infrastructure to ensure long-term velocity.

  • React, Next.js, React Native
  • Node.js & Cloud Infrastructure
  • API Design & Database Modeling

Growth & Lifecycle

Instrument analytics, craft activation funnels, and use experimentation to grow adoption. Implement performance budgets and meaningful KPIs baked into the product.

  • Mixpanel, GA4, Amplitude integrations
  • Lifecycle automations with messaging flows
  • Experimentation pipelines, Meta Ads, LinkedIn Ads, Google Ads

Unified Ecosystem

Bring your entire stack together.

Process

A calm, outcome-led way to build software.

Engagements are structured, transparent, and async-friendly. We align on success metrics early, then iterate with a shared roadmap and frequent demos so you can see progress without micromanaging.

01

Discover

Rapid workshops to map goals, users, and technical constraints before writing a single line of code.

02

Design & Build

Ship user-facing value every week with modern tooling, clean architecture, and measurable quality gates.

03

Launch & Evolve

Guide releases, automate operations, and iterate with data so your product keeps compounding value.

Testimonials

Trusted by product leaders who value craft.

I partner with founders and engineering teams to solve complex technical challenges without compromising on user experience.

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5.0 rating from 40+ clients

"Karthik delivered our mobile app ahead of schedule. The quality was exceptional and the user experience is exactly what we envisioned."

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Elena Rodriguez

VP of Product at FinFlow

"Working with Karthik transformed our idea into a production-ready platform. His cross-platform expertise saved us months of development time."

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David Park

Founder, HealthSync

"The cloud infrastructure Karthik built for us has been rock-solid. Zero downtime and scales beautifully with our growing user base."

J

James Wilson

Engineering Lead at CloudScale

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Let’s design the next chapter of your product.

Share the roadmap, the constraints, or even the chaos you’re working within. I’ll help uncover the best path forward and start shipping.

Karthik Nishanth

Product-minded software engineer crafting resilient experiences across web and mobile. I partner with founders and teams to move fast without compromising on craft.

Stay in the loop

Notes on product delivery, engineering systems, and the lessons learned while shipping with founders and teams.

© 2025 Karthik Nishanth. Crafted with care in Liverpool.