Software engineer · Product builder
Hi, I'm Randima Nayanajith

Building useful
things with
curiosity and care.

Software engineer · Product builder · Researcher

I design and build digital products that solve real problems, combine technology with human needs, and make life a little more interesting along the way.

§01 / FEATURED CASE STUDYMaplivo · ideas into maps →
Featured work Products · platforms · experiments
THE IDEAS, MADE TANGIBLE

Work shaped by curiosity,
built for people.

Explore the question behind each product, what was built, and where the work stands today.

02

NoteCheck

Smarter notes and reminders.

NotesRemindersProductivity

Everyday notes and reminders belong in one calm place. NoteCheck brings them together with a private vault.

MY FOCUSProduct concept · interface design
CURRENT STAGEInterface concept in development
In developmentRead case study
03

AiSight

Phishing detection for a safer web.

SecurityAIResearch

AiSight brings several signals together so a browser warning can give a more useful explanation.

MY FOCUSSecurity research · multi-agent systems
CURRENT STAGEMulti-signal research prototype
Research prototypeRead case study
RELEASED & IN USE

Shipped tools

Small, finished things you can install today.

  • PortSlayerCLI · Python · PyPI

    Find and free occupied development ports in one command.

    pip install portslayer
    View on PyPI
  • ScriptPilotVS Code extension

    Work with AI models from inside the editor without breaking flow.

    Source on GitHub
  • ReQuillWindows desktop app

    A focused Windows workspace for drafting with AI models.

    Source on GitHub
The blog Writing · ideas · research
§02 / THE FIELD NOTES

Thinking out loud.

Practical guides on AI agents, security, web development and the fixes developers search for most.

Browse all posts →
LATEST / AI ENGINEERING3 MIN READ

Context Engineering for AI Agents: A Practical Guide

Prompt engineering got you a good answer. Context engineering keeps an agent useful across fifty steps. Here is how to decide what earns a place in the window.

→
About

A software engineer and product builder who ships useful tools.

I hold an MSc in Cyber Security and Forensics and spend most days building: local-first product tools, developer utilities, and research into how browsers can explain the threats they catch.

See my experience →
EducationMSc, Cyber Security & Forensics
StackTypeScript · React · Python · FastAPI
Now buildingMaplivo, a local-first mind map
ResearchingExplainable phishing detection
Résumé Experience · research · education · tools
§04 / Experience

Where the work connects.

Software engineering, security research and independent products shape the way I work, from shipped developer tools to MSc research on a safer web.

SELECTED WORK PROFILE · PDFDownload PDF résumé ↗
RN / EXPERIENCE INDEXPRODUCTS · RESEARCH · RELEASES · EDUCATION
01 2026 / PRODUCT WORK

Making ideas useful.

Designing and building personal tools that put clarity and everyday use first.

MaplivoLocal-first mind mapping for organising connected ideas.
NoteCheckNotes, reminders and a private vault in one focused workspace.
02 2025–26 / RESEARCH

Building a safer web.

Exploring explainable, collaborative methods to detect phishing in the browser.

AiSightMulti-agent analysis of URLs, language, page content and screenshots.
Exploit-EdgeResearch into agent-based security testing and tool coordination.
03 ENGINEERING / RELEASES

Tools for people who build.

Turning technical problems into practical tools across the command line, editor and desktop.

PortSlayerA command-line tool for managing occupied development ports.
ScriptPilot & ReQuillA VS Code extension and a Windows workspace for working with AI models.
04 FOUNDATIONS / SKILLS

Curiosity with structure.

MSc in Cyber Security and Forensics, alongside hands-on software and product development.

BuildReact · TypeScript · Next.js · Python · FastAPI
ExploreAI agents · browser security · phishing detection
ShipDocker · cloud services · developer tools
Let's connect Ideas travel further together
The next chapter

Let’s make the next idea real.

Open to roles and conversations about software, products and security research. I usually reply within two working days.

FROM IDEA TO WHAT'S NEXT / 05Illustration of connected ideas taking flight