Savva Lambin
Product Engineer
Services
MVP Development
Product Engineering
Technical Consultation
Research Tools
From idea to a working product that can be tested with real users.
I build MVPs that are ready to validate real user needs, attract early adopters, and support iteration. I focus on shipping the right features fast and iterating based on real user feedback, rather than over-engineering.
Example work includes:
- Translating product ideas into a clear technical plan
- Building full-stack MVPs using React, TypeScript, and Python
- Rapid iteration based on user feedback
- Deploying and maintaining early production systems
Best for early-stage startups and solo founders who need to turn an idea into something real.
Freelance Pricing
- from £2,500 per 2-week sprint
- Most MVPs take 2–4 sprints depending on scope
- Smaller MVP builds from £3,000
How projects are scoped
- We start with a short discovery conversation to clarify the problem and desired outcome.
- A lightweight technical plan defines the initial MVP scope and priorities.
- Each sprint begins with a clear list of deliverables.
- Working software is delivered at the end of every sprint.
- Scope can evolve between sprints based on feedback and learning.
Product engineering support to design, build, and ship features quickly, with a focus on improving user and developer workflows.
I work as a flexible engineer who can pick up existing codebases, collaborate with designers and PMs, and deliver features that improve user experience and developer workflows.
Example work includes:
- Frontend development (React, Next.js, Vite)
- Internal tools, dashboards, and developer tooling
- Improving usability, performance, and maintainability
- Supporting product launches and high-impact features
Best for teams that need extra engineering capacity to ship features, improve existing systems, or move faster on product work.
Freelance Pricing
- from £2,500 per 2-week sprint
- Smaller engagements from £1,500
- Part-time retainers available
How engagements typically work
- I integrate with your existing workflow (GitHub, Linear, Jira, etc.).
- Work is planned in short delivery cycles or sprints.
- Priority tasks are agreed at the start of each cycle.
- Regular communication keeps progress transparent.
Practical working sessions to clarify product ideas, MVP scope, and technical approach.
Technical Consultation
Sometimes it’s helpful to spend time working through a product idea, MVP scope, or technical approach before committing to a full build.
These sessions are practical and focused on helping you make progress quickly.
- Intro call (15–20 minutes) free
A quick conversation to understand your project and see if I can help. - Working session (60–90 minutes) £120
We can go through your idea, outline an MVP, review technical options, or unblock specific problems.
You’ll leave with clearer next steps and a better sense of how to move forward.
Tools and systems to explore, organize, and work with complex data.
I design and build tools that make it easier to explore, organize, and work with complex datasets such as research papers, documents, or internal knowledge.
The focus is on turning large or messy data into something structured, searchable, and useful.
Example work includes:
- Data pipelines (Python) for collecting, cleaning, and structuring data
- Embedding, clustering, and metadata enrichment for discovery workflows
- Interactive web interfaces (React) for exploring relationships and trends
- CLI tools and internal dashboards for working with large datasets
Best for teams or founders working with complex or unstructured data who need better ways to explore and use it.
Freelance Pricing
- £2,500 per 2-week sprint (typical)
- Exploration or prototype work from £1,500
How projects are scoped
- We start by understanding the data, current workflow, and desired outcomes
- An initial approach is defined for structuring, processing, and exploring the data
- Work is delivered in stages so tools can evolve alongside your needs
- Early versions focus on usefulness and iteration rather than perfect systems
Most projects begin with a short introductory call where we discuss the problem you're trying to solve, the timeline, and whether the engagement is a good fit.
Work
Version Control & Prompt History for ChatGPT
OSS Research Tool for AI Safety
A powerful tool for customer data management
Product Engineer
Navigate your ChatGPT prompts with ease. A side panel that lists your conversation prompts and branches so you can quickly jump, copy, or edit instantly without scrolling.
Outcome
- Improved ChatGPT usability and workflow efficiency by enabling instant navigation and enhancing UX across branched conversations.
- Built with Preact, TypeScript, and Vite on the Manifest V3 framework. Implements prompt-history tracking, keyboard navigation, and branch detection via custom DOM observation and Chrome Extension APIs.
- Privacy-first approach- no personal information leaves the browser
Design and Development
Product Engineer
An open source web app which connects thousands of research papers on AI Safety to produce a knowledge graph.
MVP Design and Development for data pipeline & UI
- Python pipeline: Harvest data from arXiv API, SQLite storage, Specter2 embeddings, RegEx and centroid filtering stages, clustering, export to JSON as graph and summaries
- CLI options for embedding (CPU vs GPU), Clustering, Filtering & Export stages
- React Vite SPA using react-force-graph-2d package for graph visualisation
- Lazy load paper summaries per node
- Search through papers via keywords
- Improved graph visualisation using D3 and pixi.js
Front-End Developer
Website Development
- NextJS + Directus CMS App
- Extended and maintained a custom design system by adding reusable UI components
- Used static site generation (SSG) for fast-loading, SEO-optimized content.
- Translated Figma designs into pixel-perfect UI implementations
- Built responsive layouts to ensure optimal performance across devices
- Integrated a community forum utilising Firebase products (Authentication and Firestore)
App Development
- React + Ruby on Rails App
- Redesigned and updated UI components to enhance user experience and integrate new API data.
- Suggested flexible component variants during PRs, resulting in more reusable and maintainable UI patterns.
Skills
design
user experience
- Application Design
- Design Systems
- Rapid Prototyping and Ideation
design management
- Art Direction
front end
html & css
- Mobile-first
- Responsive design
- Performance Optimisation
- SCSS
- Radix UI
javascript
- Vanilla JavaScript
- TypeScript
- React, Redux & Toolkit
- NextJS
- 11ty
back end
Languages & Runtimes
- NodeJS
- Python
Frameworks & APIs
- Express
- FastAPI
Databases
- MongoDB
- SQL
- Redis
- Firestore
CMS & BaaS
- Firebase
- Directus
Deployment
- AWS
- DigitalOcean
- Docker
