Data Visualisation Consultant specialising in d3.js with a passion for bringing data to life with this fantastic tool.
* React, Angular, Typescript, web apps.
* Available at any stage in the project - from raw data through to fully developed Figma design.
* UK based
* 100% commitment and 100% quality
* keeping Upwork customers happy since 2016
D3.js
Interactive Data Visualization
Data Visualization
Storytelling
JavaScript
HTML
CSS
React
TypeScript
Jest
Data Analytics
Angular
Web Development
Business Intelligence
Data Modeling
Adam M.
Manchester, United Kingdom
$200/hr
5.0
85 jobs
I build production LLM systems for industries where a wrong answer costs real money — insurance, finance, law, property. Expert-Vetted (the badge Upwork reserves for its top 1%), 100% Job Success across 70+ projects and six years.
Not prototypes. Not proof-of-concepts. Production systems that non-technical people depend on every day.
WHAT I DO
Two specialisms:
1. Document intelligence — extracting structured, validated data from messy real-world documents (scanned PDFs, hand-filled forms, appraisals, payslips, 200-page policy manuals) at accuracy a business can put its name to.
2. Agentic LLM systems — multi-agent and multi-step workflows where AI makes real decisions: schema-validated, cross-checked by a second model, observable at every step, with a human in the right place by design.
The common thread: a manual process that took days becomes an automated pipeline that takes minutes — with the evidence to prove it didn't get worse.
THE RECORD
• Lead engineer on a production AI underwriting platform, sold through a policy-software vendor serving 18 insurance carriers: 99.55% precision on discount and surcharge rules, 96.14% overall — policy review went from days to 3–5 minutes
• 12M+ UK planning documents (120M+ pages) extracted and embedded in under 48 hours, at 65–75% below the GPT-4 baseline cost
• Payslip extraction for a UK mortgage broker: 52% fewer processing errors, 80% less manual review, 15% faster mortgage approvals
• 700+ UK Local Plans summarised weekly, fully automated, at 75% lower LLM cost through context caching and batch APIs
• A consumer-fintech assistant where every financial figure is computed by deterministic code, not the model — zero made-up numbers by construction
• A private-equity deal-screening agent that completes the firm's own investment scorecard end-to-end, backtested against realised fund returns
The 99% figures are maintained properties, not launch statistics: golden-sample regression suites replay real production cases on every change.
HOW I WORK
I default to the simplest implementation that works and iterate with evidence. Strong prompting before fine-tuning; an API call before custom infrastructure; a benchmark before an architecture decision.
Non-negotiables on every pipeline:
• Pydantic schema enforcement — if it doesn't validate, it doesn't pass
• Dual-model verification for high-stakes data
• Full observability (LangSmith / Langfuse) — nothing is a black box
• A gold-standard test set built early, regression-tested on every change
Communication: daily written async updates and a weekly Loom walkthrough.
WHAT CLIENTS SAY
"His Loom updates were the highlight of my week! He's great at communicating complex AI concepts to non-technical people and keeps you in the loop every step of the way." — Chris Barnes, Co-Founder, Gains App
"Adam is an absolute powerhouse of an LLM Engineer. He has first class communication skills which make working with him an absolute pleasure." — Sammie Ellard-King, Founder, Gains App
"A great balance of personality, professionalism and a deep knowledge of the AI space. He's a strategic thinker who considers the bigger picture." — Tom Story, PlannrAI
TECHNICAL STACK
• Orchestration: LangChain, LangGraph, LangSmith, Langfuse, Claude Code / agent skills, MCP
• Models: Claude, GPT, Gemini, Llama — via Bedrock, Vertex and direct APIs
• Infrastructure: AWS (ML Specialty certified), Docker, Kubernetes, Postgres + pgvector, FastAPI
• Core ML: Python, PyTorch, pandas, scikit-learn
• Validation: Pydantic, structured outputs, dual-LLM verification, LLM-as-judge test suites
CURRENTLY TAKING ON
• Enterprise document processing — financial, insurance, legal, mortgage, property
• Agentic workflows that have to be right, not just impressive
• LLM cost and accuracy work on existing systems
• Production pipeline architecture and technical leadership
Expert-Vetted · 100% Job Success · $400K+ earned · 5,750+ hours · 70+ projects
Python
Deep Learning
Keras
TensorFlow
XGBoost
PyTorch
Data Science Consultation
Machine Learning Model
Data Analysis
Machine Learning
Data Science
Neural Network
Artificial Intelligence
Data Modeling
Silvia G.
Edinburgh, United Kingdom
$25/hr
5.0
3 jobs
Need a smooth, bug-free product before launch?
I help start-ups, agencies and independent developers ship software that works, catching functional bugs, usability issues and cross-device inconsistencies early, so you avoid bad reviews and costly fixes later.
With 6+ years of QA experience across healthcare, legal tech, and the third sector, I bring structure and clarity to testing, and I communicate results in plain language your whole team can act on.
What I deliver:
• Functional, regression & exploratory testing (web + mobile)
• Cross-browser and cross-device testing (desktop Windows, iPad, mobile IOS)
• Clear bug reports — screenshots/video, expected vs actual, reproduction steps, severity priority
• Test case creation and QA documentation
• API & backend-response validation
• UX & usability feedback — I highlight what confuses real users, not just what breaks the code
• Requirements review & user story writing — if you need help defining what to build before testing it
• Spanish-English translation & proofreading — native Spanish speaker, fluent English, 20+ years in the UK.
Tools I use:
Chrome DevTools · BrowserStack · Postman · Trello · Notion · screen recording for video bug reports
Why work with me:
I combine attention to detail with clear, fast communication. I adapt to your workflow — whether you need a quick pre-launch bug hunt, a full test cycle, or a fresh pair of eyes on your UX. I work well with small teams and solo founders who need reliable output without the overhead.
Recent work includes a pre-pilot QA review for a non-profit platform, covering admin workflows, access control, end-user journeys, and UX friction — delivered as a prioritised bug report ready to hand straight to a developer.
Send me your build or URL and I’ll deliver a detailed QA report within 24–48 hours.
Software QA
Test Results & Analysis
Software Testing
Manual Testing
Regression Testing
Test Case Design
API Testing
Functional Testing
Cross Browser & Device Compatibility
Web Application
End-to-End Testing
Exploratory Testing
Test Plan
Bug Reports
Accessibility Testing
Sergei P.
London, United Kingdom
$100/hr
5.0
23 jobs
I have 10+ years of experience in building user-friendly and complex mobile applications. I have a solid knowledge of modern mobile app development using Kotlin, Jetpack Compose, Clean Architecture, high standards, and the latest trends in Android technology's stack.
Digging into business problems is a crucial part of my approach. I believe in architecting solutions that not only meet immediate technical needs but also align with the business goals of the organization.
Important highlights of my work:
• Most Mobile apps in my portfolio are built from scratch by me where I was a leading engineer.
• My response time is 1 hour maximum. I am always in touch.
• I know how to achieve a 99.9% crash-free rate.
• I was elevating the app rating from 2.8 to 4.6 stars out of 5 in Google Play.
• I am not an agency, I am doing 100% work in person.
• I provide efficient work and I am able to replace a small mobile team.
• My hourly rate is negotiable. Feel free to suggest your rate.
My technical skills:
• Programming languages: Kotlin, Java, SQL.
• Tools: Kotlin coroutines, RxJava, Retrofit, Apollo GraphQL, Dagger/Hilt, Room, Android architecture components.
• Frameworks: Android, Jetpack Compose, Firebase, Facebook, AdMob, Google Maps, Segment, Iterable, Apollo GraphQL.
• Architecture: Multi-modular, Clean, MVP, MVI, MVVM
• Environments: Android Studio, JIRA, Confluence, Youtrack, Git, Jenkins.
• Methodologies: Agile, Scrum, Kanban
• CI: Bitrise, Jenkins
• VCS: Github, Gitlab, Bitbucket
• Image loading and caching: Picasso, Glide, Coil.
• Unit tests: JUnit, Mockito, Robolectric.
• Other: Team leadership, Code review, Scrum master, Consultant, Mentor.
Let's collaborate to bring your mobile app ideas to life and make them stand out in the competitive app market.
Native App Development
Android
Kotlin
Java
Android App Development
Flutter
JetPack
Nayab N.
Bolton, United Kingdom
$20/hr
5.0
2 jobs
𝗣𝗵𝗗 𝗶𝗻 𝗣𝗿𝗼𝗴𝗿𝗲𝘀𝘀 | 𝗠𝗦𝗰 𝗶𝗻 𝗠𝗮𝗰𝗵𝗶𝗻𝗲 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 & 𝗙𝗶𝗻𝗮𝗻𝗰𝗲 | 𝗕𝗦 𝗶𝗻 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴
𝗨𝗞-𝗕𝗮𝘀𝗲𝗱 | 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝗱 𝗦𝗶𝗻𝗰𝗲 𝟮𝟬𝟭𝟴 | 𝗗𝗶𝗿𝗲𝗰𝘁 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝘁𝗼 𝗨𝗞, US, EU, and AUS 𝗦𝘁𝘂𝗱𝗲𝗻𝘁𝘀
Are you looking for a reliable, insightful, and technically skilled academic writer who understands both the science and the strategy behind academic excellence?
I’m Nayab Naveed — a researcher and academic consultant helping students since 2018 across machine learning, software engineering, computer science, essay writing, and business management.
With a proven track record of success delivering to direct clients in the UK, I now bring my academic writing and technical expertise to the Upwork platform, offering research-driven, plagiarism-free, and expertly formatted content tailored to university standards.
🔍 Academic & Technical Writing Services:
• Thesis and Dissertation Writing
• Literature Reviews (Traditional & Systematic)
• Research Papers and Proposals
• Case Studies and Business Reports
• Annotated Bibliographies
• Technical Writing (Python, R, ML Concepts)
• Editing, Proofreading & Formatting (APA 7th, Harvard, MLA, Chicago)
💼 Why Hire Me?
✔️ UK-Based & Actively Engaged with UK Academia
✔️ MS in Machine Learning with Finance Focus – Developed hybrid LSTM models for global stock market forecasting
✔️ Hands-on Tools: Python, R, Excel
✔️ Expert in Both Qualitative & Quantitative Research
✔️ Well-Versed in Referencing & Ethical Research Practices
✔️ 100% Manual, AI-Free Work with Turnitin-Ready Results
✔️ Excellent Communication & Fast Turnaround Times
✔️ Unlimited Revisions & Client Satisfaction Guaranteed
🛠️ Technical & Academic Tools I Use:
• Python, and R Studio
• Grammarly Premium, Turnitin Instructor Account
• EndNote, Zotero for Reference Management
• MS Word, LaTeX, Google Docs
📩 Looking to elevate your academic work with expert help?
Let’s connect! Message me or send an invite — I'm available and excited to support your academic success.
✅ First-time client? Ask for a discounted trial order to see my quality firsthand!
🔁 Open to long-term contracts with flexible budgets for regular academic support.
Business Writing
Academic Editing
Professional Tone
Academic Research
Finance & Accounting
Scientific & Technical Services
Research Documentation
Research Paper Writing
Research Papers
Craig S.
Dawlish, United Kingdom
$65/hr
5.0
22 jobs
My background is in ecological research: using advanced numerical methods to address ecological problems. I received my PhD in 1998, and have worked as a biostatistician and ecologist at a range of universities and government institutes in Australia and California. As a statistician, I have consulted widely for students, academics, and State and Federal research scientists and agencies. I have taught sampling and experimental design and statistical analysis courses in several countries using SAS, R, Statistica, Systat, and SPSS. I have over 50 peer-reviewed publications and am an experienced reviewer for a range of journals.
As a researcher, I will provide you with not only the end product, but also the reasoning behind the analytical decisions, and potential alternative approaches. Where necessary, I will write a formal description of results suitable for a report or journal publication. I am experienced in analyzing data from many different disciplines, so can work with anything from business data, through to questionnaires, to conventional sampling data.
I have a wide range of experience in analytical approaches including:
- Advanced sampling and experimental design;
- Generalized (including Generalized Additive Models) linear modeling;
- Generalized Linear Mixed-Effects Modeling;
- Multivariate ordination (unconstrained and constrained) and clustering;
- Spatial autocorrelation, Semivariance, and Geostatistical analyses;
- Classification and Regression trees (including bagging, boosting and random forest approaches);
- Non-linear and segmented regression;
- Overdispersed, zero-inflated and hurdle models;
- General randomization approaches
I primarily work in R and Python however I have also taught SAS, Statistica, Systat, and SPSS. I can generate RShiny interactive analytical pages, so you can maintain an online expert system of the analyses you need to use regularly.
Additionally, while not my main field of expertise I can construct databases using MariaDB/MySQL, write custom SQL queries as part of the package. All I need is the list of users and the CSV files of the data, and either a means of connecting to your server or I can send the SQL code for you to run yourself.
If you would like to use my services, please send me a message and we can arrange a call to discuss your project, what you would like from it - simply to make sure we are on the same page. I need to understand the ‘why’ of the project, so I can deliver the ‘how’ and the final result.
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