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Christopher – Python, Typescript, OAuth, experts in Lemon.io

Christopher

From United States (UTC-4)

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Tech lead
Full-stack Web DeveloperSenior
18 years of commercial experience
AI
Biotech
Business intelligence
Credit and lending
Data analytics
Fintech
Govtech
Data monetization
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Christopher – Python, Typescript, OAuth

Christopher is an accomplished Data Architect, Senior Full-Stack Developer, and Tech Leader with nearly 20 years of engineering experience, specializing in fintech and AI-driven solutions. Throughout his career, he has successfully built software products from the ground up, raised funds, and turned around struggling teams, showcasing his ability to drive both technical and strategic success. Christopher thrives in fast-paced environments, having led diverse teams ranging from startups to large, established organizations. He brings hands-on experience in Python and TypeScript, along with a deep understanding of AI and machine learning applications. His leadership skills have been instrumental in transforming technology from a broken system into a powerful competitive advantage for multiple startups.

Main technologies
Python
5 years
Typescript
8 years
Additional skills
OAuth
React
Flask
PostgreSQL
.NET
AWS
Docker
Vector Databases
Playwright
OpenAI API
Terraform
Kubernetes
Django
Azure DevOps
Microsoft Azure
MySQL
Amazon S3
CI/CD
C#
Swift
MongoDB
Data Warehouse
Web Sockets
Snowflake
Ready to start
4-5 weeks' notice
Direct hire
Potentially possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

Lead Researcher and Author
Nov 2024 - Ongoing6 months
Project Overview

This project explores how to make agencies’ statistical data products more readily ingestible by AI technologies. It will produce an AI readiness assessment as a shared resource for any agency looking to test the machine understandability of its public data products and an AI readiness prototype tool to transform public data products into machine-understandable, AI-ready data.

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Responsibilities:
  • Developed a scorecard and rubric to evaluate AI readiness;
  • Authored reports assessing government data for AI readiness;
  • Presented findings and recommendations to high-ranking government officials;
  • Initiated the development of a tool to automate the evaluation of datasets for AI readiness;
  • Began work on a software solution to transform government datasets for improved AI compatibility.
Project Tech stack:
Python
BeautifulSoup
OpenAI API
Playwright
Docker
Docker Compose
Vector Databases
Architecture & Development Consultant
Jan 2023 - Ongoing2 years 4 months
Project Overview

A platform was developed to support the secure upload, storage, discovery, and analysis of experimental data generated in wet lab environments. The system was designed with a strong focus on maintaining data confidentiality and ensuring a verifiable chain-of-custody, which is critical for supporting regulatory approval processes such as those required by the FDA.

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Responsibilities:
  • Designed the system architecture for a lab-wide data management platform used to centralize and unify access to experimental data;
  • Eliminated data silos by enabling full data discoverability and searchability within a single system;
  • Implemented a Chinese Wall model to protect confidential partner data, allowing secure sample processing without revealing sensitive drug development outcomes;
  • Enabled data segregation within single lab instruments, significantly reducing equipment costs and turnaround times;
  • Reduced the cost and complexity of FDA audits through improved data accessibility and traceability;
  • Preserved negative experimental results, typically discarded, to support future machine learning model training.
Project Tech stack:
.NET Core
PostgreSQL
.NET
AWS
C#
Chief Technology Officer of owner-operated consultancy
Jul 2017 - Ongoing7 years 10 months
Project Overview

Worked on a range of consulting, engineering, and data architecture initiatives, delivering tailored technical solutions across diverse industries. Projects included designing scalable systems, implementing robust data pipelines, and providing strategic guidance to improve data infrastructure and software performance.

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Responsibilities:
  • Successfully turned around struggling teams, projects, and companies by identifying key issues and implementing effective solutions;
  • Quickly ramped up on new domains, architected systems, and delivered high-quality projects under tight timelines;
  • Implemented CI/CD and automated testing at a company that struggled with this for years;
  • Built a proprietary system to search through billions of records to recover lost assets from bankruptcy estates.
Project Tech stack:
Microsoft SQL Server
MySQL
Transact-SQL (T-SQL)
Azure Functions
Microsoft Azure
Azure DevOps
Algorithms and Data Structures
C#
MongoDB
Snowflake
TeamCity
Web Sockets
Swift
Redshift
Data Warehouse
Lead DevOps Engineer
Jun 2024 - Nov 20245 months
Project Overview

A private equity platform built on a quasi-crowdsourced model, designed to broaden access to investment opportunities beyond traditional PE structures. While still requiring accredited investor status, the model enables a wider pool of participants, offering greater flexibility and reach compared to conventional funds. The platform supports streamlined capital deployment and investor management across multiple deals.

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Responsibilities:
  • Built CI/CD pipeline and infrastructure;
  • Used Kubernetes and Terraform to set up a system that could auto-scale to handle tens of thousands of users per hour with a minimal budget;
  • Performed load testing and discovered bottlenecks;
  • Optimized various aspects of the application (frontend, database, application server) to handle the required load, multiple order-of-magnitude performance improvements;
  • Implemented zero-downtime deployments to ensure uninterrupted service availability during release cycles;
  • Created a system that allows for an arbitrary number of fully valid integration environments at negligible additional hosting cost.
Project Tech stack:
Python
Django
PostgreSQL
AWS
GitHub Actions
Terraform
Kubernetes
Nginx
Docker
Docker Compose
Amazon Cognito
Amazon EC2
Amazon RDS
Amazon S3
Amazon SNS
CI
CD
Development Consultant
Aug 2019 - Oct 20212 years 2 months
Project Overview

A platform designed for private equity and venture capital professionals to streamline the collection of financial reports from portfolio companies. It enabled users to view, analyze, and generate consolidated reports, improving visibility and decision-making across the investment portfolio.

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Responsibilities:
  • Recommended and implemented strategies that significantly increased project velocity, contributing to a successful exit;
  • Reworked business and software development processes to enhance efficiency and productivity;
  • Recruited a new CTO to strengthen the leadership team;
  • Implemented best practices that facilitated passing SOC and security audits;
  • Personally developed an Excel plugin to enhance data interaction and integration;
  • Built a public-facing API to expand external access to services;
  • Integrated Single Sign-On (SSO) with various providers and technologies to improve user authentication and security.
Project Tech stack:
Python
React
PostgreSQL
OAuth
Typescript
Flask
AWS
Chief Technology Officer
Aug 2015 - Jun 20171 year 9 months
Project Overview

A student payment platform designed to make career-focused education more accessible and affordable. The solution offers financing options tailored to individuals pursuing training programs with proven outcomes in increasing graduates’ earning potential. It supports a wide range of educational providers across industries such as technology, skilled trades, healthcare, culinary arts, and more. The platform focuses on aligning financial products with career advancement, regardless of an individual’s credit background, and emphasizes outcomes-driven partnerships with institutions offering high-impact training.

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Responsibilities:
  • Developed instant-decision loan processing software that handled $40M+ in funded applications with <0.01% error rate, significantly improving speed and efficiency while reducing team size;
  • Designed and implemented a unified application system covering loans, payment plans, and billing, streamlining financing for all students within partner institutions;
  • Delivered seamless B2B and B2C software integrations that became a key differentiator cited by clients despite competitive financial alternatives;
  • Set the strategic direction for both the engineering team and broader company initiatives;
  • Oversaw technical execution of underwriting policies, compliance protocols, and customer support operations during a transitional period;
  • Led marketing and advertising initiatives that directly increased application volume by over 30%;
  • Recruited, mentored, and led a high-performing cross-functional team to execute across engineering, operations, and growth efforts.
Project Tech stack:
JavaScript
Node.js
MongoDB
React
Director of Engineering
Apr 2011 - Aug 20154 years 4 months
Project Overview

A technology platform designed to help organizations harness the power of relationship networks to gain a strategic advantage. It enables users to map and analyze connections with key decision-makers across a curated database of over 1 million organizations and 3.5 million affiliated individuals. The platform supports use cases across corporate, financial, and nonprofit sectors, helping drive improved business outcomes through enhanced relationship intelligence and informed outreach strategies.

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Responsibilities:
  • Designed and developed data ingestion and normalization systems to unify third-party data under a common schema and taxonomy;
  • Built entity resolution and conflict detection pipelines to link equivalent records and resolve discrepancies across data sources;
  • Integrated proprietary research layers and automated error detection mechanisms to support high-quality data operations;
  • Led the architecture and implementation of a modular 3-tier application structure with enforced compile-time boundaries;
  • Established CI/CD pipelines with separate environments for testing, patching, and production to ensure stable deployments;
  • Developed systems for user management, auditing, activity tracking, and application-level caching;
  • Played a key role in designing infrastructure for zero-downtime releases and disaster recovery protocols;
  • Spearheaded the development of multiple client-facing features, including advanced search, relationship mapping, alerts, and mobile apps;
  • Authored internal training programs and was named as an inventor on two patent applications related to core platform technology.
Project Tech stack:
.NET
C#
Microsoft SQL Server
ASP.NET MVC
CI
CD
D3.js
Objective C
iOS
Senior Engineer / Team Lead
May 2007 - Apr 20113 years 10 months
Project Overview

A platform delivering integrated financial data and technology solutions designed for global financial professionals. It provides in-depth information on companies, markets, and key industry players, alongside advanced analytical tools for desktop research and investment analysis. The solution supports a wide range of use cases across investment banking, asset management, private equity, corporate strategy, and academia, enabling users to uncover opportunities, generate insights, and optimize decision-making. Founded in 1999, the platform has become a trusted resource in the financial services ecosystem.

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Responsibilities:
  • Led engineering teams of 2–5 developers across multiple projects, ensuring timely and high-quality delivery;
  • Initiated and drove efforts to centralize shared functionality, significantly reducing code duplication across the codebase;
  • Oversaw development within the Estimates and Report Builder teams, delivering tools that contributed to multi-million-dollar annual revenue;
  • Integrated third-party data feeds from providers such as Thomson and Reuters to enhance platform capabilities;
  • Implemented software solutions enabling export of reports to various file formats, improving user flexibility and reporting efficiency;
  • Conducted numerous technical interviews for both on-site and campus recruiting, supporting the growth of the engineering team;
  • Designed and led training sessions to help non-technical stakeholders better understand core technologies and system functionality.
Project Tech stack:
C#
ASP.NET
Microsoft SQL Server
Visual Basic (VB)

Education

2007
Computer Science
BS and MS

Languages

English
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