John Montgomery
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John Montgomery Email & Phone Number

Backend-Focused Senior Software Engineer | ex-Palantir, ex-Affirm at Cedar
Location: Greater Philadelphia, United States 11 work roles 3 schools
1 work email found @affirm.com LinkedIn matched
✓ Verified August 2026 4 data sources Profile completeness 100%

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Work email j****@affirm.com
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Current company
Role
Backend-Focused Senior Software Engineer | ex-Palantir, ex-Affirm
Location
Greater Philadelphia, United States

Who is John Montgomery? Overview

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Quick answer

John Montgomery is listed as Backend-Focused Senior Software Engineer | ex-Palantir, ex-Affirm at Cedar, based in Greater Philadelphia, United States. AeroLeads shows a work email signal at affirm.com and a matched LinkedIn profile for John Montgomery.

John Montgomery previously worked as Software Engineer 3 at Cedar and Senior Software Engineer at Affirm. John Montgomery holds Master Of Business Administration (Mba) from Quantic School Of Business And Technology.

Company email context

Email format at Cedar

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{first}.{last}@affirm.com
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AeroLeads found 1 current-domain work email signal for John Montgomery. Compare company email patterns before reaching out.

Profile bio

About John Montgomery

I'm passionate about the ways we can use technology to promote health, safety, equality, and justice in the world. I've done work to help protect our country and its warfighters, integrated new data and enhanced data access to streamline judicial work, and improved the drug approval process for the FDA and pharmaceutical companies.

Listed skills include Computer Science, Machine Learning, Python, Java, and 16 others.

Current workplace

John Montgomery's current company

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Cedar
Cedar
Backend-Focused Senior Software Engineer | ex-Palantir, ex-Affirm
AeroLeads page
11 roles

John Montgomery work experience

A career timeline built from the work history available for this profile.

Software Engineer 3

Current

New York, New York , Us

Nov 2024 - Present

Senior Software Engineer

San Francisco, California, Us

Led or contributed to various efforts on the Identity Decisioning team including:* Improved and maintained Affirm's existing US identity decisioning codebase, added new capabilities, fixed bugs, met compliance regulations, and decreased latency. * Built a generalized identity decisioning framework to scale Affirm's reach to an international level. Aided in inaugural usage of this framework in Australia.* Migrated existing Canada code to this international framework for code, complexity, and cost savings and to validate the international framework capabilities.* Designed and built changes necessary for enabling identity decisioning capabilities in the UK.* Implemented integrations with new third party vendors and migrated existing integrations to new vendors for increased capabilities, meeting compliance goals, improved latency, and decreased cost. * Served in an oncall rotation for the entire Trust & Safety organization at Affirm, including various additional efforts such as leading a T&S latency reduction initiative for meeting SLAs for a critical partner and creating best practices for k8s.* Onboarded two new engineers to the team, and provided mentorship to them and other engineers on my team.* Performed hiring interviews and was selected as one of Affirm's "high-signal" interviewers for a critical hiring effort across the company.

May 2021 - Jul 2024

Senior Software Engineer

Conshohocken, Pennsylvania, Us

Served as architect for numerous projects including a TCP-multicast traffic-shaping proxy, a situational awareness dashboard and the data ingest pipeline to populate it, and a project for rewriting the messaging component of TAK server to be more scalable and reliable.Built and set up situational awareness dashboard using InfluxDB, Grafana, and PostgreSQL. Created data ingestion pipeline to populate this dashboard using Telegraf and Python.Conducted over two dozen engineering interviews ranging in experience level from associate to principal.

Jun 2020 - Apr 2021

Senior Software Engineer

Blue Bell, Pennsylvania, Us

Improved Pinnacle 21's primary product by adding new features, fixing bugs, and improving performance of critical pages.Served as lead developer on our product’s latest patch release.Remediated vulnerabilities in our primary product in response to a customer’s penetration test, and fixed several extra vulnerabilities that I discovered during my own penetration testing.Identified and resolved severe issue affecting the accuracy of all of our customers’ audit logs without losing any audit data and served as primary contact for customers during the time between discovery of the issue and resolution.

Sep 2019 - Apr 2020

Senior Software Engineer

Mclean, Va, Us

Built backend scheduling system using Spring Boot on AWS for recurring transfers to replace slow, expensive, legacy vendor software.Built data processing system with Python for migrating customers from legacy banking systems to our modern, central system to reduce the ongoing administrative burden of Capital One supporting multiple redundant systemsTaught classes on application security and secure coding to developers.Mentored two junior developers on my team.

Aug 2018 - Aug 2019

Forward Deployed Engineer

Denver, Colorado, Us

Forward Deployed Engineer supporting, enhancing, automating, and expanding various Palantir deployments. Primarily working in the law enforcement and military space. Key accomplishments include:* Designed and deployed load balancing system for Homeland Security Investigation's case management system, which allowed our team to do the first rolling restart of a particular system at the company.* Built data integrations for the federated search system for the same case management system to allow investigations to be completed across a wide range of data sources while providing strong audit capabilities to ensure the system isn't abused.* Automated various data integration and system maintenance tasks to decrease the manual effort needed to support various customers and free up employees to focus on more impactful work.

Oct 2014 - Jul 2018

Cto

Lawgo

Oversaw and directed all technical projects for the company, including maintaining website servers, developing new features, finding and contacting potential customers in an automated way, fixing bugs, brainstorming future technical work, and identifying potential technical road blocks for the company to be aware of.

Jun 2015 - Sep 2016

Cryptologic Computer Scientist

Washington, Dc, Us

Computer scientist developing and supporting large-scale cryptology processes.

Jul 2010 - Sep 2014

Graduate Student

Baltimore, Md, Us

Completed M.S. of Computer Science. Master's research was focused on authorship attribution of malware based solely on the compiled binaries.

Aug 2010 - May 2014

Research Assistant

University Park, Pa, Us

Worked as a research assistant in the Statistics department under Dr. David Hunter building and optimizing epidemiology modeling programs.

Sep 2009 - Aug 2010

Research Assistant

University Park, Pa, Us

Worked as a research assistant in the Computer Science department, first under Associate Professor Sanjukta Bhowmick, and later under Professor Padma Raghavan. Research topics included using graph coloring algorithms to optimize sparse matrix factorization algorithms, and analysis of cache-level utilization optimization for distributed matrix factorization software suites.

Oct 2008 - Aug 2009
3 education records

John Montgomery education

Master Of Business Administration (Mba)

Quantic School Of Business And Technology

Master'S Degree, Computer Science

University Of Maryland Baltimore County

Bachelor Of Science, Computer Science, Minor In Psychology

Penn State University
FAQ

Frequently asked questions about John Montgomery

Quick answers generated from the profile data available on this page.

What company does John Montgomery work for?

John Montgomery works for Cedar.

What is John Montgomery's role at Cedar?

John Montgomery is listed as Backend-Focused Senior Software Engineer | ex-Palantir, ex-Affirm at Cedar.

What is John Montgomery's email address?

AeroLeads has found 1 work email signal at @affirm.com for John Montgomery at Cedar.

Where is John Montgomery based?

John Montgomery is based in Greater Philadelphia, United States while working with Cedar.

What companies has John Montgomery worked for?

John Montgomery has worked for Cedar, Affirm, Syzygy Integration, Pinnacle 21, and Capital One.

How can I contact John Montgomery?

You can use AeroLeads to view verified contact signals for John Montgomery at Cedar, including work email, phone, and LinkedIn data when available.

What schools did John Montgomery attend?

John Montgomery holds Master Of Business Administration (Mba) from Quantic School Of Business And Technology.

What skills is John Montgomery known for?

John Montgomery is listed with skills including Computer Science, Machine Learning, Python, Java, C++, Html, Unix, and Research.

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