Full-Time

Junior Backend Software Engineer

Posted on 8/26/2025

CardFlight

CardFlight

51-200 employees

Mobile point-of-sale processing for in-person payments

Compensation Overview

$113k - $133k/yr

+ Base Salary Bonus + Equity Awards

United States

Hybrid

Hybrid role with in-person onboarding at listed U.S. locations: Atlanta, GA; Lincoln or Omaha, NE; Nashville, TN; New York City, NY.

Category
Software Engineering (1)
Requirements
  • 1+ years of backend service/API software development
  • Experience with Ruby on Rails
  • Willingness to learn and work in a variety of technologies as well as play a dual development and quality engineer role
  • Excellent communication and collaboration skills and interest in working with third parties
  • Ability to be flexible and flourish in a fast-paced atmosphere while remaining focused with an attention to detail, working productively, and successfully juggling multiple tasks
Responsibilities
  • Developing and Testing - Collaborate with a team of talented engineers to continuously build, ship, learn, and iterate on our products
  • Developing and Testing - Implement backend service/API changes and bug fixes to support code certifications of new and existing functionality
  • Developing and Testing - Execute manual and automated test cases and track open issues during a certification
  • Technical Support - Support operations team with customer-facing technical issues
  • Technical Support - Collaborate with third parties on code certifications, tracking and communicating status as well as working through issues

CardFlight provides mobile point-of-sale payment technology for merchants. It began with an SDK that lets businesses accept in-person credit card payments through mobile apps and built SwipeSimple, a POS app popular with small businesses for its ease of use. The product works by integrating payment processing into mobile devices via the SDK and a card reader, enabling merchants to process card payments in-person through a smartphone or tablet. CardFlight differentiates itself through a developer-focused approach that partners with merchant service providers, banks, and ISOs, enabling other businesses to embed payment capabilities into their own apps, along with a proven track record demonstrated by a large customer base and multiple funding rounds. Its goal is to make mobile payments simpler for merchants by expanding access to reliable, integrated payment tools and growing its SDK and SwipeSimple platform through strategic partnerships.

Company Size

51-200

Company Stage

Series A

Total Funding

$10.1M

Headquarters

New York City, New York

Founded

2013

Simplify Jobs

Simplify's Take

What believers are saying

  • Adam Bloomston joined board in 2024, scaling payments via marketing expertise.
  • WestView Capital invested October 2024, adding Kevin Twomey to board.
  • Tap to Pay on iPhone launched October 2025 for Worldpay merchants.

What critics are saying

  • Square captures 40% SMB volume with free readers, eroding market share.
  • Stripe Terminal lets Worldpay integrate directly, bypassing SwipeSimple.
  • Payroc poaches CardFlight's 200+ partners using $120B processing scale.

What makes CardFlight unique

  • SwipeSimple enables payments on phone, tablet, computer without extra hardware.
  • First-to-market EMV Quick Chip for mobile point-of-sale solutions.
  • Partners with 200+ ISOs, MSPs, banks for SMB payment acceptance.

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Benefits

Remote Work Options

Home Office Stipend

Unlimited Paid Time Off

Health Insurance

Stock Options

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

1%

2 year growth

1%
PR Newswire
Jan 27th, 2026
CardFlight adds payments veteran Adam Bloomston to board of directors

CardFlight has appointed Adam Bloomston to its board of directors. Bloomston co-founded Payscape and helped build the business through its acquisition by Parthenon Capital, where it became a foundational pillar in growing Payroc. Payroc now ranks among North America's top merchant acquirers, processing over $120 billion in payment volume annually for more than 185,000 customers. Bloomston brings extensive experience scaling payments organisations, with expertise in marketing, sales execution and payments industry strategy. CardFlight, maker of the SwipeSimple payments platform, serves over 125,000 merchants. The company received a growth investment from WestView Capital Partners in October 2024. CardFlight CEO Derek Webster said Bloomston's experience building and scaling payments platforms will be valuable as the company expands its ecosystem.

CardFlight
Jan 27th, 2026
CardFlight Appoints Adam Bloomston to Board of Directors

CardFlight appoints Adam Bloomston to Board of Directors. CardFlight NEW YORK, N.Y., - CardFlight today announced that Adam Bloomston has joined its Board of Directors. Bloomston was the co-founder of Payscape, helping to build the business through its acquisition by Parthenon Capital, where Payscape's business was a foundational pillar in growing Payroc. Today, Payroc ranks among the top merchant acquirers in North America, processing more than $120 billion in payment volume annually for over 185,000 customers. He brings deep experience scaling payments organizations, with strengths across marketing, sales execution, and payments industry strategy. Derek Webster, Founder and CEO of CardFlight, said: "Adam has a rare blend of payments expertise, operational pragmatism and proven go-to-market leadership. His experience building and scaling payments platforms will be invaluable as we continue expanding CardFlight and the SwipeSimple ecosystem." "I am excited to join CardFlight's board and support the team as they continue to deliver practical, high-impact payments solutions for SMBs. CardFlight has built a strong platform and a great team. I look forward to contributing to the next phase of growth." Kevin Twomey, Partner at WestView Capital Partners, said: "We're grateful to have Adam's leadership experience and perspective on the Board of Directors, as CardFlight continues to scale the number and breadth of small business customers it serves." Bloomston also serves on the board of Payroc. CardFlight, Inc. is the maker of SwipeSimple, a practical payments platform built for how businesses work in the real world. Trusted by more than 125,000+ merchants, SwipeSimple keeps business moving from the field to the front desk to the back office with easy tools for CRM, invoicing and subscriptions, saved cards, installments, recurring payments, payment links, and plain-English reporting. SwipeSimple enables businesses to accept payments anywhere on phone, tablet, computer, or compatible terminals, helping them grow and focus on what they do best - serving their customers. CardFlight [email protected]

PR Newswire
Oct 23rd, 2025
Tap to Pay on iPhone Now Available to Worldpay Merchants Using SwipeSimple

Tap to Pay on iPhone now available to Worldpay merchants using SwipeSimple. News provided by. Merchants using SwipeSimple can now accept all types of in-person, contactless payments right on their iPhone. Terms apply. NEW YORK, Oct. 23, 2025 /PRNewswire/ - CardFlight, Inc, and Worldpay(R), a global leader in payment technology, today announced Tap to Pay on iPhone is now available to all SwipeSimple(R) merchants. Tap to Pay on iPhone is an easy, private, and secure way to ensure a SwipeSimple Worldpay merchant will always have the tools needed to accept a payment right on their iPhone - no additional hardware or payment terminal needed. With Tap to Pay on iPhone, at checkout, merchants will simply prompt the customer to hold their contactless payment method - such as a contactless debit or credit card, Apple Pay, or other digital wallet - near the merchant's iPhone, and the payment will be securely completed using NFC technology. Apple's Tap to Pay on iPhone technology uses the built-in security and privacy features of iPhone to help protect your business and customer data. Apple doesn't store card numbers or transaction information on the device or on Apple servers, so merchants and customers can rest assured that their data stays theirs.* "With Tap to Pay on iPhone and SwipeSimple, our merchants have access to flexible options enabling them to take payments wherever they do business, using a device they already have in their pocket," said Cindy Turner, chief product officer, Worldpay. "It's a natural upgrade for service business, professional offices, local retail, and for growing teams that want speed and reliability." "SwipeSimple is built to make in-person payments easy and Tap to Pay on iPhone complements our mission perfectly," said Robert Newton, VP of Product at CardFlight. "Merchants can begin using it immediately after opting in and keep payments flowing with the iPhone they already carry." How it Works (No Extra Hardware) Available today for Worldpay merchants using SwipeSimple. Accept contactless debit or credit cards, Apple Pay, and other digital wallets, right on an iPhone. * Open the SwipeSimple app on an iPhone and enter any amount on the screen to process a transaction. * Present the iPhone to the customer. * The customer holds their card horizontally or their device at the top of your iPhone, over the contactless symbol for a few seconds. * When the Done checkmark appears, the card read is complete and the transaction is being processed. For more information, please visit swipesimple.com/tap-to-pay-on-iphone. About SwipeSimple by CardFlight, Inc. SwipeSimple, by CardFlight, Inc., is the practical payments platform built for how businesses work in the real world. Trusted by more than 125,000+ merchants, SwipeSimple keeps business moving from the field to the front desk to the back office with easy tools for CRM, invoicing and subscriptions, saved cards, deposits and installments, recurring payments, payment links, and plain-English reporting. SwipeSimple enables businesses to accept payments anywhere on phone, tablet, computer, or compatible terminals, helping them grow and focus on what they do best - serving their customers. *Encrypted card numbers are temporarily stored on iPhone only for transactions made in Store and Forward mode. Tap to Pay on iPhone Requirements: Tap to Pay on iPhone requires a supported payment app and the latest version of iOS.

Financial Technology Insights
Mar 26th, 2025
CardFlight to Showcase SwipeSimple Innovations at ETA TRANSACT 2025

CardFlight to showcase SwipeSimple innovations at ETA TRANSACT 2025.

Boland Hill Media, LLC
Dec 11th, 2024
CardFlight Eases Card-on-File Access; Bill Debuts 1099 Form Filing Service

CardFlight launched SwipeSimple in 2014.

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