Full-Time

Senior Software Engineer

Posted on 11/22/2025

TSYS

TSYS

5,001-10,000 employees

Payment processing, gateways, and card services

No salary listed

Belfast, UK

In Person

Category
Software Engineering (1)
Requirements
  • BSc or MSc or equivalent in Computer Science or related field
  • Working experience in C++ or C (ability to learn C++ if only C background)
  • Experience of at least one of XML, JSON, HTML
  • Passion for and self-motivated interest in Software Development as a profession, not just a job
  • Strong analytical, problem-solving, communication and organizational skills
  • Must be proactive, self-motivated, attentive to detail, and able to work well under pressure
  • Strong communication skills
  • Team player with a desire to learn from more experienced engineers and develop themselves
  • Able to take ownership of, and responsibility for, assigned work
  • Eligibility to work in the United Kingdom on a full time and permanent basis
Responsibilities
  • Designing and developing applications to leverage traditional card and evolving mobile payment technologies, including Smart Card (“Chip and PIN”), Contactless Cards, Android Pay, Apple Pay, Samsung Pay etc.
  • Using C++ and C programming languages to deliver high quality, easily maintainable production code
  • Developing secure software, using hardware acceleration and trusted computing modules to securely capture, store and transmit sensitive payment data
  • Implementing secure end-to-end transactions, featuring synchronous and asynchronous cryptographic algorithms and digital signatures
  • Participating in the entire software development lifecycle, from requirements analysis through software and test design, implementation and unit testing, to verification and release.hiding, and separation of interface and implementation
  • As part of a customer-focused team, seek understanding of and value in our customer’s requirements, and actively shape the product from an engineering standpoint
  • Participating in team workshops to generate ideas and high-quality technical solutions – picking the right solution whilst balancing idealism and pragmatism
  • Assisting with troubleshooting and repairing defects
  • Simplifying and improving existing technical methodologies
  • Adhering to and applying overarching internal practices and policies with respect to coding standards, unit testing, lean development, and status reports.
  • Assist with training, motivating, mentoring and serve as mentor to others on the team
Desired Qualifications
  • Experience with Design Patterns, Refactoring, OO Design and related areas is advantageous
  • Experience in Linux development is advantageous
  • Experience of Java and Android development is advantageous

TSYS provides payment processing and related solutions to banks, merchants, and consumers. It works through three segments—Issuer Solutions, Merchant Solutions, and Consumer Solutions (Netspend)—to handle card and POS processing, mobile payments, and online gateways such as MultiPASS and Authorize.Net, with fraud management and analytics to support secure transactions. The company moves electronic payments between card networks, issuers, merchants, and consumers across in-person, online, and mobile channels. It differentiates itself with a large North American footprint (about 40% market share for third-party issuer processing), an integrated ecosystem built through acquisitions and a merger, and scale serving millions of merchants and hundreds of institutions worldwide. Its goal is to provide a complete, secure payments infrastructure that enables broad reach and omnichannel payment options for issuers, merchants, and consumers.

Company Size

5,001-10,000

Company Stage

Acquired

Total Funding

$35B

Headquarters

Columbus, Georgia

Founded

1983

Simplify Jobs

Simplify's Take

What believers are saying

  • Infonox $50M acquisition boosts transaction software for volume surge.
  • AWS partnership enables cloud migration with AI-driven secure innovation.
  • Long-term RBS deal secures UK, Irish, US payment processing revenue.

What critics are saying

  • Global Payments integration fails, eroding synergies through 2027.
  • Fintechs Stripe, Square capture SMB acquiring share by 2028.
  • Visa, Mastercard direct acquiring disintermediates Merchant Solutions.

What makes TSYS unique

  • TSYS holds 40% North American market share in issuer solutions processing.
  • Netspend prepaid cards target underbanked consumers since 2013 acquisition.
  • TS2 processing system developed in 1992 powers core issuer operations.

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Benefits

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Paid Vacation

401(k) Retirement Plan

Employee Referral Bonus

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Company News

FIS Global
Apr 6th, 2026
FIS Completes Strategic Acquisition of Global Payments’ Issuer Solutions Business and Sale of Worldpay Stake - Press Releases | FIS

FIS®, a global leader in financial technology, today announced the completion of its acquisition of Global Payments' Issuer Solutions business, formerly known as TSYS.

Securities and Exchange Commission
Apr 6th, 2026
EX-99.1

Merger of equals creates the preeminent technology-enabled payments company with extensive scale and unmatched global reach

Boland Hill Media, LLC
Apr 6th, 2026
With Infonox, TSYS Acquiring Gears up for Boom in Transactions - Digital Transactions

With its $50-million acquisition of Sunnyvale, Calif.-based software house Infonox Inc., TSYS Inc. h

PYMNTS
May 6th, 2025
Global Payments Bets Big On $600M Synergy From Worldpay

A $22 billion acquisition is a tough act to follow. But TSYS-parent Global Payments is betting big on its $600 million synergy target as it pushes forward with the $22.7 billion acquisition of Worldpay, a move that is expected to shake up the competitive dynamics in merchant services and payments technology. The acquisition, announced in April and expected to close in the first half of 2026, will see Global Payments divest its Issuer Solutions business to FIS for $13.5 billion, sharpening its focus as a pure-play merchant solutions provider. The combined entity will serve more than 6 million customers in 175 countries, processing $3.7 trillion in annual payment volume and 94 billion transactions — a scale that positions the company among the world’s largest payment processors. Central to the strategic rationale is an ambitious plan to realize $600 million in annual run-rate cost synergies within three years of closing. According to Global Payments, roughly a third of these savings will come from consolidating technology infrastructure and eliminating duplicative vendor and software spend

PYMNTS
May 6th, 2025
FIS Acquires Global Payments' Issuing Unit

Fidelity National Information Services (FIS) reported strong demand from banks for modernizing core banking systems during its Q1 earnings report. The company highlighted its pending acquisition of Global Payments' issuing solutions unit, which is expected to enhance cross-selling opportunities with banks.

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