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Top IT Companies in Belfast (122)

Persistent Systems
Artificial Intelligence • Cloud • Information Technology • Software • Cybersecurity • App development • Big Data Analytics
54 Offices
23,000 Employees
18 Benefits
See Beyond, Rise Above

Persistent Systems is a leading provider of digital transformation services, offering innovative solutions tailored to various industries worldwide. With a robust global presence, they deliver cutting-edge services in product engineering, digital strategy, and data analytics, helping businesses thrive in today's rapidly evolving landscape. From healthcare and financial services to retail and manufacturing, Persistent Systems empowers organizations across diverse sectors to...

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Persistent Systems
JOOR
eCommerce • Fashion • Information Technology • Retail
8 Offices
251 Employees
33 Benefits
JOOR is smooth, smart wholesale technology for brands and retailers.

JOOR is the world’s premiere, wholesale management platform for fashion, beauty and home, connecting 13,300+ brands and 380,000+ retailers across 150 countries every day. Backed by Macquarie Group, Battery Ventures, Canaan Partners & ITOCHU, JOOR is a Series D start-up that provides the world's most recognized brands and retailers with a digital wholesale management platform that transforms the way these...

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JOOR
Kyndryl
Cloud • Information Technology • Consulting
16 Offices
46,070 Employees
30 Benefits

We have the world’s best talent that design, run, and manage the most advanced and reliable technology infrastructure each day. Together, we think holistically about the health of these vital technology ecosystems. We are a focused, independent company that builds on our foundation of excellence by creating systems in new ways. Bringing in the right partners, investing in our business, and...

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Kyndryl

Kyndryl's Top Stability & Growth Strengths

Profitability: Results indicate a swing to pretax profitability with strong year-over-year improvements in EBITDA and guidance pointing to continued earnings and free‑cash‑flow growth.

Strategic Partnerships: Alliances with major hyperscalers are scaling rapidly, with partner‑tied revenue more than doubling and management signaling momentum toward stated targets.

Strong Market Position & Advantage: Recognition as a Leader by major analyst firms in data center outsourcing, digital workplace, managed cloud operations, and mainframe services, combined with global scale, supports a strong position in mission‑critical infrastructure.

First Advantage
Information Technology
2 Offices
3,712 Employees
28 Benefits

First Advantage delivers comprehensive background check solutions and insights that enable employers and housing providers to make confident choices, reduce risk, and maintain compliance. With offices in 26 locations and a staff of 4,000+ employees, First Advantage leverages leading technology and the industry’s largest global capabilities to complete background checks in 200+ countries and territories. If you’re looking for employee...

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First Advantage

First Advantage's Top Stability & Growth Strengths

Strong Market Position & Advantage: First Advantage is positioned as a top-tier provider in background screening following the Sterling Check acquisition, creating a combined business with substantial scale and broad product capabilities. The company’s global footprint and deep enterprise penetration support competitiveness for large, compliance-sensitive programs.

Strong Revenue Growth: Revenue expanded materially from 2024 to 2025, reflecting the step-change from the Sterling acquisition alongside cited commercial momentum. Forward guidance for 2026 indicates continued year-over-year top-line growth off the larger base.

Customer Loyalty & Retention: Customer retention is described as strong, with retention in the mid-to-high range and notable growth attributed to upsell, cross-sell, and new logos. This suggests a relatively sticky customer base supporting resilience through varying hiring cycles.

Informa
Artificial Intelligence • Information Technology • Business Intelligence
26 Offices
3,741 Employees
13 Benefits

Informa is a leading international intelligence, events and scholarly research group. We're here to champion the specialist, connecting people with knowledge to help them learn more, know more and do more. We're a FTSE 100 company with 10,000 colleagues working in over 30 countries and a presence in all major regions, including North America, South America, Asia, Europe, the Middle East...

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Informa
Systems Limited MEA
Artificial Intelligence • Cloud • Information Technology • Automation
2 Offices
420 Employees

Systems MEA is an MEA-based subsidiary of Pakistan's largest IT company, Systems Limited, which houses a skilled workforce of 7000+ employees globally. Our experience spans to 4 decades with a presence across 5 continents. Our satisfied industry leading clientele of 400+ public and private institutions is a testament to our unparalleled digital solutions. We aspire to enable businesses to build...

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Systems Limited MEA
Snap-on Business Solutions
Information Technology • Software
2 Offices
820 Employees
3 Benefits

Snap-on Business Solutions (SBS) is a part of Snap-on Incorporated’s Repair Systems & Information Group. SBS is based in Richfield, Ohio. We are focused on helping vehicle and equipment manufacturers and their dealership networks increase sales, reduce structural costs, and improve customer experiences. We design information solutions, diagnostic systems, and essential tools and equipment programs that grow sales and...

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Snap-on Business Solutions
Millgate
Hardware • Information Technology • Software
2 Offices
139 Employees

At Millgate, our guiding principle is deceptively simple: we deliver tech products, services and solutions that actually work for your business needs. In nearly 30 years since our inception, Millgate has developed a reputation as a trusted adviser to our clients, able to understand their requirements and provide the very best IT & Tech solutions to meet and exceed their individual...

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Millgate
Electrosonic
Digital Media • Information Technology • Design
12 Offices
496 Employees
22 Benefits

Electrosonic designs, builds and supports innovative technology solutions that create lasting experiences where people live, work and play. Electrosonic is an international audiovisual company with a strong reputation for working on complex projects, both large and small, and has through its over 55 year history developed lasting partnerships with customers and suppliers. Electrosonic brings a unique breadth of experience to each...

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Electrosonic
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Founders Factory
Information Technology
2 Offices
105 Employees

Founders Factory builds and funds startups together with exceptional entrepreneurs and the world’s leading companies. Created by serial entrepreneurs Brent Hoberman and Henry Lane Fox, Founders Factory backs entrepreneurs with capital, operational support from a team of hands-on experts, and unrivalled access to industry leaders like Aviva, Rio Tinto, Aviva, Guardian Media Group, Deutsche Telekom, Pico, Netcare, Standard Bank, Nesta, Johnson...

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Founders Factory
Crossvale
Information Technology • Consulting
2 Offices
68 Employees
13 Benefits

We are an IT services company that provides solutions to companies of every size - from small companies to some of the largest global enterprises. Our specialties are: - Digital Transformation - Enterprise Architecture - RedHat OpenShift (PaaS) - RedHat OpenStack (IaaS) - Business Process Management - Service Oriented Architecture (SOA) - Integration - Cloud, Hybrid and On-Prem solutions - MEAN Stack (Mongo, Express, Angular Node) We have operations in USA,...

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Crossvale
Cirdan
Information Technology • Manufacturing
2 Offices
94 Employees

Cirdan designs, manufactures and supplies innovative software and imaging solutions for the acceleration and enhancement of diagnosis. Our systems are optimised for pathology and clinical laboratory usage. Cirdan’s primary product is its world-class Laboratory Information System, ULTRA. ULTRA has been designed to streamline laboratory operations and is currently installed in more than 72 laboratories across 6 continents. Another core product...

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Cirdan
Unosquare
Information Technology
6 Offices
884 Employees

Unosquare provides custom software development with agile software delivery professionals for Healthcare, Financial Services, and High Tech customers. We do this work from the USA, Latin America, and the United Kingdom. With over 2,500 successfully completed projects, nearly 600 full-time employees, and 100 active distributed teams, Unosquare has been one of the fastest growing private businesses in the USA with...

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Unosquare
Aztech IT Solutions
Information Technology • Cybersecurity
2 Offices
61 Employees
4 Benefits

Aztech IT Solutions is trusted by more than one hundred growing businesses across the UK to deliver professional, proactive IT support services. Aztech provides the IT support and consultancy services that enable organisations to operate more efficiently, safe in the knowledge that their IT systems are optimised and proactively managed. Your IT partner should work as hard to improve your...

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Aztech IT Solutions
Ensono
Cloud • Information Technology
12 Offices
3,000 Employees
14 Benefits Hiring Now
Support mission critical workloads, modernize IT infrastructure and reduce total cost of ownership.

Ensono helps IT leaders be the catalyst for change by harnessing the power of hybrid IT to transform their businesses. Our broad services portfolio from mainframe to cloud, powered by an intelligent governance platform, is designed to help our clients operate for today and optimize for tomorrow. We are award-winning certified experts in AWS & Azure

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Ensono

Ensono's Top Stability & Growth Strengths

Strong Revenue Growth: Company disclosures indicate revenue expanded from about $224M at inception to roughly $1.1B and clients grew to 250+ by January 2026, reflecting sustained scale-up. Additional signals such as headcount increases and the launch of an AI & Innovation Division reinforce ongoing momentum.

Strong Market Position & Advantage: Multiple independent analyst assessments (ISG, Everest, IDC) place the company as a Leader in mainframe services and modernization, with Gartner listing it in a 2024 Market Guide for the niche. Credentials like the AWS Mainframe Modernization Competency and public-sector recognitions further underpin competitive strength in this segment.

Investor Backing & Capital Strength: Ownership by KKR since 2021 and a stated $250M, five‑year AI investment plan indicate access to capital supporting expansion and R&D. Capability-expanding acquisitions such as Amido and ExperSolve align with a funded growth strategy.

Sinch
Big Data • Cloud • Information Technology • Marketing Tech • Mobile
4 Offices
1,520 Employees
27 Benefits

Sinch brings businesses and people closer with tools enabling personal engagement. Our leading cloud communications platform lets businesses reach every mobile phone on the planet, in seconds or less, through mobile messaging, voice, and video. Our global headquarters are in Stockholm, Sweden, and we have a local presence in more than 30 countries - probably somewhere near you!

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Sinch
O2
Information Technology • Mobile
21 Offices
5,230 Employees
15 Benefits

O2 is the commercial brand of Telefónica UK Limited and is a leading digital communications company with the highest customer satisfaction for any mobile provider according to Ofcom. With over 23 million customers, O2 runs 2G, 3G, 4G and 5G networks across the UK, as well as operating O2 Wifi and owning half of Tesco Mobile. O2 has over 450...

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O2
Reply
Information Technology • Consulting
35 Offices
4,171 Employees
11 Benefits

Reply [EXM, STAR: REY] specialises in the design and implementation of solutions based on new communication channels and digital media. As a network of highly specialised companies, Reply defines and develops business models enabled by the new models of AI, big data, cloud computing, digital media and the internet of things. Reply delivers consulting, system integration and digital services to...

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Reply
OUTSOURCE
Information Technology • Cybersecurity
5 Offices
46 Employees

An award winning, locally owned, IT Managed Security Services Provider (MSSP) working with SME/Enterprise customers across the UK, Ireland and internationally. Outsource solutions and services, covering from 'the desktop to the data centre' are all underpinned by our "Security First" approach and focus on improving the security, performance and productivity of every company we partner with. We also offer a suite...

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OUTSOURCE
UNRVLD
eCommerce • Information Technology • Analytics
6 Offices
220 Employees

UNRVLD is a digital experience and technology agency that puts business outcomes first. We work with results driven organisations worldwide where digital experience is business critical. Our digital specialists put value creation at the heart of everything we do. We deliver the outcomes our clients need to become more than just better. Being unrivalled is about setting a new standard...

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UNRVLD

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