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Modulr Finance - Senior Software Engineer (Payment Infrastructure)

Jul 06, 2026  Twila Rosenbaum 22 views
Modulr Finance - Senior Software Engineer (Payment Infrastructure)

Introduction to Modulr Finance

Modulr Finance is a leading embedded payment infrastructure provider headquartered in London, United Kingdom, with additional offices in Edinburgh and Manchester. As a fully authorised electronic money institution (EMI) regulated by the Financial Conduct Authority (FCA), Modulr has established itself as a cornerstone of the modern payments ecosystem. The company serves over 3,000 businesses ranging from fast-growing fintechs to established enterprises, processing billions of pounds in transactions annually. Modulr's platform enables organisations to integrate payment capabilities directly into their own software, eliminating the need for traditional banking middleware and accelerating time-to-market for new financial products.

Recognised as a Top Technology Company in the UK by several industry analysts, Modulr has earned a reputation for reliability, security, and innovation. The company's API-first approach allows developers to build custom payment flows, manage virtual accounts, and orchestrate complex payment routing with minimal friction. Modulr's cloud-native infrastructure ensures high availability and scalability, making it a trusted partner for businesses that require mission-critical payment processing.

With a strong focus on compliance and regulatory excellence, Modulr holds direct connections to major UK and European clearing systems such as Faster Payments, Bacs, and CHAPS. This direct connectivity gives Modulr clients unparalleled speed and control over their payment operations. The company's culture of engineering excellence and customer-centricity has driven continuous investment in its technology stack, including real-time fraud detection, automated reconciliation, and open banking integrations. As Modulr continues to scale, it remains committed to removing complexity from payments and empowering businesses to innovate.

Company History and Business Evolution

Modulr was founded in 2015 by Myles Stephenson, a seasoned entrepreneur and technologist with a vision to simplify payment integration for businesses. The company initially operated as a stealth startup, focusing on building a robust API-based platform that could handle the complexities of modern payment orchestration. In 2018, Modulr secured its electronic money institution license from the FCA, marking a pivotal milestone that allowed it to hold client funds and offer regulated payment services directly.

Over the next few years, Modulr experienced rapid growth, raising significant venture capital funding from investors including Blenheim Chalcot, Fincapital, and PayPal Ventures. The company expanded its team from a handful of engineers to over 300 employees, with a strong emphasis on hiring top talent in software engineering, product management, and compliance. In 2020, Modulr launched its virtual account solution, which became a game-changer for platforms needing to manage sub-accounts and segregated funds for their end customers.

By 2021, Modulr had processed over £10 billion in transaction volume and partnered with major financial institutions such as Mastercard and Visa. The company also made strategic acquisitions to enhance its capabilities, including the purchase of a compliance technology firm to strengthen its anti-money laundering and fraud detection systems. In 2023, Modulr introduced its open banking integration, enabling real-time account-to-account payments and further solidifying its position as a leader in the embedded finance space.

The company's evolution has been marked by a relentless focus on innovation and customer success. Modulr's platform now supports multi-currency payments, automated reconciliation, and white-label payment solutions. The company is also exploring blockchain-based settlement rails and AI-driven payment routing to stay ahead of industry trends. Today, Modulr is recognised as one of the fastest-growing fintechs in Europe, with a clear roadmap to expand into new geographies and verticals.

Modulr Finance at a Glance

  • Headquarters: London, United Kingdom (with offices in Edinburgh and Manchester)
  • Founded: 2015
  • CEO: Myles Stephenson
  • Industry: Financial Technology (Embedded Payments)
  • Regulation: Authorised Electronic Money Institution (FCA)
  • Employees: ~350 (as of 2024)
  • Annual Transaction Volume: Over £20 billion processed
  • Funding Raised: ~£100 million (Series A, B, C from Blenheim Chalcot, PayPal Ventures, etc.)
  • Key Products: Payment APIs, Virtual Accounts, Automatic Reconciliation, Fraud Detection, Open Banking
  • Clearing Systems: Faster Payments, Bacs, CHAPS, SEPA
  • Partners: Mastercard, Visa, Barclays, HSBC
  • Client Base: 3,000+ businesses including fintechs, marketplaces, and SaaS platforms
  • Revenue: Estimated £30–50 million (2023)
  • Growth Rate: >100% YoY for past three years
  • Accolades: Top 100 Fintech Companies (Fintech50), Best Payment Infrastructure (UK Fintech Awards), Best Place to Work in Tech (2023)
  • Security: ISO 27001 certified, PCI DSS Level 1
  • Tech Stack: Cloud-native (AWS), microservices, Node.js, Go, PostgreSQL, Kafka, Kubernetes
  • Diversity Initiatives: Women in Engineering programme, mental health support, flexible work
  • Clients Include: Tide, Revolut, Sage, Just Eat, and hundreds of other digital platforms
  • Global Reach: Supports payments in 30+ currencies across 40 countries

Mission, Vision, and Core Corporate Values

Modulr Finance’s mission is to unlock the potential of every business by making payments as simple as they should be. The company envisions a world where payment infrastructure is invisible, instant, and infinitely scalable – enabling any organisation to move money with the same ease they send data. This vision drives every product decision and customer interaction.

Core corporate values form the bedrock of Modulr’s culture:

  • Engineer Simplicity: Modulr believes that complexity is the enemy of progress. The team works tirelessly to reduce friction in payment integration, offering clean APIs, comprehensive documentation, and responsive support.
  • Trust Through Transparency: As a regulated financial institution, Modulr prioritises transparent pricing, clear communication, and robust compliance. Customers always know where their money is and how it moves.
  • Relentless Innovation: The payments landscape evolves rapidly. Modulr stays ahead by investing in research, experimenting with new technologies, and releasing features that anticipate market needs.
  • Customer Obsession: Every team member is empowered to put the customer first. From product roadmaps to support responses, customer feedback directly shapes Modulr’s direction.
  • One Team, One Mission: Collaboration across engineering, compliance, sales, and operations is essential. Modulr fosters a culture of open communication and shared ownership.

These values are not just slogans; they are embedded in hiring criteria, performance reviews, and day-to-day decision-making. Employees regularly participate in values workshops and are recognised through a peer-nominated awards system that celebrates behaviours reflecting these principles.

Business Strategy and Future Roadmap

Modulr Finance’s strategic focus is threefold: deepening product capabilities, expanding geographic reach, and strengthening partnerships. In the near term, the company aims to enhance its platform with real-time liquidity management, intelligent payment routing, and embedded lending features. The product team is actively developing a no-code payment builder that will allow non-technical users to design custom payment flows without developer intervention.

Geographically, Modulr plans to enter the North American market by 2025, leveraging its existing partnerships with global card networks and clearing systems. The company is also exploring opportunities in Asia-Pacific, starting with Singapore and Australia. To support this expansion, Modulr is building a distributed engineering team that can operate across time zones while maintaining high code quality and security standards.

The future roadmap includes a strong emphasis on artificial intelligence and machine learning. Modulr is developing predictive fraud models that utilise real-time transaction data to stop threats before they materialise. Additionally, the company is researching blockchain integration for cross-border settlement, aiming to reduce costs and increase speed for international payments. Sustainability is also a priority: Modulr is committed to achieving net-zero carbon emissions by 2030 and has started offsetting its cloud infrastructure usage.

Acquisitions remain a key part of Modulr’s strategy. The company actively seeks fintech startups with complementary technologies, particularly in areas like identity verification, invoicing, and expense management. This M&A activity allows Modulr to accelerate innovation and offer a more comprehensive platform to its clients.

Products, Technologies, and Services

Modulr Finance delivers a comprehensive set of payment tools designed for developers and financial operations teams:

  • Payment APIs: RESTful and idempotent APIs enabling instant payments, bulk payments, and direct debits. APIs support Faster Payments, Bacs, CHAPS, and SEPA transfers.
  • Virtual Accounts: Create and manage an unlimited number of virtual IBANs to segregate client funds, manage customer balances, and automate reconciliation.
  • Automated Reconciliation: AI-driven matching of incoming payments to invoices or ledger entries, reducing manual effort by up to 90%.
  • Fraud Detection: Real-time risk scoring using behavioural analytics and customisable rules. Integrates with third-party KYC providers.
  • Open Banking: Direct account-to-account payments via PSD2 APIs, allowing customers to pay from their bank without a card.
  • White-Label Payments: Custom-branded payment experiences for platforms that want to offer financial services under their own brand.
  • Dashboard and Reporting: A web-based admin portal for transaction monitoring, user management, and custom reporting.

Technologically, Modulr runs on a microservices architecture deployed on AWS, with Kubernetes for orchestration and Kafka for event streaming. The primary languages are Node.js and Go for backend services, with React for frontend applications. PostgreSQL is the main database, while Redis handles caching and session management. The platform is designed for high availability with multi-region failover and can handle thousands of transactions per second.

Modulr also provides a sandbox environment with simulated payment rails, enabling developers to test integrations without real funds. Comprehensive SDKs are available for Python, Ruby, Java, and C#. The company regularly publishes API changelogs and migration guides to ensure backward compatibility.

Industries and Markets Served

Modulr’s platform is used across a diverse range of industries, each benefiting from embedded payment capabilities:

  • Fintechs: Challenger banks, digital wallets, and lending platforms use Modulr to launch payment products quickly without building their own infrastructure.
  • Marketplaces: Multi-sided platforms need to split payments between buyers and sellers, hold funds in escrow, and automate payouts. Modulr’s virtual accounts are ideal for this.
  • Insurance: Insurers use Modulr to process premium collections and claims disbursements, often requiring sub-account management for different policies.
  • Property and Real Estate: Property management platforms use Modulr to collect rent, manage deposits, and pay contractors.
  • Travel and Hospitality: OTAs and booking platforms use Modulr for supplier payments, refunds, and multi-currency settlements.
  • Professional Services: SaaS companies embed Modulr to bill clients via direct debit, reducing churn and improving cash flow.

Modulr also serves government agencies and non-profits that require transparent and efficient payment distribution. The company’s compliance-first approach ensures that all industries can meet regulatory requirements without additional overhead. Market expansion efforts are focusing on healthcare and education, where embedded payments can streamline patient billing and tuition collection.

Leadership and Management Philosophy

Modulr’s leadership team combines deep fintech expertise with a passion for engineering excellence. CEO Myles Stephenson previously founded and sold a payment processing company, giving him first-hand experience of the pain points Modulr solves. The CTO, Sarah Jennings, comes from a background in high-frequency trading systems, bringing a discipline of low-latency and high-reliability design.

The management philosophy at Modulr is built on empowerment and accountability. Teams are organised into small squads (typically 5–8 people) that own specific product areas end-to-end. Each squad includes engineers, a product manager, and a QA specialist, with full autonomy to decide how to achieve their objectives. This structure accelerates decision-making and fosters ownership.

Regular leadership summits, quarterly town halls, and an open-door policy ensure that everyone – from intern to VP – has a voice. Modulr also invests in leadership development programmes, training managers in emotional intelligence, conflict resolution, and coaching. The company believes that great leaders create great products, and it measures manager effectiveness through anonymous 360-degree feedback.

Corporate Events, Conferences, and Community Engagement

Modulr actively participates in and sponsors major fintech conferences worldwide, including Money 20/20, Finovate, Sibos, and the World Fintech Festival. At these events, Modulr showcases its latest product innovations and shares thought leadership on topics like open banking, embedded finance, and payment modernisation. The company also hosts its own annual customer summit, ModulrConnect, where clients network and preview future features.

Beyond conferences, Modulr engages with the developer community through hackathons, meetups, and open-source contributions. The company maintains several open-source libraries for payment SDKs and contributes to industry standards bodies like the Open API Initiative. Modulr also runs a university outreach programme, offering internships and mentoring to students from underrepresented backgrounds in technology.

Community engagement extends to charitable initiatives: Modulr partners with financial literacy charities to provide free educational resources on managing business finances. Employees are encouraged to volunteer and participate in payroll giving, and the company matches donations up to a certain amount. These efforts reinforce Modulr’s commitment to being a responsible corporate citizen.

Employees and Workplace Culture

Modulr Finance is consistently recognised as a Great Place to Work, with an employee net promoter score (eNPS) of +60. The culture is collaborative, innovative, and inclusive. Employees enjoy a hybrid working model with flexible hours, allowing them to balance personal and professional life. The London and Edinburgh offices are designed for collaboration, with open-plan layouts, quiet zones, and social spaces.

Modulr invests heavily in employee development. Every team member has a personal growth plan and access to a learning budget of £2,000 per year for courses, certifications, and conferences. The company also runs internal technical talks, lunch-and-learn sessions, and a mentorship programme that pairs junior engineers with senior leaders.

Diversity and inclusion are not afterthoughts. Modulr has employee resource groups for women in tech, LGBTQ+, and mental health awareness. The hiring process includes blind CV review and diversity panels to reduce bias. As a result, 40% of Modulr’s engineering team identifies as female or non-binary, well above the industry average.

Workplace culture is maintained through regular social events, team offsites, and recognition programmes. The ‘Modulr Hero’ award is given weekly to an employee who has gone above and beyond, with a cash prize and company-wide shoutout. This positive reinforcement keeps morale high and reinforces the values of collaboration and excellence.

Job Details & Requirements for this Posting

Role: Senior Software Engineer (Payment Infrastructure)

Modulr Finance is seeking an experienced Senior Software Engineer to join our core payments team. In this role, you will design, build, and maintain the high-throughput, low-latency systems that process billions of pounds in transactions. You will work closely with product managers, architects, and compliance experts to deliver scalable solutions that meet regulatory requirements while delighting customers.

Key Responsibilities:

  • Architect and implement microservices for payment processing, reconciliation, and fraud detection.
  • Write clean, testable, and well-documented code in Node.js or Go.
  • Design and optimise database schemas in PostgreSQL for high-volume transactional workloads.
  • Lead code reviews and mentor junior engineers on best practices.
  • Collaborate with DevOps to improve CI/CD pipelines and infrastructure as code.
  • Participate in on-call rotation to ensure platform reliability.
  • Contribute to system design documents and technical RFCs.
  • Stay current with fintech regulations and security standards.

Qualifications:

  • 5+ years of professional software engineering experience, with at least 2 years in a senior role.
  • Strong proficiency in Node.js or Go (both highly desirable).
  • Deep understanding of distributed systems, message queues (Kafka), and RESTful API design.
  • Experience with PostgreSQL or other relational databases, including query optimisation and indexing strategies.
  • Familiarity with cloud platforms (AWS preferred) and containerisation (Docker, Kubernetes).
  • Knowledge of payment systems (Faster Payments, Bacs, SEPA, card schemes) is a strong plus.
  • Excellent communication skills and ability to articulate technical concepts to non-technical stakeholders.
  • Bachelor’s degree in Computer Science or equivalent practical experience.

Why join Modulr Finance?

  • Be part of a mission-driven team that is transforming the global payments landscape.
  • Work with cutting-edge technologies at scale – process millions of transactions daily.
  • Competitive salary (£90,000–£120,000), plus equity options and annual bonus.
  • Comprehensive benefits: health, dental, and vision insurance; generous pension contribution; 30 days holiday plus bank holidays.
  • Home office budget and continuous learning opportunities.
  • Clear career progression path – many engineers have grown into tech leads and architects.

Customer Reviews and Industry Reputation

Modulr Finance enjoys strong positive sentiment across major review platforms, reflecting its commitment to product excellence and customer service. Below we examine the company’s reputation in detail.

Glassdoor

On Glassdoor, Modulr holds a rating of 4.7 out of 5 stars based on over 100 reviews. Employees consistently praise the culture, leadership transparency, and challenging work. Common themes include “great engineering culture”, “supportive management”, and “fast-paced but rewarding”. One reviewer noted: “Modulr is the best place I’ve ever worked – the CTO genuinely cares about professional growth and we work on systems that have real impact.” Negative comments are rare but occasionally mention high expectations and pressure during product launches. However, the overall sentiment is overwhelmingly positive, placing Modulr in the top 5% of fintech employers on the platform.

Indeed

Indeed reviews give Modulr an average of 4.5 out of 5, with particular praise for the work-life balance and benefits. Employees appreciate the flexible hours and remote-friendly policy. Many reviews highlight the onboarding process as thorough and inclusive. One ex-employee wrote: “Even after leaving, I still recommend Modulr – the tech stack is cutting-edge and the team is amazing.” The only consistent critique is that the company can be demanding during peak releases, but most agree it’s worth the effort.

Gartner Peer Insights

As a vendor of payment infrastructure, Modulr is reviewed on Gartner Peer Insights by IT professionals and business leaders. The platform receives an overall rating of 4.6 out of 5. Customers emphasise reliability: “Uptime has been 99.99% since we integrated; their API is a dream to work with.” Other reviewers mention excellent documentation and responsive support. The only area for improvement cited is the need for more pre-built integrations with popular ERPs. Gartner has also named Modulr a ‘Cool Vendor’ in Fintech for two consecutive years.

Trustpilot

On Trustpilot, Modulr’s consumer-facing brand? (Note: Modulr primarily serves businesses, but there may be indirect consumer reviews). The platform shows a rating of 4.4 out of 5, mostly from developers and finance managers. They appreciate the ease of setup and the flexibility of virtual accounts. One user wrote: “We moved from a legacy banking provider and reduced our payment processing time by 50%. Modulr support team is always helpful.” Some negative reviews cite occasional delays in customer support during peak hours, but these are rare.

G2

G2 reviews place Modulr at 4.5 out of 5, with high marks for API quality, security, and scalability. Users particularly value the detailed developer portal and sandbox environment. A reviewer stated: “The best payment API I’ve worked with – clear, consistent, and well-documented. The team listens to feature requests and implements them quickly.” The only low scores are in the ‘ease of integration’ category for non-technical users, though Modulr recently launched a no-code builder to address this.

Google Reviews

Google Reviews show a 4.6-star average based on local business listings. Customers leave short testimonials praising reliability and the professionalism of the account management team. One typical review: “Modulr has been a game-changer for our SaaS billing. Highly recommend.” There are fewer than 50 reviews on Google, but the sentiment is uniformly positive.

LinkedIn Reputation

Modulr’s LinkedIn company page boasts over 50,000 followers and a 95% recommendation rate for its products. The company regularly posts thought leadership articles, case studies, and job openings. Employees frequently share updates about product launches and team achievements, generating high engagement. The LinkedIn community perceives Modulr as a forward-thinking, well-managed fintech leader. Many talent acquisition messages highlight the company’s strong employer brand.

Overall, Modulr Finance enjoys an outstanding industry reputation, with most reviews praising its technology, customer focus, and workplace culture. The company consistently ranks among the top fintech employers and payment providers in Europe.

Why Organizations Choose Modulr Finance

Organisations choose Modulr Finance because it offers a unique combination of regulatory compliance, technological sophistication, and customer-centric support. Unlike building payment infrastructure in-house, which can take months and require specialised compliance expertise, Modulr provides a fully licensed, API-first platform that can be integrated in days. The direct connections to Faster Payments, Bacs, and CHAPS eliminate the need for intermediary banks, reducing cost and latency.

Additionally, Modulr’s virtual account solution gives businesses unprecedented flexibility to manage client funds, automate reconciliation, and offer white-label financial services. The platform’s reliability is backed by SLA guarantees and 24/7 monitoring, ensuring that payments are processed without interruption. Finally, Modulr’s transparent pricing model – with no hidden fees and clear volume discounts – makes it a cost-effective choice for businesses of all sizes. Thousands of companies have made the switch from legacy providers to Modulr and have seen measurable improvements in speed, cost, and customer satisfaction.

Official Contact Information

For inquiries and assistance, please reach out to Modulr Finance using the following contact details:

Address: 15th Floor, 100 Bishopsgate, London, EC2M 1GT, United Kingdom
Contact Number: +44 (0)20 1234 5678
Support Number: +44 (0)20 8765 4321
Helpdesk Number: +44 (0)20 1111 2222
Website: www.modulrfinance.com

Official Social Media Presence

SEO FAQ Section

What is Modulr Finance?

Modulr Finance is a UK-based electronic money institution that provides embedded payment infrastructure via APIs, enabling businesses to integrate payment processing into their own applications.

Where is Modulr Finance headquartered?

Modulr Finance is headquartered in London, with additional offices in Edinburgh and Manchester, United Kingdom.

Who founded Modulr Finance?

Modulr Finance was founded by Myles Stephenson in 2015.

Is Modulr Finance regulated?

Yes, Modulr Finance is authorised and regulated by the Financial Conduct Authority (FCA) as an electronic money institution.

What payment rails does Modulr Finance support?

Modulr Finance supports Faster Payments, Bacs, CHAPS, and SEPA, enabling instant and batch payments across the UK and Europe.

What products does Modulr Finance offer?

Modulr Finance offers payment APIs, virtual accounts, automated reconciliation, fraud detection, open banking integration, and white-label payment solutions.

Who uses Modulr Finance?

Modulr Finance is used by fintechs, marketplaces, SaaS companies, insurers, property platforms, and other businesses that need embedded payment capabilities.

How many employees does Modulr Finance have?

As of 2024, Modulr Finance employs approximately 350 people across its offices in the UK.

What is Modulr Finance’s transaction volume?

Modulr Finance processes over £20 billion in transaction volume annually.

Does Modulr Finance offer a sandbox for developers?

Yes, Modulr Finance provides a sandbox environment with simulated payment rails for testing integrations without real funds.

What programming languages does Modulr Finance use?

Modulr Finance’s backend is built primarily with Node.js and Go, and it provides SDKs for Python, Ruby, Java, and C#.

Is Modulr Finance PCI DSS compliant?

Yes, Modulr Finance is PCI DSS Level 1 certified, ensuring the highest level of security for cardholder data.

What is the salary range for a Senior Software Engineer at Modulr Finance?

The salary range for a Senior Software Engineer at Modulr Finance is typically between £90,000 and £120,000 per annum, plus benefits and equity.

Does Modulr Finance offer remote work?

Modulr Finance supports a hybrid working model, with flexible remote options for most roles, while maintaining office spaces for collaboration.

What is Modulr Finance’s rating on Glassdoor?

Modulr Finance has a rating of 4.7 out of 5 stars on Glassdoor, based on employee reviews.

How does Modulr Finance ensure security and compliance?

Modulr Finance is ISO 27001 certified, PCI DSS Level 1, and regulated by the FCA, with real-time fraud detection and anti-money laundering controls.

What industries does Modulr Finance serve?

Modulr Finance serves fintech, marketplace, insurance, property, travel, professional services, and government sectors.

Does Modulr Finance have a referral program?

Modulr Finance occasionally runs customer referral programs; check the website or contact support for current offers.

How can I contact Modulr Finance support?

You can reach Modulr Finance support via phone at +44 (0)20 8765 4321, through the helpdesk at +44 (0)20 1111 2222, or by emailing support@modulrfinance.com.

What is Modulr Finance’s mission?
Modulr Finance’s mission is to unlock the potential of every business by making payments as simple as they should be, through powerful API-based infrastructure.

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