Back-End Software Engineer

About VFX

VFX is a fast-growing FinTech simplifying global trading and cash management for businesses worldwide. We remove complexity so clients can transact globally with confidence. Our tailored, secure, and efficient solutions span FX and international payments, multi-currency accounts, and integrations that make global operations effortless.

With six offices, five regulatory licences, and an 83% CAGR over the past three years, we’re scaling fast and earning industry recognition along the way - including CNBC UK's Top Fintech Companies for 2025, Wealth & Finance FinTech Awards 2025, and the Business Growth Award from Business Awards UK. Behind it all is a team of ambitious VFXers who think like founders, never stop learning, and go the extra mile to help our clients succeed.

About the Role

We’re seeking a detail-driven and highly capable Back-End Software Engineer to join our engineering team and contribute to the core systems powering VFX’s global financial infrastructure. You will work across complex, high-value domains including multi-currency account architecture, payment routing, treasury operations, risk management, compliance workflows, and API-driven client integrations.

This role is suited to someone who brings discipline, precision, and a strong engineering mindset. You will thrive if you enjoy building resilient, scalable and secure systems that serve sophisticated clients operating across multiple jurisdictions and regulatory environments. This is an opportunity to deepen your expertise within a regulated FinTech while making a tangible impact across a platform used by global businesses.

This role can be hybrid at our office in Portimao or fully remote across Portugal.

Key Responsibilities

• Collaborate with engineering, product, operational SMEs, and wider stakeholders to translate complex requirements into robust technical solutions.

• Architect, implement, and rigorously test high-quality .NET applications with a focus on performance, reliability, and scalability.

• Produce clean, maintainable, and well-documented code aligned with VFX engineering standards.

• Proactively identify and remediate defects through detailed root-cause analysis.

• Maintain and enhance existing applications, ensuring resilience and operational efficiency across our .NET ecosystem.

• Conduct peer code reviews to ensure quality, maintainability, and adherence to engineering best practices.

• Create comprehensive technical documentation to support future development, onboarding, and architectural clarity.

• Remain current with emerging .NET technologies and best practices, implementing improvements that strengthen the competitiveness and robustness of our platform.

• Embed security principles directly into the codebase, addressing risks proactively.

• Partner with QA teams on test planning and execution to uphold VFX’s high software quality standards.

• Actively participate in Agile ceremonies, contributing to predictable delivery, improved collaboration, and continuous improvement across sprints.

Key Challenges

• Building and maintaining enterprise-grade backend systems within a regulated financial environment.

• Translating complex financial concepts — payments, FX, reconciliation, treasury workflows —into robust engineering solutions.

• Balancing speed, innovation, and long-term stability across critical systems.

• Managing competing priorities across stakeholders, systems, and domain areas.

• Ensuring scalability, security, and operational consistency in a rapidly evolving environment.

Candidate Profile

• Demonstrates technical rigor, attention to detail, and ownership of outcomes.

• Able to operate with clarity in complex environments, navigating ambiguity with composure.

• Communicates confidently across technical and non-technical audiences.

• Thrives in agile, iterative delivery environments, contributing proactively to team performance.

• Approaches engineering with discipline and pride, ensuring solutions are secure, reliable, and future-proof.

• Works effectively both independently and within a high-performing team.

Preferred Background

• 3–5 years of hands-on experience in .NET development, delivering scalable, production-grade applications.

• Strong proficiency in DDD, CQRS, and clean architecture with practical application in prior projects.

• Solid experience designing and consuming RESTful APIs and integration layers.

• Proficient in unit testing frameworks (NUnit, xUnit) and mocking tools (NSubstitute, Moq).

• Strong SQL Server or relational database experience, including schema design and performance optimization.

• Skilled in Git-based version control workflows, including branching strategies and code review processes.

• Excellent written and verbal communication skills.

• Experience in fast-paced, agile engineering environments.

Preferred Skills:

• Experience building and maintaining DevOps pipelines, ideally using GitHub Actions.

• Exposure to messaging technologies such as Azure Service Bus or gRPC.

• Previous experience in the financial sector and familiarity with industry-specific constraints.

• Practical use of tools like Jira within Agile delivery frameworks.

Success Measures

• Delivery of secure, high-quality, high-performance .NET features that support business and client objectives.

• A maintainable, well-structured codebase aligned with VFX’s architectural standards.

• Positive feedback from engineering peers, testers, product owners, and operational stakeholders.

• Reduced defects, improved stability, and enhanced system performance.

• Demonstrable contribution to sprint predictability, velocity, and cross-team alignment.

• Strict adherence to regulatory, security, and operational standards.

Benefits at VFX

We offer more than just perks — we offer ownership.

Our benefits include:

• Generous Profit Share Plan (PSP)

• Equity via the Company Share Option Plan (CSOP)

• Competitive salary

• Annual all-expenses paid company incentive trip abroad

• Flexible learning & development budget

PSP & CSOP Details

At VFX, the biggest benefit is the opportunity to act like an owner. Through our Profit Share Scheme (PSP) and Company Share Option Plan (CSOP), every team member has a chance to own a stake in the business and share in the profits.

To show you what that looks like, in 2024, PSP participants received over $1,000,000 USD. From those distributions, more than 80% of eligible VFXers chose to become shareholders — a powerful reflection of the belief and commitment that drives VFX forward.

If you care about building something meaningful, take pride in your work, and are motivated by impact — you’ll thrive here.

Next Steps

If you are successful, you will be contacted for an initial call with the People Ops Team, followed by a test and virtual technical interview.