Job Description

Senior Software Engineer (C# .NET)

---------------------------------------

Payments & Financial Infrastructure (Remote)

A fast-scaling global payments infrastructure company is building the

financial rails that move real money across borders

at speed, at scale, and with zero tolerance for failure.


The platform powers cross-border transactions for SMEs and enterprises using a blend of

traditional banking networks and stablecoin-backed blockchain rails

. Transaction sizes are meaningful. The systems are live. The consequences are real.


The engineering team is

distributed, lean, and fast-moving

. Decisions are made quickly. Priorities shift. External partners change things without warning. The expectation is simple:

build systems that hold up in the real world

.


This is not a "feature factory" role.


This is

financial infrastructure

.


They are now hiring a

Senior Software Engineer (C# .NET)

to play a key role in shaping and stabilising their backend payments platform.

The Role (What You're Really Signing Up For)

------------------------------------------------

As a Senior Software Engineer, you'll own and evolve critical backend services that sit directly in the path of money movement.


You'll:


Design and build API-driven services that process real payments Integrate with banks, payment providers, identity platforms, and blockchain rails Balance

speed vs safety

, often with incomplete information Take responsibility when things go wrong not just when they go right
This role suits someone who has

already worked in regulated, high-risk systems

and understands that elegance matters less than reliability.

What You'll Be Doing

------------------------

Backend & API Engineering

Design and build secure, scalable APIs in

.NET 8 / C#,

powering payment and stablecoin transactions Own backend services end-to-end -- from design through production support Build background processing, scheduled jobs, and webhook-driven workflows Integrate with third-party payment, banking, KYC and identity providers

Payments, Crypto & Real-World Complexity

Implement logic that touches

real money

, not test data Build and maintain integrations across traditional rails and blockchain-backed stablecoin flows Create mock services and defensive layers for partners without stable test environments Design systems that expect breaking changes outside your control

Security, Risk & Compliance (By Design)

Implement secure API patterns: authentication, encryption, auditing and monitoring Treat financial data with the caution it deserves Build systems that work within regulatory and compliance constraints rather than fighting them

Cloud, Infrastructure & Reliability

Deploy and operate services on

AWS

(Lambda, EC2, DynamoDB, S3) Collaborate closely with DevOps on CI/CD pipelines (GitHub Actions) Build containerised services (Docker) designed for scalability and resilience Monitor production systems using tools like

DataDog

, catching issues early

Team & Ways of Working

Work closely with product and engineering to convert evolving requirements into stable systems Review code, raise the bar, and challenge risky assumptions Be comfortable with context-switching between BAU stabilisation and new feature work Communicate clearly in a fully remote, distributed team

The Technical Stack

-----------------------

Backend:

.NET 8, C#, EF Core, Hangfire, RestEase, NUnit

Data:

PostgreSQL, DynamoDB

Infrastructure:

AWS, Docker, GitHub Actions

Auth & Observability:

Auth0, DataDog

Domain:

Payments, identity verification, banking partners, stablecoin rails

Who This Role Is

Really

For

-----------------------------------------

You'll Likely Thrive If You:

Have

5+ years

of building production backend systems in

C# .NET

Have worked in

fintech, banking, payments, or regulated environments

Understand that money is

risk

, not just data Are calm under pressure and methodical when things break Can operate without perfect specs or stable third parties Take ownership instead of waiting for instructions Prefer reliability and clarity over shiny greenfield builds

This Role Is Probably

Not

for You If You:

Need everything fully specified before you start Prefer slow, linear delivery cycles Avoid BAU, optimisation, or legacy improvement work Get frustrated by external dependencies you don't control Are uncomfortable dealing with production responsibility
(Both kinds of engineers are good -- just not for this role.)

Nice-to-Haves (Not Deal Breakers)

---------------------------------------

Experience with blockchain or stablecoin-based payment flows Hands-on use of DataDog for logs, metrics, and alerting Familiarity with Auth0 or similar auth providers Experience building integration-heavy systems with multiple external APIs Exposure to financial compliance or regulated domains

What Makes This Worthwhile

------------------------------

Real ownership:

You'll work on systems that matter, not internal tooling nobody uses

High impact:

Your decisions directly affect real-world payments and customers

Fast growth:

Early-stage scale means fast learning and expanding responsibility

Distributed team:

Remote-first, pragmatic, outcome-focused

Meaningful work:

You're enabling faster, more accessible financial infrastructure globally

Final Note

This environment rewards engineers who are:


Thoughtful Cautious Accountable Comfortable with ambiguity
It is not about being the loudest or fastest,





It's about

building systems that don't break when it matters most

.