Backend Developer

Earnly Limited; Manchester; Remote; GBP 100,000 - 125,000; Full time

Job summary

A FinTech startup is seeking a talented backend developer to create the core infrastructure for their platform. The role involves designing APIs, managing databases, and developing data pipelines. Qualified candidates will have 3+ years in backend development, proficiency in .Net, and experience with MongoDB. This is an unpaid position with equity potential in a fast-moving startup environment, offering remote flexibility and a chance to shape the future of financial technology.

Benefits

Equity within the business

Remote & flexible working environment

Training and development budget

Qualifications

• 3+ years of experience in backend development in a startup or SaaS environment.
• Proficient in .Net, Core 8, Razor Pages, and Bootstrap 5.
• Experience with MongoDB and SQL Server, including schema design and indexing.
• Familiarity with Azure and containerization tools.
• Strong understanding of API design, security, and GDPR compliance.

Responsibilities

• Build and maintain robust RESTful APIs for mobile and web clients.
• Design and manage databases for user financial data.
• Develop data ingestion pipelines for real-time and batch data.
• Optimize backend performance for scalability and resilience.
• Implement authentication and authorization flows following security best practices.
• Collaborate in agile development cycles with cross-functional teams.

Skills

.Net

Core 8

Razor Pages

Bootstrap 5

MongoDB

SQL Server

Azure

Docker

API design

Git

Tools

Docker Compose

CI/CD

Job description

About Us

Earnly is a FinTech startup on a mission to simplify financial management and empower individuals and businesses with real-time clarity on their money. We re developing a new platform that makes financial insights accessible, transparent, and stress-free. As an early member of our team, you ll have the opportunity to directly shape the product, culture, and future of the company.

About You

You thrive in dynamic environments where no two days are the same, motivated by big goals and the satisfaction of building something meaningful from the ground up. Startups bring tight deadlines, shifting priorities, and lean resources, but you embrace the challenge, staying focused under pressure, taking ownership, adapting quickly, and pitching in wherever needed.

The Role

We re looking for talented backend developer with proven commercial experience to help us build the core infrastructure that shall power our entire platform. You ll be responsible for designing, developing, and maintaining secure, scalable APIs, data processing pipelines, and backend integrations with third-party services like Stripe, PayPal, and Open Banking providers.

Key Responsibilities:

• Build and maintain robust RESTful APIs for mobile and web clients.
• Design and manage databases built in MongoDB and SQL Server to store, query, and aggregate user financial data.
• Develop data ingestion pipelines to process real-time and batch data from external services.
• Optimize backend performance and ensure application scalability and resilience.
• Build authentication and authorization flows, following best practices for fintech-grade security.
• Write unit and integration tests, participate in code reviews, and contribute to continuous improvement.
• Collaborate closely with frontend/mobile engineers, product managers, and founders in agile development cycles.
• Contribute to infrastructure decisions (e.g. Docker, container orchestration, cloud services).

Skills & Experience You ll Need

• 3+ years experience in backend development (ideally in a startup or SaaS environment).
• Proficient in .Net, Core 8, Razor Pages and Bootstrap 5 for UI.
• Experience with databases such as MongoDB and SQL Server, including schema design, indexing, and performance tuning.
• Familiarity with cloud platforms like Azure (we use Azure).
• Experience with containerization tools (Docker, Docker Compose) and deployment pipelines.
• Strong understanding of API design, versioning, and security (OAuth, JWT, API tokens).
• Comfortable working with Git, agile methodologies, and CI/CD practices.
• A good understanding of data protection, GDPR, and fintech security requirements.

Nice to Have

• Exposure to event-driven architecture or message queues (e.g. Kafka).
• Experience integrating payment platforms like Stripe, PayPal, Plaid, or Open Banking.
• Exposure to Azure App Services.
• Knowledge of financial systems, accounting, or tax workflows.

What We Offer

This is an unpaid role; however, it provides a unique opportunity to join a fast-moving company that is committed to disrupting an outdated industry. While the position does not include a salary, it offers the potential to earn equity in the business, contingent upon meeting clearly defined milestones and deliverables.

• Equity within the business (granted after demonstrating ability and commitment)
• Remote & flexible working environment
• Training and development budget to support your growth
• The chance to join a FinTech startup at an early stage, where your input truly shapes the product and business

Requirements

• UK-based (remote OK), right to work in the UK.

Interested?

If you re excited about building cutting-edge financial technology and want to be part of a growing startup, we d love to hear from you. Click Apply Now!