Senior Full Stack Developer (Django + React Native / Expo)

JR United Kingdom; Sheffield; Remote; GBP 60,000 - 80,000; Full time

Job summary

A leading company in the fintech space is seeking a Senior Full Stack Developer experienced with Django and React Native to join their team. This role will involve leading development efforts for core financial systems, requiring deep technical skills and the ability to thrive in a fast-paced environment. The ideal candidate will work autonomously, contributing to both the backend and frontend, while balancing performance and security needs of impactful financial products.

Qualifications

• 7+ years of experience as a software engineer, ideally across multiple domains.
• Strong experience with Django (including DRF, Celery).
• Solid experience with React Native, specifically with Expo-managed workflows.

Responsibilities

• Leading full-cycle development of core features using Django and React Native.
• Building secure, scalable, and modular systems for financial products.
• Collaborating closely with product, design, and engineering leadership.

Skills

Django

React Native

RESTful APIs

CI/CD

PostgreSQL

System Design

Performance Optimization

Job description

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Senior Full Stack Developer (Django + React Native / Expo), sheffield, south yorkshire

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Client:

Bonsai Smart Wealth

Location:

sheffield, south yorkshire, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

2

Posted:

04.06.2025

Expiry Date:

19.07.2025

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Job Description:

Job Title: Senior Full Stack Developer (Django + React Native / Expo)

Location: Remote (UK timezone 4 hours +/- overlap required)

1) Describe a production system you’ve built using Django and React Native (Expo)

2) In Django, how have you handled long-running tasks or async workflows?

2) How do you approach state management in React Native when dealing with complex data interactions and API syncing?

3) What would your CI/CD pipeline look like for a full stack Django + Expo app?

Who We’re Looking For

We’re hiring ahighly self-managed Full Stack Developerwith deep experience inDjangoandReact Native (Expo). You’ll be joining a small, fast-moving team building complex, high-performance systems in the fintech space. This is not a role for someone who needs hand-holding or detailed specs - it’s for someone who thrives under pressure, works independently, and consistently delivers exceptional results.

What You’ll Be Doing

• Leading full-cycle development of core features using Django on the backend and React Native with Expo on the frontend.
• Building secure, scalable, and modular systems for financial products.
• Collaborating closely with product, design, and engineering leadership to ship meaningful features quickly.
• Making architectural decisions that balance performance, maintainability, and security.
• Writing clean, testable, well-documented code and reviewing PRs with a high bar for quality.
• Operating effectively in ahigh-expectation, low-oversightenvironment. You’ll own your time and output.

Must-Have Skills

• 7+ years of experienceas a software engineer, ideally across multiple domains.
• Strong experience with Django(including DRF, Celery, and PostgreSQL).
• Solid experience with React Native, specifically withExpo-managed workflows.
• Proficient with RESTful APIs, authentication flows, and state management on mobile.
• Comfort with CI/CD pipelines, testing, and deployment best practices.
• Strong understanding of data models, performance optimization, and system design.
• Ability to operate with urgency and autonomy. You deliver without waiting to be told what to do.

Bonus Points

• Prior experience infintech or regulated environments.
• Exposure to financial data APIs (GoCardless, Plaid, TrueLayer, Stripe, etc).
• Experience with Firebase, background jobs, or push notification systems.
• Knowledge of secure coding practices and data protection standards (GDPR, PCI).

Why Join Us

• Work on something that actually matters - real problems, real users, real financial impact.
• No micromanagement. We trust you to get the job done.
• Fast-paced, high-standard culture with zero tolerance for mediocrity.
• Equity upside potential in a rapidly scaling start-up.

Application Process

If this sounds like your kind of role and you're excited to , don’t send a fluffy cover letter. Send us:

• Your GitHub or portfolio (we like code more than resumes)
• A short note on the most ambitious product or system you’ve shipped
• This will be a contract position for 6 months, targeting 30-40 hours per week (flexible). The rate will be £1,500-£2,000 per calendar month, depending on hours and experience.