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

Bonsai Smart Wealth; London; Remote; GBP 70,000 - 85,000; Full time

Job summary

Join a dynamic fintech startup as a Senior Full Stack Developer. Contribute to building complex financial solutions using your expertise in Django and React Native, in a remote role that demands autonomy and delivers meaningful results. Enjoy a high-standard culture without micromanagement, and be part of a team that trusts you to achieve excellence.

Benefits

Equity upside potential

No micromanagement culture

Fast-paced work environment

Qualifications

• 7+ years of software engineering experience across multiple domains.
• Deep experience with Django and React Native, specifically with Expo.
• Ability to operate with urgency and autonomy.

Responsibilities

• Leading full-cycle development of core features using Django and React Native.
• Building secure, scalable, and modular systems for financial products.
• Making architectural decisions balancing performance, maintainability, and security.

Skills

Django

React Native

RESTful APIs

State Management

CI/CD

System Design

Job description

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

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

1 day ago Be among the first 25 applicants

Job Title: Senior Full Stack Developer (Django + React Native / Expo)Location: Remote (UK timezone 4 hours +/- overlap required)Type: Full-TimeExperience: 7+ yearsIndustry: Fintech / SaaSWho 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 startup.

Application Process

If this sounds like your kind of role, 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

[e-mail]

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Contract

Job function

• Job function

  Engineering and Information Technology

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