Senior Frontend Engineer

Zilch is a payment tech company on a mission to create the most empowering way to pay for anything, anywhere. Combining the best of debit, credit and savings, we give our customers the option to earn instant cashback or spread the cost of pricier purchases, completely interest free and with no late fees.

Since 2018, we have grown from a small team to a double‑unicorn company with over 5 million customers, and we have exciting projects on the horizon as part of our big growth plans.

We are looking for an FE Software Engineer IV who brings full‑stack discipline, passion for software, and a track‑record of delivering high‑quality code. The ideal candidate sets the standard for others, drives technical innovation, and maintains the highest coding standards while working on Zilch’s Mobile App.

• Work in an agile environment with multiple team members on user stories that deliver significant impact for our customers.
• Lead the technical design and refinement of Mobile App improvements, including performance enhancements, memory optimisation, seamless animations, and complex 3rd‑party integrations.
• Build mobile components that are rock‑solid, secure, well‑tested, and highly performant.
• Continuously improve our code, systems, practices, and knowledge, leveraging experience gained throughout the career.
• Collaborate with APIs and back‑end components to ensure secure and effective data management.
• Improve the mobile developer experience internally and streamline app‑test and deployment processes.
• Assist in ad‑hoc development and technology‑related duties.

• 6 + years of overall software experience.
• 4 + years of Type Script development.
• 4 + years of React JS experience.
• 4 + years of developing iOS and Android React Native apps.
• Willingness to work on‑site in our London Victoria office 3 days per week.

• Exposure to other mobile development systems & languages.
• Bridging React Native to native code.
• Mobile testing frameworks such as Appium and Maestro.
• Contract testing frameworks such as Pact Flow.
• App deployment technology – Firebase, Code Push, Bitrise.
• Exposure to Styled Components.
• Experience with AWS & AWS Lambda.
• Experience with content‑management systems, especially Content Stack.

• Income protection.
• Share‑option scheme for permanent employees.
• 5 % back on in‑app purchases.
• £200 for home‑office setup.
• Private medical insurance.
• GP consultations (video, telephone or face‑to‑face).
• Prescribed medication.
• In‑patient, day‑patient and out‑patient care.
• Mental‑health support, physiotherapy, advanced cancer cover.
• Employee assistance programme (24/7 helpline, remote GP & physiotherapy, ongoing support).
• Savings & discounts on everyday shopping.
• 1:1 personalised well‑being consultations.

• Enhanced maternity pay.
• Enhanced paternity pay.
• Enhanced adoption pay.
• Enhanced shared parental leave.

• Professional qualifications and memberships.
• Learning suite for e‑courses.
• Internal training programmes.
• FCA & regulatory training.
• Hybrid working flexibility.
• Casual dress code, workplace socials.

Zilch Technology is an equal‑opportunities employer and encourages all qualified and eligible candidates regardless of sex, race, disability, age, sexual orientation, religion or belief to apply.