Senior Software Engineer – Backend

Apron

Senior Software Engineer developing backend solutions for fintech startup. Working on systems design and financial integrations in a fast-paced environment.

Posted 5/4/2026full-timeLondon • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

CloudGoogle Cloud PlatformKotlinKubernetesPostgresTerraform

About the role

Key responsibilities & impact

You'll work cross-functionally with Frontend Engineers, Product Managers and Product Designers to develop new products and features.
You’ll design systems and develop core financial integrations to guarantee customer funds are secure and transactions are routed with market-leading speed.
You’ll share your experience with others, driving innovation, proactively suggesting improvements.

Requirements

What you’ll need

6-15 years of continuous experience as a backend engineer or Backend-leaning fullstack
Experience working in a product-led + fast-paced environment (startup or tech company).
Experience with relational databases.
Working knowledge of cloud platforms, with preference for Google Cloud Platform.
Keen attention to code quality, passion for efficient architecture, and commitment to optimising performance.
We use Kotlin for server-side development. While Kotlin proficiency is not mandatory, readiness to work with it is essential.
Would be a highlight if you:
Are proficient in Kotlin, for server-side development.
Have hands-on experience with Kubernetes and Terraform.
Have experience with advanced Postgres features like GIST indexes, partitioning and replication.

Benefits

Comp & perks

💷 Highly competitive salary + meaningful stock options
📈 Pension plan with Nest
🏥 Health insurance (including Optical and Dental cover), Life Assurance
🚼 Enhanced parental leave
🥗 Weekly Deliveroo allowance
🌴 29 days of holidays (on top of Bank holidays)
☕ Flexible working hours
📍 Hybrid work 3 days a week in our London (Liverpool Street) offices.
🚲 Cycle to Work scheme, Electric vehicle scheme
🌍 Visa sponsorship (if applicable)

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Hard Skills & Tools

backend engineeringfullstack developmentrelational databasesKotlinKubernetesTerraformPostgresGIST indexespartitioningreplication

Soft Skills

cross-functional collaborationinnovationproactive improvementattention to code qualityefficient architectureoptimising performance