Senior Back-end Engineer

Heart Mind Talent; Greater London; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A dynamic fintech company in Greater London is seeking a Senior Backend Engineer to enhance their payment management platform. This role requires over 6 years of backend engineering experience, ideally with JVM-based languages and cloud platforms. Responsibilities include collaborating with cross-functional teams, designing secure financial integrations, and driving innovation. The company offers a competitive salary, stock options, health insurance, and flexible working hours, making it an attractive opportunity for seasoned engineers.

Benefits

Highly competitive salary

Stock options

Pension plan (matched up to 5%)

Private health insurance

Life assurance

Enhanced parental leave

Weekly meal allowance

29 days annual leave

Flexible working hours

Cycle to Work scheme

Electric vehicle scheme

Opportunity to work and travel for up to six weeks per year

Visa sponsorship (if applicable)

Qualifications

• 6+ years of continuous experience as a backend engineer.
• Proficiency in JVM-based languages; willingness to work with Kotlin.
• Experience in a product-driven environment, such as a startup.

Responsibilities

• Collaborate with product, frontend, and design teams to develop new features.
• Design and build financial integrations ensuring transaction security and efficiency.
• Drive innovation and suggest improvements within the team.

Skills

Backend engineering

JVM-based languages

Relational databases

Cloud platforms

Code quality

Tools

Kubernetes

Terraform

Google Cloud Platform

Job description

About the Company

We are working with an exciting Series B company that is committed to empowering small and medium-sized businesses, helping them maintaining healthy cash flow, often complicated by the complexities of payment management.

They address this by digitising and streamlining payments—from invoice capture and issuing expense cards to managing receivables and payables—all within a single platform.

It is a rapidly growing team of around 100 people that operates across multiple countries, backed by leading investors,

About Our Engineering Culture

Engineers are central to our mission. Here’s what defines our approach:

• Customer-first focus: We leverage top-tier technology to create solutions that genuinely make users’ lives easier.

• Ownership: We plan, break down, and deliver our work end-to-end.

• Embracing complexity: Navigating the intricate logic of finance requires care, attention to detail, and a passion for problem-solving.

• Code quality: We prioritise writing code that is robust, performant, and future-ready.

• AI integration: We utilise advanced tools to enhance our product and streamline processes.

What You’ll Do

As a Senior Backend Engineer on our team, you will:

• Collaborate cross-functionally with product, frontend, and design teams to develop new features.

• Design and build core financial integrations that ensure the security and efficiency of customer transactions.

• Share knowledge with your peers, drive innovation, and proactively suggest improvements.

What We’re Looking For

• 6+ years of continuous experience as a backend engineer.

• Ideal proficiency in JVM-based languages (consideration for others possible).

• Experience in a product-driven, fast-paced environment (e.g., startup or tech company).

• Willingness to work with Kotlin (current server-side language).

• Experience with relational databases.

• Working knowledge of cloud platforms, preferably Google Cloud Platform.

• Strong commitment to code quality, efficient architecture, and performance optimisation.

Bonus Points

• Advanced knowledge of JVM-based languages, particularly Kotlin.

• Experience with Kubernetes and Terraform.

• Familiarity with advanced Postgres features such as GIST indexes, partitioning, and replication.

What We Offer

• Highly competitive salary

• Stock options

• Pension plan (matched up to 5%)

• Private health insurance (including optical and dental cover)

• Life assurance

• Enhanced parental leave

• Weekly meal allowance

• 29 days annual leave (in addition to bank holidays)

• Flexible working hours

• Cycle to Work scheme

• Electric vehicle scheme

• Opportunity to work and travel for up to six weeks per year

• Visa sponsorship (if applicable)