Senior Full Stack Engineer

BondAval Ltd; City of London; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A financial technology company in London is seeking a Senior Engineer to join their technical team. The ideal candidate has over 4 years of experience in software engineering and expertise in languages like Go or Python. Responsibilities include engaging in technical decisions, collaborating across teams, and contributing to innovative projects. The company offers a hybrid work environment, private healthcare, and opportunities for career development.

Benefits

Private healthcare

25 days’ holiday

Bike to work scheme

Electric vehicle car scheme

Private pension

£100/year towards physical challenge

Learning and development support

Qualifications

• 4+ years of software engineering experience.
• Expert-level ability in a server-side language such as Go, Python or Java.
• Strong relational database knowledge, including schema design and optimisation.
• Some front-end experience with frameworks such as VueJS, React or Angular.
• Excellent communication and collaboration skills.

Responsibilities

• Engage in technical decisions and contribute to the codebase.
• Collaborate across disciplines to design and deliver high-impact features.
• Play a key role in shaping ideas from concept to production.

Skills

Server-side programming in Go, Python or Java

Database schema design and optimization

Source control with Git/GitHub

CI/CD practices

Strong communication and collaboration skills

Curiosity about AI tools

Education

Degree in Computer Science or related field

Tools

VueJS

AWS

NoSQL databases (MongoDB, Cassandra, Redis)

Job description

Overview

We look for character over credentials:

• We’re a specialist financial technology company transforming B2B credit (website)

• We’re backed by top European and American VCs including Dawn Capital, Octopus Ventures, Talis and Expa

• Founded in 2020, we are licensed and operating across the UK, Europe, US and Canada with offices in London, New York and Dallas

• Since our commercial launch in March 2022, we are already serving some of the world’s largest companies, providing them with superior credit protection and innovative risk management technology

About the role

We’re looking for a Senior Engineer with great general skills to join our first-class technical team. An ideal candidate thrives on solving complex problems and is eager to shape how we build and apply AI and large language models within our products.

You’ll be deeply involved in technical decisions, architecture and best practices, while contributing directly to the codebase. Beyond core programming skills, we value interest or experience in data, security or DevOps that help raise the bar across the team.

Above all, we’re looking for a positive, collaborative individual – confident in their skills, focused on outcomes and able to challenge ideas constructively. Someone who balances productivity with continuous learning and improvement and who’s willing to both teach and learn from others.

You will report directly to our CTO, Yoel Marson. You’ll work closely with our Tech Leads, product managers and data teams, collaborating across disciplines to design and deliver high-impact features. You’ll play a key role in shaping how ideas move from concept to production — contributing to architecture, product direction and data-driven decision-making while expanding your technical breadth and leadership influence.

This is a fantastic opportunity to join one of the most exciting financial technology companies, with the chance to grow and develop alongside the business.

Our approach to Engineering

We follow an Agile development methodology - but unlike others, we use a flexible variant of Scrum across the entire organisation, including executive tasks and decisions.

Our multidisciplinary team offers flexibility for individuals to move between core engineering, infrastructure, testing and research.

Our stack includes Go, VueJS, Postgres and Python, deployed through a fully automated AWS environment (Terraform, Ansible, GitHub Actions). Alongside this, we’re building the next generation of our data and AI infrastructure — exploring frameworks like Hugging Face, LangChain, LlamaIndex and agent orchestration systems.

We use Cursor and Copilot to speed iteration and experimentation. We’re always open to new approaches, whether it’s a different data stack, AI toolkit, or a creative way to apply LLMs in production.

You might be a good fit if

• 4+ years of software engineering experience.
• Expert-level ability in a server-side language such as Go, Python or Java.
• Solid experience across multiple areas of the stack — front end and back end.
• Strong relational database knowledge, including schema design and optimisation.
• Proficient with source control (Git/GitHub) and modern CI/CD practices.
• Strong architectural and systems-design skills.
• Some front-end experience with frameworks such as VueJS, React or Angular.
• Degree in Computer Science or related field (optional).
• Excellent communication and collaboration skills.
• Curiosity about AI tools and frameworks, and interest in how LLMs can improve developer productivity, automation, or decision systems.

Nice to haves

• Experience with NoSQL databases (MongoDB, Cassandra, Redis).
• Familiarity with message brokers (Kafka, SQS/SNS, RabbitMQ).
• Knowledge of real-time streaming (Kafka Streams, Apache Flink, etc.).
• Exposure to big-data or machine-learning frameworks (TensorFlow, PyTorch, Hugging Face, LangChain).
• Experience working with AI-driven development tools such as Cursor, Copilot, or Replit Ghostwriter.
• Understanding of infrastructure and DevOps (Terraform, Ansible, AWS, Kubernetes).
• Interest in building or orchestrating AI/LLM agents.
• A passion for software security and data integrity.

Logistics

• Compensation: Based on experience
• Employment type: Permanent
• Employee share option pool: Available - you will earn a stake in the company you are helping to build
• Location: Hybrid (office on Bermondsey Street, 5-minute walk from London Bridge Station)

Company benefits

• Private healthcare
• 25 days’ holiday
• Bike to work scheme
• Electric vehicle car scheme
• Private pension
• £100/year towards physical challenge of choice
• Learning and development support