Backend Engineer, LegalTech

Meet Avanita

Avantia Law is redefining legal services through AI-powered innovation. Since our launch in 2019, we’ve experienced exceptional growth, helping top-tier investment funds and asset managers handle routine legal and compliance work faster and more cost-efficiently.

We are powered by AI but committed to our people.

We offer a culture of trust and flexibility to employees. We have an office in London for those wishing to spend some portion of their working time with colleagues, but employees are also welcome to work predominantly remotely. We have a truly diverse workforce, with members of staff coming from all corners of the world. There are around 100 of us at Avantia, so we’re small and friendly enough for you to get to know everyone and make an impact – but big enough to offer you great career prospects.

Who we are looking for 

We’re looking for a Backend Engineer to help us build and optimise AI-powered tools that integrate with internal web applications, MS Word, and MS Outlook. You’ll work closely with senior engineers, our CTO, and stakeholders to design, build, and maintain high-quality, production-ready solutions.

This role is ideal for someone with some experience in Python development and a basic understanding of AWS (or a strong desire to learn). If you’re excited about working on the backend of AI-driven applications and want to gain hands-on experience with cloud infrastructure, this is a great opportunity for you! 

If you are a motivated Backend Engineer with a passion for building and maintaining innovative solutions, we encourage you to apply. Join our team and contribute to the development of cutting-edge applications that drive our internal operations and future external projects.

What you will be doing

• Develop and maintain backend services for internal-facing web applications.
• Build APIs that power AI-driven document processing and workflow automation for the firm’s legal tools (KYC Compliance & Contracts)
• Translate user feedback and requirements into functional production solutions
• Work with AWS services (Lambda, OpenSearch, S3) to manage and optimize our infrastructure.
• Monitor and troubleshoot production systems, ensuring reliability and performance.

Requirements

• 1+ year work experience as a software engineer with knowledge of backend development (APIs, databases, web frameworks like Flask or FastAPI).
• Strong academic background (STEM degree preferred)
• Proficiency with Python
• Familiarity with (or interest in) AWS services (S3, Lambda, OpenSearch).
• Eagerness to learn about DevOps practices (CI/CD, infrastructure as code, cloud security).
• A problem-solving mindset and willingness to take on new challenges.
• Start-up experience would be advantageous but not essential - you should thrive in small teams and be willing to roll your sleeves up.

Recruitment process

Stage 1: Screening call with the Talent team

Stage 2: Take home technical exercise

Stage 3: Interview with VP of Engineering & Machine Learning

Stage 4: Final interview with CTO

EQUAL OPPORTUNITIES

At Avantia, we are committed to fostering an inclusive and diverse workplace, and we firmly believe in equal opportunities for all. We value and celebrate the unique perspectives, backgrounds, and experiences that each individual brings to our team. We embrace diversity in all its forms. We strive to create an environment where everyone feels respected, valued, and empowered to contribute their best work. Our hiring process is merit-based, and we welcome applications from all qualified individuals. We encourage you to communicate any reasonable accommodations you may need during the recruitment process and future employment. Please let your Talent team contact know ahead of any interview, we will be happy to suggest or confidentially discuss reasonable adjustments.

This role is a full time, employed position in the United Kingdom with a remote/hybrid work arrangement - 1 day per week in office expected (we are based close to London Bridge/ Borough/ Blackfriars.)

Please note: we are unfortunately unable to offer visa sponsorship so applicants should already have the right to work in the UK.

Benefits

• 25 days holiday + UK Bank Holidays
• An additional day off for your birthday
• Private healthcare or the option to use the budget to be reimbursed for other wellness activities of your choice
• Annual subscription to your choice of Calm or Headspace
• Early finish Fridays in the summer
• Pension scheme (enhanced after 1 year service)
• Enhanced family friendly policies after 1 year
• Option to work from abroad for a max of 1 month per year

AVANTIA LAW - CORE VALUES

We empower our people 

We trust our people to excel by giving them a voice, the freedom to grow, and the support they need to succeed. Together, we hold ourselves accountable and create meaningful impact—for our clients, our team, and our industry. 

We champion excellence 

Our values are at the heart of every decision we make. We stand by our commitments, consistently delivering exceptional results and building trust through every action. Excellence isn’t just a goal—it’s how we operate. 

We are building the future 

We’re redefining the legal landscape. Through innovation, challenging conventions and listening to our clients, we’re forging a new path and shaping the next generation of law.