Vesynta

Vesynta is an investor-backed precision medicine company based within the London Cancer Hub. We are building clinical decision support software that personalises dosing of critical therapies at the point of care which provide clinicians with access to data-backed pharmacology models; resulting in fewer toxic side effects, and significantly improved treatment efficacy. We exist to support patients (children, but also women and those with diverse ethnic heritages) who have been traditionally under-represented and poorly served by traditional, coarse dosing methodologies. Our team is fast-paced, results-oriented, and mission-driven.

The Job

Drive the development of impactful healthcare solutions as our Lead Back-End Software Engineer. You'll architect, build, and scale our core platform in collaboration with our talented frontend and pharmacology/data science teams. You'll own the back-end architecture, ensuring its robustness, security, and performance. This is a high-impact role where you'll directly contribute to improving the lives of children undergoing cancer treatment by enabling personalised dosing.

You will:

• Design and develop high-quality, maintainable backend code using Python/Django.
• Architect and evolve our backend, ensuring its robustness, security, and scalability.
• Implement and manage CI/CD pipelines for secure and efficient deployments.
• Mentor junior developers, fostering a collaborative and high-performing team.
• Collaborate with cross-functional teams, translating product requirements into technical solutions.
• Interface directly with the CTO and product owner, guiding technical strategy and translating requirements into actionable technical plans and deliverables.

A full role specification will be supplied to candidates as part of the application process.

The Products

Our web, mobile and Electronic Health Record-integrated applications offer best-in-class actionable precision dosing insights to healthcare professionals, supporting the end-to-end process of Therapeutic Drug Monitoring and Model Informed Precision Dosing. With these, the primary users (hospital-based clinicians, pharmacists and nurses) are able to provide patients with enhanced and personalised care across several therapeutic areas including antibiotics, chemotherapeutics and immunosuppressants.

Our recruitment process

We conduct our entire recruitment process online to ensure fairness and accessibility for all candidates. Each stage is distinct and focuses on different attributes. The process is intended to be efficient (typically taking around 2-3 weeks to complete) - some stages are particularly quick to schedule and progress through. Here’s a breakdown:

1. Application Submission: Submit your CV along with answers to initial screening questions.
2. Online Coding Assessment: Demonstrate your coding skills through a HackerRank assessment.
3. Introductory Video Call: Have a brief meeting with the hiring manager to discuss your background.
4. One-Way Video Interview: Showcase your soft skills and professional practices in a recorded format.
5. Technical Interview: Engage in a 1-1 interview with a software engineering team member, expect live coding and technical questions.
6. Executive Interview: Participate in a candidate-led discussion with an executive team member.
7. Final Assessment: Complete an online take-home assignment (focusing on design), followed by a live discussion session with the team.

How we work with recruiters

We value the expertise of recruiters and welcome you to submit relevant candidates. Please send anonymised CVs to  - all submitted CVs will be reviewed as part of our applicant pool. We are managing this search internally and are not currently considering exclusive agreements or upfront retainer arrangements. However, we are willing to pay a finders' fee for successful placements.

Requirements

Essential

• 5+ years of backend web application development experience, with a proven track record of designing, building, and deploying production-grade applications in cloud environments.
• Advanced proficiency in Python and Django, including the Django REST Framework.
• In-depth understanding of PostgreSQL and SQL, encompassing database design, optimization, and schema management.
• Proven experience in designing, developing, and maintaining RESTful APIs and WebSocket interfaces.
• Experience with cloud platforms (AWS, Azure, or GCP), including database deployment and cloud-native architectures.
• Practical knowledge of security best practices (authentication, authorization, encryption) for handling sensitive user data.
• Experience implementing and managing CI/CD pipelines.
• Willingness to work from our London HQ 1–3 days per week as part of a hybrid model.
• Experience with message queuing systems and load balancing techniques.

Desirable

• Experience integrating with prominent Electronic Healthcare Record systems (specifically EPIC or Oracle Cerner), and FHIR HL7 standards for healthcare data exchange.
• Infrastructure as Code (IaC) tools
• Experience working alongside data scientists/engineers (working in R).
• SaaS application deployment, performance tuning and optimization.
• Experience integrating Large Language Models (LLMs) into applications.

If you're passionate about our mission and confident you can make a significant contribution, we encourage you to apply (even if you don't perfectly match every requirement). While this posting is for a Lead Back-End Engineer, we may, on occasion, identify exceptional candidates who are a strong fit for our team but whose experience aligns more closely with a different role. In such cases, we may discuss alternative opportunities within Vesynta.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Benefits

• Impact Opportunity to create, and deliver real-world impact for children who are critically ill.
• Flexibility Hybrid and flexible working policy, where team well-being and quality of work are prioritised.
• Growth: Opportunities for professional development, mentorship, open-source contributions, and shaping our technical direction.
• Compensation Competitive salary, 30 days annual leave, subsidised private health insurance, salary sacrifice schemes (home tech., bicycles, electric cars), stock options and more.
• Support and Culture Independent HR, TOIL provision, Employee Assistance Programme (ensuring personal and professional well-being), NEST workplace pension, structured parental leave packages, family-friendly working arrangements and inclusive company socials.
• Visa Sponsorship Vesynta is a UK approved VISA sponsor.