Python Backend Engineer

Job description

Healf was founded by two brothers - Max and Lestat - with a relentless drive to reshape health and wellness.

Their journey has been fuelled by hard work, intensity, and a commitment to build something transformative.

Like all of us, they’re here to make a lasting impact.

Build the Future of Wellbeing

Do Your Life’s Best Work

If modern wellbeing were redesigned from scratch, it wouldn’t live in a GP’s office or a cluttered supplement aisle.

It would be digital-first, beautifully curated, and powered by data that actually helps you feel your best.

That’s what we’re building at Healf.

An ecommerce platform at the intersection of personalised health and curated wellbeing.

We connect customers with the world’s most effective products across EAT, MOVE, MIND, and SLEEP, and we’re just getting started.

We combine culture-shaping storytelling, cutting-edge health tech (like our new blood testing platform, Healf Zone), and a best-in-class product experience to help people build rituals that work.

Backed by investors behind Soho House, Alo Yoga, Cult Beauty, and Innocent, we’re scaling fast, and redefining how the world shops and lives well.

About Us

At Healf, we’re not just a company, we’re a movement.

Founded by two brothers whose own wellbeing journeys inspired our mission to empower others, Healf is built on grit, determination, and a shared understanding of the power of wellbeing.

Our culture is grounded in The Healf Standard—five principles that define how we work and win:

• We Work Harder Than Anyone Else: Building something that improves lives takes long hours, grit, and sacrifice, but we thrive on it.

We all feel energised by what we’re building.

• Never Settle: We challenge the status quo and push ourselves to be better every day.

We never settle for mediocrity or the idea that something can’t be done.

• Obsession Over Talent: Talent alone isn’t enough—relentless curiosity and a drive to grow set us apart.

• The Healf Lifestyle: We live what we preach—our personal commitment to wellbeing fuels our professional productivity.

• Stronger Together: Everyone owns their lane, but we run as a unit.

With Healf Zone on the horizon, we’re entering the next phase of our journey: closing the loop on health with personalised, preventative care that unlocks longevity and optimised wellbeing.

This is your chance to help build something that’s not only extraordinary, but a first of its kind.

The Role

We're scaling rapidly across Web/Frontend and Backend/AI.

To keep pace, we need a hands-on technical leader who can balance deep execution with architectural foresight.

You'll bridge strategy and implementation: co-creating architecture and engineering standards with the Head of Engineering, while directly leading teams to build systems that scale sustainably—without bottlenecks.

Where You’ll Make An Impact

• Build high-throughput, asynchronous APIs and microservices in Python with FastAPI.

• Design and evolve Postgres schemas, migrations, and performance tuning (query plans, indexes, connection pooling).

• Implement authentication/authorisation (OAuth2/JWT), input validation, rate-limiting, and robust error handling.

• Add observability for services: structured logging, tracing, metrics, and actionable dashboards/alerts.

• Design scalable, secure AWS infrastructure (ECS/EKS, Lambda, ElastiCache, S3, DynamoDB) using infrastructure-as-code preferably Pulumi.

• Ship via containerized CI/CD (GitHub Actions, ArgoCD) with automated tests, blue-green/canary deployments, and rollbacks.

• Collaborate with product and design to turn requirements into well-scoped, production-ready features; write clear docs and participate in code reviews.

What You’ll Bring

• 5+ years backend Python experience building production services and APIs.

• Mastery of async Python patterns (asyncio, uvicorn, pydantic v2) and strong typing discipline.

• Hands-on experience architecting cloud-native, horizontally scalable systems on AWS.

• Deep familiarity with Postgres (schema design, performance, resilience) and ORMs (e.g., SQLAlchemy or equivalent).

• Solid grounding in DevOps practices: IaC (Pulumi or Terraform), automated testing (pytest), security scanning, and performance profiling.

Nice to Have (Not Required):

• Experience with FastAPI dependencies, background tasks, and websockets at scale.

• Caching and messaging (Redis/**ElastiCache**, SQS/SNS, Kafka).

• Exposure to LLM tooling (e.g., LangChain) and retrieval patterns (embeddings/RAG) useful but not required.

• Working knowledge of ML concepts and/or model training pipelines (bonus only).

Why Join Healf

• Do your life’s best work: Build something that matters, with a team that moves fast and aims high

• Surround yourself with A+ talent: You’ll work with high-performers who care deeply and raise the standard every day

• Be a builder: This isn’t a cog-in-the-machine role.

You’ll help shape our voice, culture, and growth

• Wellbeing is the lifestyle: From office yoga to Healf Zone insights, everything we do is rooted in our pillars: EAT MOVE MIND SLEEP

Required Skill Profession

Computer Occupations