# Senior Full-stack Engineer (backend-heavy) at Preply

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Lead backend-heavy full-stack initiative

- **Company:** Preply (https://jobs.trythestack.co/companies/preply)
- **Location:** Barcelona, Spain
- **Work arrangement:** Hybrid
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Python, Django, React, TypeScript, Agentic AI, System design, API development, Distributed systems, CI/CD, Observability, Technical leadership, Mentorship, A/B testing, Data-driven decision making, Full-stack development, Software architecture
- **Posted by employer:** 2026-08-10
- **Added to The Stack:** 2026-08-11
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/preply/775094bc-d735-4d6f-bc21-3d2e7b1f2ff5 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-full-stack-engineer-backend-heavy-preply

## About the role

Responsibilities:
- Lead backend-heavy full-stack initiatives: design, implement, and own backend services (Python/Django) and frontend components (React/TypeScript).
- Collaborate with cross-functional teams (PMs, designers, data analysts) to deliver measurable product outcomes and run experiments (A/B tests).
- Architect scalable, reliable systems and integrations with third-party vendors; focus on observability, monitoring, and CI/CD.
- Mentor engineers, run architecture and code-quality reviews, and promote AI-augmented development practices.
- Drive data-driven decisions by instrumenting metrics and improving service reliability at scale.

Requirements:
- 5+ years of software engineering experience with strong backend expertise and system-design capability.
- Hands-on experience with Python/Django (or equivalent backend stack) and React/TypeScript on the frontend.
- Experience with distributed systems, API design, CI/CD pipelines, observability, and running experiments.
- Strong communication skills in English and demonstrated ability to lead technical initiatives and mentor teammates.
- Comfortable working in a high-deployment-frequency, data-driven environment and adopting AI-augmented tooling.

## Responsibilities

You will lead complex full-stack initiatives using Python/Django and React while driving engineering excellence through mentorship and architectural reviews. You will also collaborate with cross-functional teams to deliver data-driven product outcomes and integrate AI-augmented development workflows.

## Requirements

The role requires senior-level full-stack expertise with a backend-heavy focus and deep hands-on experience in Agentic AI. Candidates must demonstrate strong system design skills, the ability to navigate technical ambiguity, and excellent communication skills in English.

## FAQ

- **Is this Senior Full-stack Engineer (backend-heavy) role still open?** It was posted on 2026-08-10. Listings more than 30 days old may no longer be active, so check Preply's site before applying.
- **Does Preply offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Preply's site.
- **Where is this role located?** The listing gives the location as Barcelona, Spain. It is marked hybrid.
- **What skills does this role ask for?** The listing names: Python, Django, React, TypeScript, Agentic AI, System design, API development, Distributed systems, CI/CD, Observability, Technical leadership, Mentorship, A/B testing, Data-driven decision making, Full-stack development, Software architecture.

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## Notes for agents

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