ph3WHO WE ARE /h3pWe help creators get more out of every conversation with Instagram-focused automations and support for other channels like Messenger, WhatsApp, and TikTok. The result? Better engagement, more sales, and real, sustainable growth. With a diverse team of 350+ people across three continents, we’re building the leading Chat Marketing platform - trusted by more than 1.5 million customers worldwide. AI is one of our top strategic priorities. We’re building intelligent, production-grade systems that power conversations at scale - and we’re just getting started. /ph3WHO WE'RE LOOKING FOR /h3pWe’re hiring a Senior Python Engineer to build and evolve a Python-based platform layer that extends and scales Manychat’s eng core. This is not a standalone backend. This layer acts as a bridge and execution environment for high-load, business-critical workflows that cannot be efficiently handled inside the core system. Your primary focus will be designing systems that: /pullidecouple and offload complexity from the core platform /lilienable scalable execution of business logic /liliprovide reliable communication between services /li /ulpThis role is idóneo for someone who: /pullithinks in systems, not services /liliunderstands trade-offs of distributed architectures /lilican turn loosely defined problems into stable production solutions /liliis comfortable working close to platform boundaries and constraints /li /ulh3WHAT YOU'LL DO /h3pDesign and build a Python-based platform layer that integrates with the core system. Define and evolve patterns for service communication, orchestration, and responsibility split between core and Python services. Develop scalable, async services handling high-load and latency-sensitive workflows. Own API contracts between systems,



ensuring stability, backward compatibility, and clear boundaries. Identify and extract functionality from the core into scalable services where it improves performance or maintainability. Ensure reliability of cross-system interactions through observability (monitoring, logging, tracing). Design for failure: retries, idempotency, consistency guarantees. Drive engineering quality: testing strategy, CI/CD, safe rollout practices. Work closely with Platform and Product teams to align architecture with business needs. Contribute to long-term platform scalability, not just feature delivery. /ph3TO SHINE IN THIS ROLE /h3pYou’ll need: /pulli5+ years of commercial Python development in production environments. /liliStrong expertise in modern Python frameworks (FastAPI preferred; Django/Flask acceptable). /liliSolid experience designing and integrating APIs (including third-party services). /liliStrong understanding of async programming and concurrency (AsyncIO, non-blocking I/O). /liliExperience working with PostgreSQL and large datasets. /liliExperience building and maintaining high-load backend systems. /liliStrong testing practices (unit and integration tests; PyTest preferred). /liliExperience with CI/CD pipelines and Docker. /liliStrong ownership and product mindset - able to align with stakeholders and connect engineering work to business impact.



/li /ulpIt would be great if you have: /pulliExperience working with loaded projects and queue systems. /liliSkills working with infrastructure. /liliExperience working with third-party API. /liliKnowledge of different NoSQL solutions and analytical systems. /liliReplication, partioning, sharding, PL/pgSQL, and other attributes of profound work with databases. /li /ulh3WHAT WE OFFER /h3ulliHybrid onboarding to start remotely and relocation support for you and your family. /liliComprehensive health insurance for you and your family. /liliProfessional development budget for conferences, courses, and learning resources. /liliFlexible benefits package tailored to your priorities. /liliHybrid work and generous leave options for work-life balance. /liliIn-office perks including free meals and snacks. /liliCompany-funded sports activities, annual offsites, and team-building events. /li /ulpManychat is an Equal Opportunity Employer. We’re committed to building a diverse and inclusive team. We do not discriminate against qualified employees or applicants because of race, color, religion, gender identity, sex, sexual preference, sexual identity, pregnancy, national origin, ancestry, citizenship, age, marital status, physical disability, mental disability, medical condition, military status, or any other characteristic protected by local law or ordinance. This commitment is also reflected through our candidate experience. If you have individual needs that may require an accommodation during the interview process, please indicate this in your application. We will do our best to provide assistance throughout your interview process to ensure you’re set up for success. /p /p #J-18808-Ljbffr

📌 Senior Python Engineer (Billing) (Barcelona)
🏢 Doist
📍 Barcelona