{"id":40038,"url":"https://alion.io/job/plum-senior-backend-engineer-ai-platform","title":"Senior Backend Engineer | AI Platform","company":{"id":51382,"name":"Plum","domain":"withplum.com","url":"https://alion.io/company/withplum","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"A","score":95,"open_postings":4,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":75,"computed_at":"2026-10-17T05:46:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Athens, Greece","London, United Kingdom","Nicosia, Cyprus"],"countries":["GR","GB","CY"],"hiring_countries":["GR","GB","CY"],"hiring_countries_total":3,"salary":null,"salary_estimate":{"min_usd":36000,"max_usd":93000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":2102},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CrewAI","optional":false},{"name":"GCP","optional":false},{"name":"Google ADK","optional":false},{"name":"Guardrails AI","optional":false},{"name":"Incident Management","optional":false},{"name":"LangChain","optional":false},{"name":"LangGraph","optional":false},{"name":"LLM","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"Platform Engineering","optional":false},{"name":"Prompt Engineering","optional":false},{"name":"RAG","optional":false},{"name":"BigQuery","optional":true},{"name":"FastAPI","optional":true},{"name":"Firestore","optional":true},{"name":"Google BigQuery","optional":true},{"name":"Grafana","optional":true},{"name":"Langfuse","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Prometheus","optional":true},{"name":"Python","optional":true},{"name":"RabbitMQ","optional":true},{"name":"Sentry","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-07-08T00:00:00Z","employer_posted_date":"2026-07-08","last_verified_at":"2026-10-19T02:34:32Z","board_verified":true,"closed_at":null,"days_open":103,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":103},"description":"Millions of people want to grow their money but don't know where to start. More than 90% of adults don’t access traditional financial advice. That's the gap Plum was built to close.\nWe're building the proactive money platform that makes it easy for people to smartly and sustainably grow their money. Whether you're stashing the cash for tea and toast in your first home or catching some rays during retirement, we've got your back.\nSince 2016, millions of people across 10 European markets have set aside more than £10 billion with Plum. But what we're most excited about is what comes next and the opportunity for our people to help shape it.\nWe're now going after something even bigger: the £2 trillion+ advised market in the UK and beyond, currently locked behind high fees and complexity. By combining AI-driven financial guidance with the products people actually need, we're building a solution for everyone, not just the wealthy few.\nAt Plum, you'll be part of a team that's ambitious, curious and driven. We move fast, learn from what doesn't work, challenge the status quo and, most importantly, build something that makes people's lives better. We believe great ideas can come from anywhere, and that the best work happens when people feel trusted to take ownership, collaborate openly and bring their whole selves to work.\nJoin nearly 300 Plumsters and be part of a team shaping the future of money\nThe Role\nAs part of the AI Platform team, you will play a key role in building the foundational infrastructure, frameworks, and tooling that enable AI-powered products and capabilities across the organization. This role requires a high degree of autonomy and ownership, as you'll be responsible for designing scalable solutions that empower multiple engineering teams while ensuring reliability, observability, and cost efficiency.\nWhat are we looking for:\n5+ years of experience in Software Engineering, Backend Engineering, or Platform Engineering.\nStrong experience building and maintaining backend systems and distributed services in production environments.\nExperience designing developer platforms, internal tooling, shared services, or infrastructure that supports multiple engineering teams.\nHands-on experience building AI-powered applications and services using modern LLM frameworks and agentic architectures.\nGood understanding of modern AI concepts and practices, including:\nLarge Language Models (LLMs)\nRetrieval-Augmented Generation (RAG)\nPrompt Engineering\nAI Guardrails\nAI Evaluation Frameworks\nExperience with AI frameworks such as Agent Development Kit (ADK), LangChain, LangGraph, CrewAI, or similar.\nExperience working with cloud platforms such as Google Cloud Platform (preferred), AWS, or Azure.\nStrong understanding of system reliability, observability, monitoring, and incident management.\nExperience with Infrastructure as Code and cloud-native architectures.\nPrevious experience working within a Platform Engineering team is a strong plus.\nKey responsibilities:\nDesign, build, and maintain a robust, scalable, and cost-effective AI Platform that supports AI initiatives across the organization.\nDevelop and maintain internal frameworks, libraries, and services used by multiple product squads.\nEstablish and promote best practices around prompt engineering, AI guardrails, and AI evaluation methodologies.\nBuild platform capabilities that enable teams to safely deploy, monitor, and iterate on AI-powered applications.\nConfigure and maintain tracing, monitoring, observability, and incident management solutions to ensure platform reliability.\nPartner closely with product and engineering teams to understand their needs and provide scalable platform solutions.\nContinuously improve developer experience and platform adoption across the organization.\nTech Stack:\nBackend\nPython\nFastAPI\nAgent Development Kit (ADK)\nDatastores\nPostgreSQL\nBigQuery\nFirestore\nInfrastructure\nGoogle Cloud Platform (GCP)\nRabbitMQ\nTerraform\nMonitoring & Observability\nGrafana\nPrometheus\nLangfuse\nincident.io\nSentry\nWhat to Expect from Our Hiring Process\nAt Plum, we value a lot the time you devote to the hiring process, this is why we are always trying to make the process as fast and smooth as possible.\n 30 min. Call with ourTalent Acquisition Team. So we understand better your career plan, tell you more about Plum and the role \n45 min. Call with our Engineering Lead. Brief technical discussion about the role and your skills \n120 min. Live Coding Call with our Engineers, including System Design exercise and an Implementation phase\n30 min. TeamCall with a Product Manager and a Senior Manager from Engineering, for you to understand the business and envision yourself as part of Plum \n Offer \nPlum's Perks\nOwn part of the company you're helping grow through stock options\nPrivate health insurance\nAnnual training budget\nPlum Premium for free\nCompetitive referral scheme\nFlexible approach to remote working: we encourage at least 2 days a week in one of our beautiful offices in London, Athens or Cyprus\nTeam breakfasts and team lunches\n25 days holiday + bank holidays\n45 work-from-anywhere days to give you flexibility to work your way\n2 weeks sabbatical after 4 years to take the break you deserve\nEnhanced parental leave\n1 paid volunteering day annually\nAnnual team trip to a surprise destination!\nA fun, inclusive company culture (think )\nIf you think this sounds like you, don’t hesitate to get in touch!\nThanks,\nPlum Τeam\n*Plum is an Equal Opportunity Employer. Plum does not discriminate on the basis of age, race, religion, sex, gender identity, sexual orientation, non-disqualifying physical or mental disability, national origin or any other basis covered by appropriate law. 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