{"id":2171892,"url":"https://alion.io/job/crodu-mid-ai-backend-engineer","title":"Mid+ AI / Backend Engineer","company":{"id":4372519,"name":"Crodu","domain":"crodu.com","url":"https://alion.io/company/crodu","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Schema","truth_index":null},"role":"AI/ML","role_family":"AI/ML","seniority":"middle","employment_type":"contractor","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":160,"max":220,"currency":"PLN","period":"hour","gross":null,"usd_annual":112000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Alembic","optional":false},{"name":"Amazon ECS","optional":false},{"name":"Amazon S3","optional":false},{"name":"Anthropic","optional":false},{"name":"API Gateway","optional":false},{"name":"AWS","optional":false},{"name":"AWS CDK","optional":false},{"name":"AWS Lambda","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude","optional":false},{"name":"Dependency Injection","optional":false},{"name":"Docker","optional":false},{"name":"FastAPI","optional":false},{"name":"Function Calling","optional":false},{"name":"Gemini","optional":false},{"name":"GitHub Actions","optional":false},{"name":"GitLab CI","optional":false},{"name":"Kubernetes","optional":false},{"name":"LLM","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"OpenAI","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Pydantic","optional":false},{"name":"Python","optional":false},{"name":"RAG","optional":false},{"name":"Terraform","optional":false},{"name":"Tool Use","optional":false},{"name":"Celery","optional":true},{"name":"Fine-tuning","optional":true},{"name":"GraphQL","optional":true},{"name":"GraphRAG","optional":true},{"name":"gRPC","optional":true},{"name":"LoRA","optional":true},{"name":"Neo4j","optional":true},{"name":"PEFT","optional":true},{"name":"Pulumi","optional":true},{"name":"QLoRA","optional":true},{"name":"RabbitMQ","optional":true},{"name":"Redis","optional":true},{"name":"TensorRT","optional":true},{"name":"TensorRT-LLM","optional":true},{"name":"TGI","optional":true},{"name":"TypeScript","optional":true},{"name":"vLLM","optional":true}],"status":"live","first_seen_at":"2026-08-20T00:00:00Z","employer_posted_date":"2026-08-20","last_verified_at":"2026-10-10T23:03:52Z","board_verified":true,"closed_at":null,"days_open":52,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":52},"description":"About the project\nFor a fast-growing startup building a B2B AI platform on autonomous agents, we are looking for a Mid+ AI / Backend Engineer.\nThe client's platform takes tedious analytics off enterprise teams through a flexible architecture, agentic solutions and advanced workflows. You will join the engineering team with real influence over the architecture of systems that go straight to production: you build and scale both the backend infrastructure and the AI systems.\nWe are looking for someone who is not a senior engineer yet but is close to it. The client wants to work with someone independent: you get a well-described task and you deliver it without being walked through it.\nDay to day\nBuild and grow scalable backend services (Python, FastAPI) that power the AI platform.\nBuild and optimise RAG pipelines, AI agent systems and LLM orchestration in production.\nHelp build the cloud infrastructure (AWS / Azure), including multi-tenant isolation and serverless functions.\nBuild a flexible integration ecosystem driven by APIs and third-party connectors.\nReview code, keep testing standards up and mentor junior engineers.\nSystem security: JWT, OAuth2, RBAC, protection against prompt injection.\nRequirements\n3-5 years of commercial backend experience in Python.\nStrong FastAPI (async, Pydantic, dependency injection).\nPostgreSQL: schema design, query optimisation, migrations (Alembic).\nAI systems (LLM, RAG): tool calling, function calling, multi-step reasoning, MCP (Model Context Protocol).\nCloud: AWS (Lambda, S3, ECS, API Gateway) and/or Azure.\nDocker, Kubernetes, CI/CD (GitHub Actions, GitLab CI), IaC (Terraform / AWS CDK).\nProduction experience integrating LLM APIs (OpenAI, Anthropic Claude, Google Gemini).\nStrong written and spoken English.\nNice to have\nTypeScript with an advanced type system (generics, utility types, conditional types).\nCelery and asynchronous task processing (Redis / RabbitMQ).\nGraphRAG and graph databases (Neo4j).\nServing LLMs on-premise (vLLM, TGI, TensorRT-LLM), fine-tuning (LoRA / QLoRA).\nPulumi, gRPC or GraphQL.\nThe process\nScreening call with CRODU (about 20 minutes).\nTechnical conversation with the client's team.\nDecision and start.","description_format":"text","description_chars":2192,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","AI Consulting & Integration"],"lifecycle":[{"event":"open","at":"2026-10-09T12:30:46Z"}],"visa":[],"liveness":{"score":28,"band":"fade","label":"Fading","p_open":1,"p_active":0.621,"p_room":0.45,"age_days":51,"expected_fill_days":28,"reasons":["conf:1","urgency","win:tail"],"computed_at":"2026-10-10T05:45:15Z"},"pay":{"stated_usd_annual":112000,"is_top_pay":false},"html_url":"https://alion.io/job/crodu-mid-ai-backend-engineer","json_url":"https://alion.io/job/crodu-mid-ai-backend-engineer.json","meta":{"generated_at":"2026-10-11T00:33:55Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":470,"day_limit":5000,"remaining_today":4530,"minute_limit":60,"resets_at":"2026-10-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":4372519},"rest":"https://alion.io/mcp/rest/get_company?id=4372519"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcrodu-mid-ai-backend-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fcrodu-mid-ai-backend-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fcrodu-mid-ai-backend-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/crodu-mid-ai-backend-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcrodu-mid-ai-backend-engineer"}]}