{"id":111201,"url":"https://alion.io/job/trellance-senior-backend-developer","title":"Senior Backend Developer","company":{"id":44902,"name":"Trellance","domain":"trellance.com","url":"https://alion.io/company/trellance","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"ADP","truth_index":{"grade":"B","score":75,"open_postings":3,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":17000,"max_usd":40000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":139},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Alembic","optional":false},{"name":"Asyncio","optional":false},{"name":"Azure","optional":false},{"name":"Bicep","optional":false},{"name":"CI/CD","optional":false},{"name":"Django","optional":false},{"name":"Docker","optional":false},{"name":"FastAPI","optional":false},{"name":"Git","optional":false},{"name":"Kubernetes","optional":false},{"name":"Mypy","optional":false},{"name":"MySQL","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Pydantic","optional":false},{"name":"Pytest","optional":false},{"name":"Python","optional":false},{"name":"SQL","optional":false},{"name":"SQLAlchemy","optional":false},{"name":"Swagger","optional":false},{"name":"Terraform","optional":false},{"name":"Uvicorn","optional":false},{"name":"MS SQL","optional":true},{"name":"Oracle","optional":true}],"status":"live","first_seen_at":"2026-08-24T01:01:38Z","employer_posted_date":null,"last_verified_at":"2026-08-24T01:01:38Z","board_verified":false,"closed_at":null,"days_open":54,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":54},"description":"We are seeking a seasoned Senior Python Backend Developer with a total of 8+ years of professional software engineering experience, including a minimum of 5+ years dedicated strictly to web development. In this role, you will lead the architectural design, development, and scaling of our high-performance web systems. You will leverage Fast API to build robust asynchronous APIs, utilise advanced ORM tools to design efficient data layers, and implement secure, self-documenting API standards.\nResponsibilities:\nDesign and develop RESTful APIs using Fast API following our established API standards and best practices.\nImplement robust data models and database interactions using SQLAlchemy and PostgreSQL.\nOptimise database queries, handle complex migrations (e. g., Alembic), and implement caching strategies.\nImplement secure authentication and authorisation mechanisms using OAuth2 and JWT (JSON Web Tokens).\nDevelop and maintain core business logic in service and repository layers.\nEnsure all endpoints are fully documented and compliant with OpenAPI/Swagger specifications using FastAPI's native capabilities.\nWrite comprehensive unit, integration, and end-to-end tests for all code.\nCreate clear, detailed documentation for code, APIs, and architectural decisions.\nCollaborate with frontend developers to define API contracts and integration points.\nImplement and maintain high availability patterns and performance optimisations.\nParticipate in code reviews, providing constructive feedback to peers.\nTroubleshoot and resolve complex technical issues across the application stack.\nContribute to architectural decisions and help evolve our technology standards.\nRequirements:\nOverall 8+ years of professional experience in backend development.\nMinimum of 5+ years of dedicated experience in web development, building production-grade web applications and APIs.\nStrong proficiency in Python (6+ yrs) with a solid understanding of type hints, async/await, and modern Python features.\n2+ years of production experience with Fast API.\nProficiency with relational databases, particularly PostgreSQL.\nWorking knowledge of SQLAlchemy.\nExperience implementing RESTful APIs and understanding of API design principles.\nStrong understanding of software testing approaches (unit, integration, end-to-end).\nFamiliarity with containerization (Docker) and container orchestration.\nExperience with Git version control and CI/CD pipelines.\nKnowledge of secure coding practices and common security vulnerabilities.\nExperience with Pydantic for data validation and schema definition.\nFamiliarity with PostgreSQL advanced features (JSONB, full-text search, etc. ).\nExperience with asynchronous programming in Python.\nExperience with Uvicorn, an ASGI web server, for Python.\nUnderstanding of infrastructure as code (Terraform, Azure Bicep).\nExperience with Kubernetes in production environments.\nUnderstanding of event-driven architecture and message brokers.\nExposure to microservices architecture patterns.\nExperience with monitoring and observability tools.\nContributions to open-source projects.\nTechnical Competencies:\nPython 3.9+ features and language constructs.\nType hints and static type checking with mypy.\nError handling and exception management.\nAsynchronous programming with asyncio.\nDocumentation using Google-style docstrings.\nWeb Frameworks and APIs:\nPractical experience implementing OAuth2 flows and securely managing JWT authentication.\nExpert-level production experience with FastAPI, Pydantic, and asynchronous Python programming\nRequest validation and response formatting.\nPerformance optimisation techniques.\nDatabase:\nPostgreSQL schema design and optimisation.\nDeep, hands-on experience with modern Python ORMs, specifically SQLAlchemy (v2.0+)\nQuery optimisation and performance tuning.\nTransaction management.\nStrong proficiency in SQL (PostgreSQL, MySQL) and database migration tools like Alembic.\nTesting:\nTest-driven development practices.\nProficiency in testing asynchronous code and secure endpoints using pytest\nIntegration testing for APIs and databases.\nMocking and fixtures.\nCode coverage analysis.\nDevOps and Infrastructure (Nice to have):\nSolid knowledge of Docker, Kubernetes, and cloud ecosystems (Azure)\nCI/CD pipeline configuration.\nInfrastructure as code concepts.\nDevelopment Standards Expertise:\nThe ideal candidate will demonstrate an understanding of and commitment to:\nDomain-driven design principles\nAPI-first development approach\nMonitoring and logging implementation.\nHigh availability patterns\nTest-driven development\nSecurity by design\nExperience with Python performance profiling and memory management.\nFamiliarity with database optimisation techniques (indexing, connection pooling, and query plan analysis).\nContinuous delivery practices\nProven experience building self-documenting APIs with OpenAPI / Swagger UI.\nCode quality and maintainability\nPerformance optimization\nError handling best practices\nMust-haves:\nSolid web development understanding.\nPython backend development: FastAPI preferred; Django + less FastAPI acceptable.\nAt least Intermediate SQL (4 yrs) - it can be Postgres, MS SQL, Oracle - doesn't matter as long as they can write intermediate-level queries/functions / stored procedures.\nFamiliar with modern software project practices: CI/CD pipelines, Git, Cloud.\nAble to review code and guide/mentor the team on architecture standards and guidelines.\nA quick learner who can scale up and fill gaps where the team needs coverage.\nCommunication good enough to understand US accents and talk to clients.","description_format":"text","description_chars":5561,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-08-24T01:01:38Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 1","filings_12m":1,"filings_prev_12m":0,"green_card_filings_12m":0,"median_offered_wage_usd":132500,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)"],"filings_for_role_12m":0}],"liveness":{"score":11,"band":"cold","label":"Long shot","p_open":0.4,"p_active":0.591,"p_room":0.45,"age_days":53,"expected_fill_days":28,"reasons":["seen:53","win:tail"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/trellance-senior-backend-developer","json_url":"https://alion.io/job/trellance-senior-backend-developer.json","meta":{"generated_at":"2026-10-17T02:06:52Z","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_verified","counted_by":"address","units_charged":1,"used_today":3100,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":44902},"rest":"https://alion.io/mcp/rest/get_company?id=44902"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftrellance-senior-backend-developer"},{"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%2Ftrellance-senior-backend-developer"},{"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%2Ftrellance-senior-backend-developer"},{"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/trellance-senior-backend-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftrellance-senior-backend-developer"}]}