{"id":2407106,"url":"https://alion.io/job/kots-senior-back-end-developer","title":"Senior Back-End Developer","company":{"id":4373326,"name":"Kots","domain":"kots.world","url":"https://alion.io/company/kots-2","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Zoho Recruit","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","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":133},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon ECS","optional":false},{"name":"AWS","optional":false},{"name":"AWS Fargate","optional":false},{"name":"AWS Lambda","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"FastAPI","optional":false},{"name":"Flask","optional":false},{"name":"GCP","optional":false},{"name":"Git","optional":false},{"name":"Java","optional":false},{"name":"MySQL","optional":false},{"name":"OWASP","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Pytest","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"Angular","optional":true},{"name":"Apache Kafka","optional":true},{"name":"Asyncio","optional":true},{"name":"AWS CDK","optional":true},{"name":"Celery","optional":true},{"name":"DynamoDB","optional":true},{"name":"JavaScript","optional":true},{"name":"Redis","optional":true},{"name":"Terraform","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-09-22T00:00:00Z","employer_posted_date":"2026-09-22","last_verified_at":"2026-10-13T04:08:49Z","board_verified":true,"closed_at":null,"days_open":21,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":21},"description":"Senior Back-End Developer PythonSQL\nAWS\nAbout the Role We are looking for a hands-on Senior Back-End Developer who writes production-grade server-side code. You will design and build the services and data layer behind our applications using Python, with relational databases underneath - all deployed and operated on AWS. This is a builder's role, not a coordinator's. You should be comfortable writing complex SQL by hand, designing REST APIs that other teams depend on, reasoning about performance and failure, and owning your code through testing, deployment and production support. What You'll Do\nDesign, build, and maintain Python (Flask/FastAPI) services and REST APIs consumed by our front ends and partners.\nWrite and optimise advanced SQL - multi-table joins, subqueries, CTEs, and window functions - without leaning on an ORM to do the thinking for you.\nModel and evolve relational schemas, design indexes, and tune slow queries using EXPLAIN / EXPLAIN ANALYZE.\nPlan and run schema migrations safely against live data.\nHandle authentication, authorisation, and the security of the endpoints you expose.\nBuild background jobs, queues, and scheduled work, and make them safe to retry.\nWrite meaningful unit and integration tests for the code and modules you ship.\nDeploy, monitor, and troubleshoot services on AWS, and improve build and release pipelines.\nReview peers' code, uphold quality standards, and mentor less experienced developers. What We're Looking For This is a senior back-end role - we expect depth in Python and in relational databases, and the ability to run what you build.\n5+ years of relevant, hands-on back-end development experience.\nPython - solid backend experience building REST APIs (Flask or FastAPI), not just scripting.\nSQL - ability to write advanced queries from scratch and reason about how they execute; PostgreSQL and/or MySQL in production.\nSchema design, indexing, and query optimisation on real data volumes.\nAWS - practical experience deploying and running workloads (e.g. ECS/Fargate, Lambda, RDS).\nAPI security - authentication and authorisation (JWT, OAuth2) and common OWASP risks.\nTesting - able to write proper unit and integration tests with pytest.\nComfort with Git workflows, Docker, and CI/CD pipelines. This Role Is Not a Fit If…\nYou work only in Java and have no Python experience or familiarity.\nYou rely entirely on ORMs and cannot write raw SQL queries yourself.\nYour Python is scripting and automation only - you have never built and run a production service.\nYou have never worked with AWS. (Experience on GCP or Azure is a plus, but AWS experience is required.)\nYou have never written tests for your own code.\nYou are looking for a role that is mostly front-end work. Nice to Have\nAsync Python (asyncio) and an understanding of concurrency trade-offs.\nQueues and background processing - Celery, SQS, or Kafka.\nCaching strategies with Redis, and knowing when not to cache.\nInfrastructure as code (Terraform or AWS CDK).\nObservability - structured logging, metrics, tracing, and useful alerts.\nNoSQL stores (MongoDB, DynamoDB) alongside relational databases.\n• Enough front-end familiarity (Angular or React) to debug an integration end to end. CTC range is 10-12L Please fill the below form as part of your skill assessment. https://zfrmz.in/REsxwPXLx1OwS34xWCDQ Requirements ____________________________","description_format":"text","description_chars":3367,"description_truncated":false,"requirements":{"experience_years_min":5,"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":["Real Estate Rental","Residential Real Estate"],"lifecycle":[{"event":"open","at":"2026-10-13T01:09:05Z"}],"visa":[],"liveness":{"score":55,"band":"ok","label":"Likely open","p_open":1,"p_active":0.731,"p_room":0.75,"age_days":21,"expected_fill_days":22,"reasons":["conf:1","win:late"],"computed_at":"2026-10-13T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/kots-senior-back-end-developer","json_url":"https://alion.io/job/kots-senior-back-end-developer.json","meta":{"generated_at":"2026-10-13T06:33:10Z","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":10066,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-14T00:00:00Z"}},"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":4373326},"rest":"https://alion.io/mcp/rest/get_company?id=4373326"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fkots-senior-back-end-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%2Fkots-senior-back-end-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%2Fkots-senior-back-end-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/kots-senior-back-end-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fkots-senior-back-end-developer"}]}