{"id":4061695,"url":"https://alion.io/job/saas-labs-sde-4-voice","title":"SDE 4 - Voice","company":{"id":6502,"name":"SaaS Labs","domain":"saaslabs.co","url":"https://alion.io/company/saas-labs","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Kula","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":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"Docker","optional":false},{"name":"Function Calling","optional":false},{"name":"GCP","optional":false},{"name":"Go","optional":false},{"name":"gRPC","optional":false},{"name":"Kubernetes","optional":false},{"name":"LiveKit","optional":false},{"name":"LLM","optional":false},{"name":"Python","optional":false},{"name":"Speech Recognition","optional":false},{"name":"Text-to-Speech","optional":false},{"name":"Voice Agents","optional":false},{"name":"WebRTC","optional":false},{"name":"WebSockets","optional":false}],"status":"live","first_seen_at":"2026-11-10T08:55:50Z","employer_posted_date":"2026-11-10","last_verified_at":"2026-11-11T08:55:50Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Why this role exists\nJustCall is hiring an SDE 4 (Senior Software Engineer, Voice AI) in Noida or Bangalore to build and scale the real-time voice AI infrastructure powering AI voice agents for 6,000+ businesses across 70+ countries.\nThis is a senior individual contributor role for an engineer who has built and shipped production-grade real-time systems and understands the complexities of voice, streaming and conversational AI. You'll own the architecture and engineering of low-latency voice pipelines, ensuring AI agents can listen, respond and interact naturally over live calls.\nWe're looking for someone who combines strong backend engineering with hands-on experience in voice AI, distributed systems and real-time communication.\nWhat you'll actually do\nBuild real-time voice pipelines: Design and scale streaming ASR, LLM and TTS pipelines, optimising response time, throughput and reliability.\n\nOwn conversational intelligence: Build voice activity detection, turn-taking, endpointing and interruption handling to make conversations natural and responsive.\n\nEngineer real-time communication: Build and optimise audio streaming systems using WebRTC, WebSockets, SIP and media servers.\n\nDevelop AI agent orchestration: Implement LLM integrations, tool calling, conversation state, context management and fallback mechanisms.\n\nOptimise voice performance: Reduce end-to-end latency, improve audio quality and optimise infrastructure and model costs.\n\nBuild evaluation frameworks: Measure speech accuracy, response latency, call quality and task completion to continuously improve agent performance.\n\nScale production systems: Build reliable, highly concurrent services with appropriate monitoring, observability and fault-tolerance mechanisms.\n\nDrive technical ownership: Lead architecture decisions, conduct design reviews, mentor engineers and take ownership of systems from design to production.\n\nYour work will directly shape how natural, responsive and reliable JustCall's AI voice agents are. You'll solve some of the hardest challenges in real-time AI, where latency, conversation quality and system reliability directly impact customer experience.\nWhat we're looking for\n8+ years of software engineering experience, with meaningful hands-on experience building production-grade real-time or Voice AI systems.\n\nStrong programming skills in Python or Go, with a deep understanding of asynchronous programming, concurrency and backend architecture.\n\nHands-on experience building real-time streaming systems using WebSockets, WebRTC or gRPC.\n\nExperience working with streaming ASR, LLM and TTS systems, including integrating and optimising speech and language model providers.\n\nStrong understanding of voice fundamentals, including audio streaming, VAD, endpointing, turn-taking and interruption handling.\n\nExperience with telephony protocols such as SIP, RTP and WebRTC, and debugging real-time media issues.\n\nStrong understanding of distributed systems, system design, scalability and fault tolerance.\n\nExperience building and operating highly available backend services in production.\n\nFamiliarity with AWS/GCP, Docker, Kubernetes and observability tools.\n\nAbility to own architecture, drive technical decisions and mentor engineers without formal authority.\n\nEdges that help\nExperience building production Voice AI agents or conversational AI products.\n\nHands-on experience with frameworks such as LiveKit, Pipecat, Vocode or similar.\n\nExperience with telephony platforms, CPaaS providers, SIP infrastructure or media servers.\n\nExposure to speech processing, audio DSP, noise suppression or speaker diarization.\n\nExperience with self-hosted model serving and inference optimisation.\n\nExperience building automated evaluation frameworks for voice agents.\n\nFamiliarity with contact-centre platforms, IVR, dialers or CCaaS products.\n\nHow we work\nSmall teams, real ownership: Own systems end-to-end, from architecture to production.\n\nShip and measure: Use latency, quality and reliability metrics to drive engineering decisions.\n\nEngineering-first: Focus on solving complex problems, writing clean code and building for scale.\n\nWrite it down: Design documents and technical reviews guide how we build.\n\nWork where the work is: Based in Noida or Bangalore, working closely with product and engineering teams.\n\nPay for impact: Market-benchmarked fixed pay with variable and equity as JustCall scales toward $100M ARR.\n\nThe bigger picture\nJustCall is SaaS Labs' flagship product, used by 6,000+ businesses across 70+ countries to run their customer conversations. Backed by Peak XV and Base10 Partners, we've crossed $40M ARR and are building toward $100M.\nIf building the next generation of AI-powered conversations excites you, let's talk.\nSaaS Labs is an equal opportunity employer. We believe diverse teams build better products and make employment decisions without discrimination based on race, colour, religion, national origin, age, sex, marital status, ancestry, disability, genetic information, veteran status, gender identity, sexual orientation or any other protected characteristic.","description_format":"text","description_chars":5104,"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":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Custom Software Development","Consumer & Utility Software"],"lifecycle":[{"event":"open","at":"2026-11-11T08:55:50Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":7,"reasons":["conf:1","win:early"],"computed_at":"2026-11-11T10:12:56Z"},"pay":null,"html_url":"https://alion.io/job/saas-labs-sde-4-voice","json_url":"https://alion.io/job/saas-labs-sde-4-voice.json","meta":{"generated_at":"2026-11-11T10:12:56Z","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":17366,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":6502},"rest":"https://alion.io/mcp/rest/get_company?id=6502"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsaas-labs-sde-4-voice"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fsaas-labs-sde-4-voice"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fsaas-labs-sde-4-voice"},{"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/saas-labs-sde-4-voice\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsaas-labs-sde-4-voice"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4061695}},{"tool":"search_jobs","arguments":{"company":"saaslabs.co","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4061695},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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