Lilt

Senior Full Stack Engineer

Lilt • $130K — $155K *
Enterprise Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 5+ years of full-stack software engineering experience with real-time systems
  • Strong backend skills in REST APIs and low-latency transport protocols
  • Proficient in building complex, stateful UIs using React/TypeScript
  • Experience integrating with third-party SDKs for collaboration platforms
  • Familiarity with ASR/MT/NLP pipelines or latency-sensitive ML systems
  • Ability to translate ambiguous product requirements into technical plans
  • Experience in handling diverse customer configurations and edge cases

Responsibilities

  • Own the architecture and technical roadmap for a new translation service
  • Architect and build a low-latency, N-way translation pipeline
  • Develop the live meeting experience integrating with existing platforms
  • Create a real-time interpreter workbench with advanced features
  • Design an event-driven correction and broadcast system
  • Collaborate with Product and Design to meet delivery dates
  • Establish testing and release practices for the new product line
  • Mentor and set engineering standards as the team scales

Benefits

  • Opportunity to work on cutting-edge real-time translation technology
  • Collaborative environment with cross-functional teams
  • Potential for career growth and mentorship opportunities
  • Involvement in shaping a new product line
  • Flexible work arrangements in preferred locations
Full Job Description
Senior Full Stack Engineer

Location & eligibility: This position requires US citizenship and residence in the United States. Preferred locations are Washington, D.C.; Boston, MA; and Indianapolis, IN.
What You'll Do
  • Own architecture and technical roadmap for this Converse expansion, spanning the central real-time translation service and the customer-facing surfaces built on it (live meeting UI, interpreter workbench)
  • Architect and build the low-latency, N-way translation pipeline: per-participant audio ingestion, diarization, streaming ASR, MT orchestration, and result fan-out to every language in the meeting
  • Build the live meeting experience - bot/agent participant, meeting side panel, and on-stage caption surfaces - integrating with the host meeting platform's SDK, extension framework, and APIs
  • Build the interpreter workbench: a real-time, streaming adaptation of Lilt's CAT tool with a live segment queue, low-confidence flagging, TM/TB matches, AI-Review/AI-QA signals, and submit-to-broadcast corrections
  • Design the event-driven correction and broadcast system - routing flagged segments to the correct on-call interpreter by language, pausing the affected translation, and isolating each correction to a single language
  • Partner with Product and Design to turn PRD requirements (JTBD, feature specs) into technical designs, and commit to and hit delivery dates on a brand-new product surface
  • Collaborate with the engineers already building Converse's device/mobile experience to extend a shared translation-service architecture (per-participant declared spoken/received languages) into new multi-device and platform form factors
  • Establish testing, CI/CD, and release practices (GitHub Actions, automated e2e tests) for the new product line
  • Help recruit, mentor, and set engineering standards as headcount scales on this initiative
What We're Looking For
Required
  • 5+ years of professional full-stack software engineering experience, with a track record of owning complex, real-time or streaming systems end-to-end - architecture, implementation, deployment, and production reliability
  • Strong backend experience spanning REST API endpoints and real-time/streaming systems: WebSockets, gRPC, or comparable low-latency transport; event-driven architectures; message routing and state management across many concurrent sessions
  • Strong frontend experience building complex, stateful, real-time UIs in React/TypeScript - live-updating multi-pane interfaces, collaborative editors, or comparable dashboards
  • Experience integrating with third-party platform SDKs or extension frameworks (Slack, Zoom, or similar meeting/collaboration platforms) - bots, side panels, webhooks, and platform APIs
  • Comfort working with or directly adjacent to ASR/MT/NLP pipelines, or other latency-sensitive ML-in-the-loop systems
  • Demonstrated ability to scope ambiguous, 0-to-1 product requirements into a technical plan and commit to and hit delivery dates
  • Experience building validation and guard logic that gracefully handles edge cases across diverse customer configurations - languages, device counts, network conditions
  • US citizenship and residence in the United States
Strong Plus
  • Experience with speech/audio pipelines: diarization, streaming speech recognition, or audio stream multiplexing
  • Prior experience building CAT tools, translation memory/termbase systems, or other linguist-facing review interfaces
  • Familiarity with localization/TMS workflows: XLIFF, Translation Memory, MT vs. human translation pipelines
  • Experience with cross-platform, embedded, or mobile-adjacent architectures, and adapting shared services across device and web form factors
  • Experience shipping in regulated or high-security customer environments
Bonus
  • Hands-on Microsoft Teams app or bot development specifically (Teams Toolkit, Bot Framework, Azure Communication Services, Microsoft Graph)
  • Experience mentoring engineers and setting technical standards for a new product line
  • Familiarity with post-meeting asset generation: transcript export formats (TXT/WebVTT/JSON), recording citations, and summarization

About Lilt

Industry
Founded
2015

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