Top Software Engineer Jobs in New York City, NY

Lead technical execution as DreamLever’s first in-house engineer. Build and ship full-stack product improvements, improve the AI Chief of Staff agent, understand and extend the existing production system, and maintain reliable engineering foundations. Work closely with the founder on product decisions, coordinate external engineering support, review delegated work, and ensure fast, polished delivery.

Own the design and implementation of native iOS and Android SDKs supporting mobile device intelligence and fraud detection. Investigate complex systems-level engineering problems, evaluate platform behavior and technical tradeoffs, collaborate with Product, Engineering, Data Science, Fraud Intelligence, and Sales, and establish SentiLink’s mobile engineering capabilities.

Build Grow Therapy’s native Android app from the ground up as the founding Android engineer. Own architecture, developer tooling, testing, CI/CD, production releases, observability, security, and consumer-facing features. Set Android standards and technical direction while partnering with product, design, iOS, and backend teams. The role requires hands-on delivery, strategic decision-making with incomplete information, and preparation for a growing Android organization.

As a Forward Deployed Engineer, you will deploy solutions in customer environments, design integrations, customize AI workflows, troubleshoot issues, and translate feedback into product improvements.

The Founding Frontend/UX Engineer will design and develop user interfaces using modern web technologies, collaborating closely with AI engineers and co-founders to deliver a leading AI platform for life sciences.

You will own product features, develop high-quality user experiences, collaborate with teams, and iterate based on feedback in a regulated environment.

As a founding full-stack engineer, you'll design APIs, manage backend services, deploy LLM agents, and ensure compliance while collaborating with co-founders.

Build Ficus’s core payout infrastructure from the ground up, including beneficiary onboarding, account and payout workflows, internal tools, secure backend systems, and financial integrations. Own architecture and product decisions across frontend, backend, infrastructure, APIs, data models, security, observability, and compliance readiness. Collaborate directly with founders, customers, insurers, banks, vendors, and nontechnical stakeholders while translating ambiguous regulated-finance workflows into reliable products.

Join an early-stage company as a founding engineer, building backend services, user-facing applications, internal performance tooling, scalable data infrastructure, and shared organizational knowledge systems. You will partner with customers, deliver AI-driven applications from design through production, troubleshoot live systems, and help establish engineering culture and quality standards.

Build and maintain GTM infrastructure and automations (lead enrichment, routing, CRM workflows, dashboards). Ship growth experiments, enable sales tooling, run upsell motions, and translate CEO growth strategy into technical systems at founder speed.

Own and implement the backend runtime for real-time care coordination: encode executable SOPs, route issues to agents or humans, implement retries/fallbacks/timers, track session state, and integrate observability while collaborating with product and principal engineering to drive sessions to closure.

Early founding full‑stack engineer working with CTO and founders to build an AI-native litigation OS. Implement React/Next.js frontend, TypeScript backend, and Postgres data layers; design claim→element→fact→evidence schemas, entity-extraction pipelines, agent workflows to surface gaps, and evaluation loops that learn from attorney corrections. Collaborate directly with litigators; hybrid NYC role.

Join as a founding engineer building backend systems for an ambient AI scribe for nursing homes. Work on audio capture, transcription, vocal biomarker integration, automated clinical workflows, and set engineering standards. Collaborate in-person with founders to shape product and culture.

As a Founding AI Backend Engineer at Pakket, you'll enhance backend systems, debug the CV pipeline, and deploy services across warehouses, ensuring operational reliability and rapid feature deployment.

Build and own AI-powered software for real estate title and escrow operations. Responsibilities include creating property and transaction data systems, developing multi-agent workflows, integrating and evaluating AI systems, applying language models to property law, and automating closings, mortgages, documents, and payments. The role involves full-stack product ownership, technical decision-making, deployment, and close collaboration with attorneys, closing teams, operators, and the CTO.

Build and own the technical roadmap: design AI-first interfaces and APIs, architect scalable ETL pipelines, develop data models for ML features, ship autonomous B2B workflows (PO generation, vendor sync, schedule optimizations), and establish engineering standards, CI/CD, and mentoring.

Own enterprise customer onboardings from signed agreement through stable production launch. Integrate ERP and CRM systems, clean and reconcile messy financial data, ship production TypeScript integrations, improve AI agent prompts and evaluations, and convert customer learnings into product improvements and scalable onboarding playbooks. The role combines software development, customer-facing technical ownership, and building the company’s forward-deployed engineering function.

Own product features end to end, from researching freight agents’ workflows and defining solutions to designing interfaces, building APIs and data models, and shipping to production. The role requires full-stack development, strong product judgment, user research, rapid iteration, design-system ownership, and AI-first working practices. You will partner with product and engineering peers to build tools that make independent freight agents more effective.

As a Founding Engineer, you will own major product surfaces and contribute to AI search technology development at Petra Labs.

Serve as the primary engineer building PartnerAlly’s AI-native compliance platform. Own end-to-end product development across frontend, backend, infrastructure, compliance automation workflows, and AI/LLM integrations. Make pragmatic technical decisions, ship frequently, incorporate customer feedback, and help establish engineering culture while hiring future engineers.

Design and build the distributed systems layer powering a spatial computing platform: real-time coordination, persistent world state, APIs, AI platform infrastructure (vector search, retrieval, agent orchestration), and scalable services to support many concurrent users and third-party developers.

Lead Unity architecture and build persistent, multi-user spatial systems for mobile and wearables. Design spatial persistence, synchronization, AI-assisted content pipelines, and define long-term platform direction as a founding technical contributor.

As a founding full-stack engineer, design, build, and deploy core backend services, oracle/watchtower infrastructure, and borrower-facing applications. Integrate Bitcoin transactions, PSBTs, and Discreet Log Contracts, manage SQL/NoSQL databases, contribute to architecture decisions, and wear multiple hats in a fast-paced, early-stage environment.

Own a core product area from roadmap through production, making independent product decisions and working directly with users. Build conversational automation across voice, text, and email using frontend, backend, and Python real-time services. Establish architecture and quality standards for non-deterministic systems, including evaluation, versioning, safeguards, monitoring, and persistent conversation context. Release frequently within a small, co-located team.

Early senior engineer who will define technical direction, own core full-stack platform architecture, build AI-powered multi-modal systems (voice, text, email), make infrastructure and tooling decisions, mentor engineers, and work directly with customers to ship solutions quickly.