Senior Software Engineer Agentic Assistant

Remote Jobs; United Kingdom; Remote; GBP 128,000 - 140,000; Full time

Job summary

A leading safety technology platform in the United Kingdom is seeking a Senior Software Engineer to develop a conversational AI assistant. The ideal candidate will have strong skills in TypeScript and Node.js, and experience with cloud infrastructure. This is a unique opportunity to influence product direction and enhance investigative workflows while working with a collaborative team. The role offers a competitive salary and rich benefits including fully paid health benefits and flexible PTO.

Benefits

Flexible PTO

Fully‑paid health benefits

Family Leave

Fertility & Family Benefits

Mental health benefits

WFH Stipend

Productivity Stipend

Home Office Stipend

Qualifications

• Love for coding and continuous learning in the LLM space.
• Strong problem‑solving mindset.
• Hands‑on LLM experience including APIs and context management.

Responsibilities

• Design and implement the conversational interface.
• Develop backend orchestration for managing LLM interactions.
• Lead product impact by developing critical features.

Skills

TypeScript

Node.js

Express

React

OpenAI API

PostgreSQL

Docker

Kubernetes

Product mindset

API design

Tools

AWS

Terraform

Job description

Who is Flock?

Flock Safety is the leading safety technology platform, helping communities thrive by taking a proactive approach to crime prevention and security. Our hardware and software suite connects cities, law enforcement, businesses, schools, and neighborhoods in a nationwide public‑private safety network. Trusted by over 5,000 communities, 4,500 law enforcement agencies, and 1,000 businesses, Flock delivers real‑time intelligence while prioritizing privacy and responsible innovation.

We’re a high‑performance, low‑ego team driven by urgency, collaboration, and bold thinking. Working at Flock means tackling big challenges, moving fast, and continuously improving. It’s intense but deeply rewarding for those who want to make an impact.

With nearly $700M in venture funding and a $7.5B valuation, we’re scaling intentionally and seeking top talent to help build the impossible. If you value teamwork, ownership, and solving tough problems, Flock could be the place for you.

The Opportunity

We’re hiring a Senior Software Engineer to build Night Shift, a conversational AI assistant that helps investigators surface critical evidence and close cases faster. You’ll design and implement the conversational interface, build the orchestration backend that manages LLM interactions and tool calling, and develop integration pipelines connecting our AI to Flock’s existing data platform and APIs.

This is a ground‑floor opportunity where product thinking matters as much as technical execution: you’ll shape chat experiences with complex context management, partner with platform teams to design new APIs or leverage existing ones, and solve the reliability challenges of deploying AI in high‑stakes investigative workflows. You’ll collaborate closely with ML engineers on prompt engineering and agentic workflows while maintaining a strong point of view on what makes a great user experience.

If you’ve built LLM‑powered products and thrive at the intersection of customer impact and technical depth, this role is for you.

Skillset

• Love for coding and continuous learning, especially in the rapidly evolving LLM space.
• Resourceful problem‑solver mindset: excel in ambiguous situations and take initiative to define product direction.
• Strong TypeScript / Node / Express skills for web services and API design (REST, SSE, WebSockets for streaming).
• Modern web framework expertise (React / TypeScript preferred), particularly for conversational UI and chat interfaces.
• Hands‑on LLM experience: OpenAI/Anthropic/Gemini APIs, prompt engineering, streaming responses, and conversation context management.
• Familiarity with agentic patterns: function calling, tool use (MCP), and orchestrating multi‑step workflows.
• API integration skills: consume existing APIs or design new ones to ground AI in investigative data.
• Database confidence: PostgreSQL and sophisticated SQL for data retrieval.
• Cloud infrastructure basics: Docker, Kubernetes (Helm), AWS services (S3, SQS, API Gateway).
• Product‑minded: translate user feedback into technical requirements and make pragmatic tradeoffs.
• Bonus points for:
  • LLM evaluation tools (LangSmith, Langfuse)
  • Vector search/RAG
  • Microservices architecture
  • Terraform

90 Days at Flock

The First 30 Days

• Onboard and Integrate:
  • Familiarize yourself with Flock’s mission, investigative workflows, and how customers use our platform today.
  • Pair with engineers across Cloud Software and ML teams to understand existing APIs, data models, and system architecture.
  • Build relationships with key stakeholders to understand their capabilities and constraints.
  • Meet with members of:
    • Machine Learning (agentic systems, model serving)
    • Data Engineering (investigative datasets, pipelines)
    • Platform teams (APIs, infrastructure)
    • Product and Design (customer needs, UX direction)
• Ship Early and Learn:
  • Complete a first‑day push to production.
  • Pick up initial sprint tickets: bug fixes, small UX improvements, or API integrations.
  • Participate in customer feedback sessions to understand investigator workflows and pain points.

The First 60 Days

• Build the Foundation:
  • Deliver core conversational UI components and establish patterns for chat interfaces.
  • Implement backend orchestration for LLM interactions and tool calling.
  • Stand up observability for the AI system (logging, tracing, basic metrics).
  • Work with ML team to integrate agentic workflows and refine prompt strategies.
• Demonstrate Velocity:
  • Own end‑to‑end features that connect UI, backend orchestration, and data integrations.
  • Collaborate with Product to rapidly iterate based on early user testing.
  • Propose technical improvements to chat quality, performance, or reliability.

90 Days & Beyond

• Drive Product Impact: Lead development of a core Night Shift capability that demonstrably improves investigator efficiency.
• Represent the team in cross‑functional initiatives, balancing zero‑to‑one experimentation with engineering best practices.
• Establish patterns for testing and quality in an evolving AI product.
• Shape the Direction: Influence product roadmap through technical insights and customer feedback.
• Mentor team members on LLM integration patterns or full‑stack best practices.
• Own a domain area (e.g., conversation management, data grounding, streaming architecture).

Interview Process

We want our interview process to be a true reflection of our culture: transparent and collaborative. Throughout the interview process, your recruiter will guide you through the next steps and ensure you feel prepared every step of the way. To check out our interview stages and how you should prepare, visit experiences on our careers page.

Salary & Equity

In this role, you’ll receive a starting salary of $170,000‑$185,000 as well as stock options. Base salary is determined by job‑related experience, education/training, as well as market indicators. Your recruiter will discuss this in‑depth with you during our first chat.

The Perks

• 🌴 Flexible PTO: We seriously mean it, plus 11 company holidays.
• ⚕ Fully‑paid health benefits plan for employees: including Medical, Dental, and Vision and an HSA match.
• 👪 Family Leave: All employees receive 12 weeks of 100% paid parental leave. Birthing parents are eligible for an additional 6‑8 weeks of physical recovery time.
• Fertility & Family Benefits: We have partnered with Maven, a complete digital health benefit for starting and raising a family. Flock will provide a $50,000‑lifetime maximum benefit related to eligible adoption, surrogacy, or fertility expenses.
• 🧠 Spring Health: Spring Health offers a variety of mental health benefits, including therapy, coaching, medication management, and digital tools, all tailored to each individual’s needs.
• 💖 Caregiver Support: We have partnered with Cariloop to provide our employees with caregiver support.
• 💸 Carta Tax Advisor: Employees receive 1:1 sessions with Equity Tax Advisors who can address individual grants, model tax scenarios, and answer general questions.
• 💚 ERGs: We want all employees to thrive and feel like they belong at Flock. We offer three ERGs today – Women of Flock, Flock Proud, and Melanin Motion.
• WFH Stipend: $150 per month to cover the costs of working from home.
• 📚 Productivity Stipend: $300 per year to use on Audible, Calm, Masterclass, Duolingo, Grammarly and so much more.
• 🏠 Home Office Stipend: A one‑time $750 to help you create your dream office.

If an offer is extended and accepted, this position requires the ability to obtain and maintain Criminal Justice Information Services (CJIS) certification as a condition of employment. Applicants must meet all FBI CJIS Security Policy requirements, including a fingerprint‑based background check.

Equal Opportunity Employment

Flock is an equal‑opportunity employer. We celebrate diverse backgrounds and thoughts and welcome everyone to apply for employment with us. We are committed to fostering an environment that is inclusive, transparent, and collaborative. Mutual respect is central to how Flock operates, and we believe the best solutions come from diverse perspectives, experiences, and skills. We embrace our differences and know that we are stronger working together.

For assistance or an accommodation due to a disability, please email us at email protected. This information will be treated as confidential and used only to determine an appropriate accommodation for the interview process.