Join a high-performance team building the next generation of software development tools. Moving beyond simple coding agents, you will design and build an agent-native platform that integrates traditional agile processes with AI. You will have a deep impact on product architecture, culture, and quality as the company transitions out of private beta.
Software Engineer at AI-native SDLC automation startup
Are you ready to build the future of software development? This London-based startup is moving beyond simple coding assistants to create an agent-native SDLC platform. As an early engineer, you will design the technical architecture and build high-impact product features using Python and React. If you thrive on ambiguity and want to leverage LLMs to redefine how software is built, this is the role for you.
Overview
Role overview
Company
Rezonant
London-based AI startup accelerating the SDLC through agent-native development
Backed by General Catalyst, First Minute Capital, Stem AI.
Responsibilities
What you will do
- Design, conceptualize, and build product features from the ground up using Python, React, Next.js, and Temporal.
- Develop and optimize agentic workflows, implementing evals and leveraging LLM tools like Langgraph and Claude CLI to increase velocity.
- Collaborate directly with the founding team and early adopters to validate features and iterate rapidly based on real-world feedback.
Candidate profile
Who this is a fit for
- Has 2+ years of professional software engineering experience with a strong degree in CS, AI, Math, or Physics.
- Possesses a philosophical belief in AI-native development and proficiency in building LLM-based applications including RAG and prompt engineering.
- Demonstrates a strong product mindset with the ability to lead cross-disciplinary teams and a desire to create beautiful user experiences.
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What makes it remarkable
Why this role is remarkable
- Shape the future of the SDLC by building agent-native systems that enable traditional companies to achieve 10x development velocity.
- Join an elite, high-performance culture that values deep intellectual curiosity, bottoms-up innovation, and rapid execution in an ambiguous environment.
- Gain massive ownership at a critical growth phase as the company exits private beta, directly influencing the technical architecture and product direction.
Jack & Jill
How Jack & Jill work together
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.