Senior AI/Agentic Engineer
Confirmed on the employer's own hiring board on Oct 3, 2026. First seen by Alion on May 18, 2026. Synthesized scores B on the Alion truth index.
About Us
It's hard to build a reliable system. It's harder to make sure that what you've built is really reliable.
Synthesized is redefining software testing. Our platform automates test data, test cases, and test environments - empowering enterprise teams to ship faster, reduce compliance risks, and modernise QA at scale.
We’re an ambitious VC-backed startup, having recently gone through Series A with leading global investors including redalpine, IQ Capital, Seedcamp, and Deutsche Bank. We have ambitious growth plans, and we are so keen for you to join us on the journey.
The Role
We are hiring an AI Engineer to help form the strategic direction of our agentic offering - turning vision into shipped, scalable systems.
This is a hands-on, builder-first role on our small applied-AI team. You'll work with our Product team to identify opportunities, scope them, and ship production-grade agentic capabilities integrated across our wider platform.
Stack & How We Work
Python, LangChain, Anthropic SDK, Pydantic, Docker
Spec-driven: product and tech specs live in Notion before code does
Benchmark-driven: every change scored against a golden-set rubric. Agents that demo well but regress under load don't ship
LangSmith for trace-driven debugging and agent observability
What You’ll Be Doing
Drive product direction for our agentic offering, in close collaboration with our Product team
Identify opportunities, scope them, and ship
We're looking for engineers who think like product builders, comfortable shaping the "what" as well as the "how"
Own the design, architecture, and implementation of agentic offerings, including:
End-to-end solution delivery
Integrations with wider ecosystems (partners/customers/platforms)
Drive prototypes through to production code, deployed alongside other Synthesized product offerings
Support partner/customer technical integration discussions where needed
Raise the bar for agentic systems engineering through the code you ship and the patterns you share with the team
About You
Proven experience in design, architecture, and implementation of agentic offerings, including complete solutions and ecosystem integrations
Built and shipped agents in production - tool/prompt design, framework tradeoffs, eval loops that catch regressions
Nice to have: experience in test data management, test automation, or QA tooling
Broader awareness of Software Quality Engineering is a supporting advantage
Comfortable operating in ambiguity
Demonstrated ownership and high velocity
What We Offer
Competitive salary & meaningful equity - so you share in our success
25 days annual leave + celebration days + your birthday off
Work From Anywhere - up to 1 month per year, fully flexible
Hybrid working - a mix of home and our London offices
Learning & development budget - for coaching, courses, and conferences
Private medical, dental & vision cover
Regular team socials & offsites - connect, celebrate, and recharge
A collaborative team - smart, ambitious, and supportive
Generous family leave - because life outside of work matters too
Equal Opportunities
We are committed to an inclusive and diverse workplace at Synthesized. Synthesized is an equal opportunity employer. We do not discriminate based on race, ethnicity, colour, ancestry, national origin, religion, sex, sexual orientation, gender identity, age, disability, veteran status, genetic information, marital status or any other legally protected status.