Sydney, New South Wales, Australia · Hybrid
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New RelicSydney, New South Wales, Australia · Hybrid
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Sydney, New South Wales, Australia · Hybrid
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Sydney, New South Wales, Australia · Hybrid
LAB3 is one of the largest Azure engineering practices in the Australasia region with a focus on Cloud & DevOps, Data, IoT & AI, Modern Workplace, Security, and Network services. We have an exciting new permanent role fo…
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Sydney, New South Wales, Australia • Hybrid
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Design, build, and operate large-scale search systems while driving relevance and retrieval quality across the stack. Lead search architecture initiatives, including hybrid retrieval and AI-native applications, while mentoring team members and maintaining high engineering standards.
Requires deep expertise in lexical and semantic search, including hands-on experience with RAG and large-scale multi-tenanted architectures. Candidates should be proficient with OpenSearch or Elasticsearch and possess strong systems thinking skills to solve complex architectural challenges.
Mitti by SafetyCulture is a global tech company, just not the kind you're picturing. Our almost 1,000-person team builds tools that make work better for the three billion frontline workers who keep the world moving. We've got big tech scale, without the sign-off layers or corporate theatre. Every permanent team member gets equity, so when we grow, you do too. This next chapter is about scaling smart, powered by AI, a clear vision and real ownership.
Big tech impact, without the big tech ick.
Our mission and your opportunity is to help solve the challenges faced in an increasingly distributed workforce. In short, to shape Engineering excellence, nurture emerging Engineering talent and build out an inclusive, high-performing interdisciplinary team.
As a Senior Software Engineer, you'll be empowered to manage complex architectural decisions and drive change. You'll own the delivery of practical solutions to solve real-world problems for customers, with the knowledge that what you build has an immediate positive impact. For this role we're specifically looking for someone who has built large scale multi-tenanted search systems.
You'll face exciting technical challenges as we scale, and be an integral part of the engineering team. High-performing teams here own their services, and you're trusted to build and run a system that serves millions of users while transforming it into a system that will serve tens of millions of users in the near future. We empower engineers to learn new skills and use technology to solve customer problems, including initiatives in IoT, machine learning, and event-driven architecture.
This role is part of our Best Fit job match program. We have a variety of Software Engineering roles, by applying to this role will be considered for multiple roles across our engineering teams. We want to set you up for success in your role so we assess your capabilities and then match you up to the best team.
Design, build and operate large-scale search across front end and back end, in a stack of React, TypeScript, Golang, PostgreSQL and OpenSearch running on AWS.
Own the search relevance and retrieval-quality. Define how relevance is measured, then drive it up through ranking, query pipelines, and tuning.
Lead search architecture: indexing strategy, hybrid retrieval (combining lexical text search with semantic/vector search), embeddings, and ranking, including the trade-offs each involves.
Build AI-native applications, connecting retrieval to LLM-powered experiences (e.g. RAG), and stay at the bleeding edge of agentic coding tools.
Provide technical leadership guiding search architecture, execution, and cross-functional collaboration to deliver impactful outcomes.
Own search feature delivery end-to-end: breaking down requirements with stakeholders, partnering with Product and Design, supporting other engineers, and ensuring successful delivery.
Articulate effort-vs-impact trade-offs, including build-vs-buy decisions.
Keep search operable at scale, performance, observability, and cost as data volume grows.
Drive high-performance team outcomes by setting rigorous engineering standards, mentoring peers, and improving team practices for quality, velocity, and collaboration.
Demonstrate Mitti's values (Think Customer; Open, Honest, Always; Better as a Team; Be Bold, Bring Action).
Deep search / information-retrieval expertise: lexical text search (inverted indexes, BM25-style ranking), semantic and vector search (embeddings, approximate nearest-neighbour), hybrid retrieval, and relevance tuning.
Hands-on with RAG: chunking, retrieval pipelines, grounding model outputs, and evaluating retrieval quality.
Proven track record building search capability into new or existing applications that retrieve information at scale in a multi-tenanted architecture.
Strong OpenSearch / Elasticsearch operating experience at scale, including how segment merging works and the operational challenges that architecture presents.
A systems thinker who decomposes large problems into small ones and teaches less experienced engineers to do the same.
Works autonomously and is comfortable making the call without waiting on sign-off; co-owns technical and product direction rather than building to someone else's spec.
Influences where the product goes, not just how it gets built.
Thrives in a small team at a fast pace, comfortable with little formal process and structure.
If you have used turbopuffer in production before, let us know!
Equity with high growth potential, and a competitive salary
Flexible working arrangements
Access to professional and personal training and development opportunities
Hackathons, Workshops, Lunch & Learns
In-house Culinary Crew serving up daily breakfast, lunch and snacks
Barista coffee machine, craft beer on tap, boutique wines and a range of non-alcoholic beverages
Wellbeing initiatives such as EAP services and generous parental leave policy
Quarterly celebrations and team events
On-site gym, table tennis, board games, books library, and pet-friendly offices
We’re committed to building inclusive teams and cultivating a sense of belonging so our people can bring their whole authentic selves to work each day. We seek to make reasonable adjustments throughout our recruitment process to create an even playing field for all candidates. Thanks to the tireless efforts of the entire Mitti team we’ve built an incredible culture which has seen us recognised as a Best Place to Work in Australia , the US and the UK .
Even if you don't meet every requirement listed in the ad, please consider applying for this role. We prioritise inclusion and value individuals with potential over a checklist of qualifications. Don't rule yourself out, hit that apply button if this job resonates with you
You can find out more about life at Mitti via Youtube , Twitter , Instagram and LinkedIn.
To all recruitment agencies, we do not accept resumes or partnership opportunities. Please do not forward resumes to Mitti or any of our employees. We are not responsible for any fees associated with unsolicited resumes.
The way the world works.
SafetyCulture is now Mitti, the operations system for every site, shift and standard. Trusted by over 80,000 organisations, Mitti brings your people, operational data and workflows into one operating picture. From the frontline to the boardroom, it gives everyone a clear understanding of what’s happening, highlights what needs attention and recommends what to do next. Every inspection completed, issue raised and action taken becomes intelligence your teams can use to improve every day. Mitti. The way the world works
Offices: 72 Foveaux St, Surry Hills, New South Wales 2010, AU · 2114 Central St, Kansas City, Missouri 64108, US · 12 Lever Street, Manchester, England M1 1LN, GB · 27F SM Aura Tower, 26th Street, corner McKinley Pkwy, Metro Manila, Taguig City, Metro Manila, PH
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