Role Description We are looking for an exceptional Senior Software Engineer (Search / Retrieval) to join our growing team. In this role, you will lead the design, development, and optimization of intelligent search systems that leverage machine learning at their core. You’ll be responsible for building end-to-end retrieval pipelines that incorporate advanced techniques in query understanding, ranking, and entity recognition. The ideal candidate combines deep expertise in information retrieval and search relevance with hands-on experience applying machine learning to real-world search problems at scale. You will also be responsible to: - Lead the development of advanced search clusters that can scale to millions of documents across customers and data sources. - Deploy learning-to-rank models that optimize relevance using behavioral signals, embeddings, and structured feedback. - Build and scale robust Entity Recognition pipelines that enhance document understanding, enable contextual disambiguation, and support entity-aware retrieval. - Architect next-gen search infrastructure capable of supporting highly dynamic document corpora and real-time indexing. - Drive improvements in query construction, indexing, and search performance. - Be up-to-date with the latest improvements in search and indexing technologies. - Collaborate with product and applied research teams to translate user needs into data-informed search innovations. - Produce clean, scalable code and influence system architecture and roadmap across the relevance and platform stack. Qualifications - Bachelors/Masters/PhD degree in Statistics, Mathematics or Computer Science, or another quantitative field. - 7+ years of backend engineering experience with 3+ years in search, information retrieval, or related fields. - Strong proficiency in Python. - Hands-on experience with search engines (Opensearch or Elasticsearch). - Strong understanding of information retrieval concepts spanning traditional methods (TF-IDF, BM25) and modern neural search techniques (vector embeddings, transformer models). - Experience with text processing, NLP, and relevance tuning. - Experience with relevance evaluation metrics (NDCG, MRR, MAP). - Experience with large-scale distributed systems. - Strong analytical and problem-solving skills. Requirements - Strong communication abilities to explain technical concepts. - Collaborative mindset for cross-functional teamwork. - Detail-oriented with strong focus on quality. - Self-motivated and able to work independently. - Passion for solving complex search problems.

Title: Senior Software Engineer, Fullstack (UK) Location: Remote - UK Type: Full-time Workplace: remote Category: Product Engineering Job Description: Who We Are At Firstup, our mission is to improve the employee experience at every moment that matters, large and small. As the communication pipeline for the world's workforce, we now serve 40 of the Fortune 100 companies, reaching and connecting more than 17 million employees daily. Our employees are experts in the employee experience, workforce communications and technology. Joining Firstup means joining a movement to make work better for every worker. As the world’s first intelligent communication platform, Firstup meaningfully engages employees at every moment from hire to retire, and delivers engagement insights to help companies support, promote and retain their talent. Our movement has taken root and is evident in our world-class customer base. Now we need your help. Ready to make a difference in the world? Job Summary The Sr. Software Engineer will join the team responsible for Firstup's public APIs, Agentic tools, third-party integrations with enterprise systems such as HRIS platforms, and shared platform services. You will deliver innovative, scalable solutions while constantly improving our approach to architecture, scale, availability, and fault-tolerance. You are an active user of Generative AI tools and coding agents, applying them daily to accelerate delivery and improve code quality. Responsibilities - Design, build, and maintain public-facing APIs and Agentic tools that enable enterprise customers to integrate with and extend the Firstup platform. - Develop and own integrations with external enterprise systems, including HRIS platforms such as Workday, SAP SuccessFactors, and Dayforce. - Build and maintain shared platform services used across the wider engineering organisation. - Write high-quality code (reliable, readable, efficient, testable, scalable, maintainable), provide thorough code reviews, and create comprehensive tests and documentation. - Apply broad, in-depth knowledge to develop and maintain large-scale multi-tenant services in the cloud. - Actively use Generative AI tools and coding agents in day-to-day workflows to improve code quality and accelerate delivery. - Collaborate across teams on industry standards and best practices to help others solve complex problems. - Design future-ready solutions and address architectural gaps using modern microservices and cloud-native patterns. - Own production health for your services, contributing to on-call rotations, incident response, and post-incident reviews in a "you build it, you run it" environment. - Identify, analyse, and resolve system availability, reliability, and performance issues, contributing to observability and resiliency improvements. - Partner with Product Management and Design to translate business requirements into scalable technical solutions. Minimum Qualifications - Bachelor's degree in Computer Science or related field, or equivalent experience. - 5+ years building reliable, performant applications and microservices. - Strong proficiency in TypeScript and Node.js. Ruby experience is a plus. - Proven full-stack experience across frontend (React.js), backend, and database layers. - Technical depth in at least one specialisation: networking, security, serverless, event streams, or similar. - Strong AWS experience, including compute, storage, networking, and monitoring. - Excitement to build beautiful, intuitive products with a strong customer focus. - Innate curiosity and a desire to learn and teach. Preferred Qualifications: - Experience building and maintaining integrations with HRIS platforms such as Workday, SAP SuccessFactors, Dayforce, or similar enterprise HR systems. - Experience with Kubernetes, Docker, and Helm. - Experience with Datadog or similar observability and monitoring platforms. - Demonstrated use of Generative AI tools or coding agents in development workflows. - Experience in enterprise SaaS organisations, particularly HR Tech or regulated domains. - Familiarity with ML/AI integration in production systems. - Open-source contributions or a history of side projects. Why Firstup? Because you care - about people, the work you do, and the connections you make. Work is such a large part of life; it only makes sense to make it awesome. If you want to engage brilliant minds in a high-growth and inclusive environment where ideas are rewarded regardless of who they come from, join us. This is a rapidly changing space so if you thrive on ambiguity, are hungry for a challenge, and have the guts to speak your mind, you could be a perfect fit. We offer an excellent PTO program, great health benefits, a casual and friendly environment, remote work, and a leadership team who truly believes in your growth – both personally and professionally. Firstup is committed to providing equal employment opportunities to all applicants for employment and to all employees, without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, protected disability, veteran status, or any other protected status in accordance with applicable federal, state or local laws. #LI-TM1 #LI-Remote

Role Description ProNexus is recruiting for a fast-growing, pre-Series A AI startup building high-stakes AI infrastructure for trial attorneys. The company is developing agentic software that helps litigation teams research, draft, cite-check, analyze case documents, and produce reliable legal work where accuracy is critical. This is a Founding Engineer role on a very small engineering team. You’ll work across frontend, backend, AI systems, integrations, and agent architecture. The right person is a true full-stack builder who can move quickly, use AI tools effectively, and still deeply understand and audit everything they ship. You’ll own polished product surfaces while also going deep on LLM workflows, RAG pipelines, orchestrators, sub-agents, tool-use patterns, and evaluation loops that make AI output reliable enough for legal work. What You’ll Do: - Build and ship features across the full stack, including React, Next.js, TypeScript, Python, SQL, and AI infrastructure. - Own frontend craft for the company’s primary AI interface, with a focus on speed, usability, and polished product execution. - Develop and maintain AI-powered features such as document extraction, RAG pipelines, agent orchestration, sub-agent workflows, eval loops, and anti-hallucination scaffolding. - Take ownership of third-party integrations such as legal software, CRMs, document systems, and other customer-facing tools. - Build and improve backend systems for reliability, performance, and scale. - Work closely with the founders and a small engineering team to scope, build, ship, and iterate quickly. - Use tools like Claude Code, GPT, and other AI development workflows to move faster while carefully reviewing and understanding generated output. Qualifications - 3+ years of experience shipping production software across frontend and backend. - Strong full-stack ability with React, Next.js, TypeScript, Python, SQL, and modern web development. - Experience building or shipping LLM-powered products in production. - Hands-on experience with agent workflows, RAG, evals, tool-use patterns, orchestration, or similar AI infrastructure. - Early-stage startup experience, founding engineer experience, or experience working in a high-ownership engineering environment. - Strong product instincts and ability to move between UX, backend systems, integrations, and AI architecture. - Ability to work autonomously, communicate clearly, and take projects from idea to production. - Bachelor’s degree in Computer Science or a related technical field preferred. Requirements - Experience in legal tech, litigation software, regulated industries, or domains where correctness and reliability are critical. - Portfolio, GitHub, or side projects showing agent pipelines, RAG systems, eval loops, AI workflows, or production LLM applications. - Active interest in cutting-edge AI tooling such as Claude Code, Codex, MCP, agent frameworks, orchestration, and eval-driven development. - Prior founding engineer, early CTO, or ex-founder background. - Experience at AI-native startups, legal AI companies, or early-stage companies building with LLMs. Benefits - Competitive compensation. - Meaningful early-stage equity. - Opportunity to help shape a company before Series A.

• Develop and maintain responsive WordPress sites with clean, efficient code. • Build custom themes, plugins, and **admin interfaces for non-developers** to easily update logos and content. • Manage **QA/staging environments** and integrate **bug monitoring tools** for quick issue detection. • Implement **Ticketmaster API integration** to enable dynamic “Buy Tickets” buttons with tracking. • Integrate **click-through tracking and analytics** for marketing attribution. • Ensure SEO best practices, GEO-targeting, and cross-browser compatibility. • Collaborate with design, marketing, and partners to align site updates with campaigns. • Monitor site performance during key events and keep all branding assets up to date.