Overview

Equals One Ltd Providing Fixed Fee Advertising Solutions across premium job boards since 2009

Senior Software Engineer

Competitive salary dependent on skills and experience and potential for equity participation

Remote – ideally commutable to Leeds and London when required - BASED IN THE UK

Full Time

Handshaik is streamlining business development for dealmakers.

About Us

Handshaik is on a mission to transform how deals get done. Backed by significant scale-up funding (7-figure+ GBP) and already validated by leading industry organisations, we’re building the AI-powered platform for modern dealmakers.

We’re a fast-growing, venture-backed start-up where ideas move quickly from concept to product. Our technology spans backend, frontend, data, and AI, giving our team real scope to shape the future of the product and the company itself. If you’re excited by solving complex problems end-to-end, working in a collaborative environment, and having a tangible impact, you’ll feel at home here.

The Role

As a Senior Software Engineer, you will work within the development team to help shape the technical vision. This is a hands-on role that requires deep technical expertise, entrepreneurial drive, and the ability to create a scalable solution, from prototype to production. You’ll have the opportunity to build the product from the early stages, solving real customer problems, and playing a key role in the company’s journey towards achieving its business milestones.

Responsibilities (including but not limited to):

• Backend development: Design, build, and maintain APIs and services using Python (FastAPI), integrating with AI models and data platforms.
• Frontend development: Deliver responsive, performant, and accessible user interfaces with React/Next.js.
• AI integration: Implement and maintain connections to LLMs and ML services (OpenAI, AWS Bedrock, etc.), supporting prompt design, embeddings, and vector database integration.
• Data engineering: Work with structured and unstructured datasets, build ingestion and transformation pipelines, and design efficient database schemas (Postgres/NoSQL).
• Architecture & Design: Contribute to technical decisions across the stack, designing modular and scalable solutions.
• Code quality: Champion best practices in testing, code reviews, CI/CD, and documentation.
• Collaboration: Partner with product managers, the engineering team and ELT; mentor junior developers.
• Innovation: Research and recommend new tools, frameworks, and approaches for full-stack and AI development.
• A passionate individual that’s hardworking and dedicated, with an entrepreneurial/ownership mindset, strong communication skills and a team player
• 5+ years of professional experience in full-stack development.
• Strong proficiency in Python (FastAPI) and React/Next.js.
• Solid experience with SQL and NoSQL databases (e.g., Postgres, DynamoDB).
• Experience working with AI/ML models and APIs (LLMs, embeddings, vector search).
• Strong understanding of data engineering practices (ETL, schema design, performance tuning).
• Proficiency in cloud environments (AWS preferred) and containerised deployments (Docker, ECS).
• Strong grasp of secure coding practices and handling of sensitive data.
• Excellent communication, problem-solving, and leadership skills.

Note: Interested? If you feel that you possess the relevant skills and experience then please send your cv by return.

Seniorities & Employment

• Seniority level: Mid-Senior level
• Employment type: Full-time
• Job function: Information Technology
• Industries: Software Development

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