Haystack

About the Company

Discover Haystack - the UK's fastest growing tech hiring marketplace.

Driven by our award-winning mobile app and web platform, Haystack connects active and passive tech talent directly with hiring managers and talent acquisition teams.

We're trusted by over 150,000+ UK-based techies, working in Software Engineering, Data, Design, DevOps, Cloud, Tech Management, Testing, Product & Delivery, Architecture and more.

100s of employers from startups and scale-ups like Atom Bank, DuckDuckGo and Football Radar to established enterprises like American Express, Dunelm and Raytheon use Haystack to discover tech talent that they can't find anywhere else.

Listed Jobs

Company Name

Haystack

Job Title

Full Stack Engineer

Job Description

**Job Title:** Senior Full Stack Engineer (SVP) **Role Summary** Lead the development and operation of a financial analytics platform for regulatory stress testing and internal risk modeling. Design and deploy scalable data pipelines, build statistical and ML models, and collaborate with cross‑functional teams to ensure accuracy and performance. **Expectations** Produce reliable stress‑testing and credit‑loss models; deliver production‑grade data workflows; communicate results to both technical and non‑technical stakeholders; continuously improve platform performance and scalability. **Key Responsibilities** - Build and implement stress‑testing and credit‑loss models in Python or R. - Develop scalable pipelines for forecasting balance‑sheet, revenue, expenses, macro drivers, and risk metrics. - Coordinate model development, testing, documentation, and deployment across multiple teams. - Analyze model outputs, identify drivers of capital and loss movements, and validate performance. - Apply statistical techniques and machine learning to large financial datasets. - Create visual reporting tools using Python/JupyterHub. - Support platform expansion into higher‑performance compute environments and broader analytics applications. **Required Skills** - Advanced programming in Python or R (plus SQL and Pandas). - Strong knowledge of regression, time‑series analysis, model validation, and ML techniques. - Experience building production‑grade data pipelines or model execution workflows. - Ability to translate technical concepts for non‑technical audiences and collaborate across teams. - Familiarity with financial, risk, or statistical modeling. **Required Education & Certifications** - MSc, MBA, PhD, or equivalent in Computer Science, Mathematics, Engineering, Data Science, or related field. - Relevant certifications in data science, analytics, or programming are advantageous but not mandatory.

Manchester, United kingdom

Remote

25-11-2025

Company Name

Haystack

Job Title

AWS Developer

Job Description

Job Title: AWS Developer Role Summary Hands‑on developer responsible for building, maintaining, and scaling AWS‑hosted services—primarily Lambda functions and supporting backend components—for the Contact Centre Platform (CCP). Role emphasizes coding, secure architecture, and integration with Amazon Connect and AI‑driven features. Expectations - Deliver production‑ready Lambda functions in Node.js/TypeScript. - Enable AI, automation, and customer‑experience features within the CCP. - Collaborate across case‑management, infrastructure, and DevOps teams. - Ensure secure, scalable, and reliable services that meet internal development standards. - Participate in route‑to‑live and deployment activities for new platform capabilities. Key Responsibilities - Design, code, and deploy AWS Lambda functions and associated backend services. - Develop and iterate on features across the Amazon Connect ecosystem. - Support route‑to‑live processes for platform enhancements. - Implement secure coding practices and DevSecOps principles. - Coordinate with infrastructure and case‑management teams for seamless integrations. - Diagnose, optimize, and maintain AWS‑hosted services for performance and reliability. - Apply DevOps concepts where applicable (CI/CD pipelines, automated testing). Required Skills - Strong experience building AWS Lambda functions (proficiency in Node.js/TypeScript). - Familiarity with Amazon Connect and deployment of AI models on AWS. - Secure coding mindset and basic DevSecOps knowledge. - Experience with CI/CD tools (GitHub Actions, Jenkins). - Eligible for SC Clearance. - Nice to have: - Terraform or other IaC tooling. - Salesforce Service Cloud Voice integrations. Required Education & Certifications - Bachelor’s degree in Computer Science, Engineering, or related discipline. - AWS Certified Developer – Associate (or equivalent AWS certification).

United kingdom

Remote

30-11-2025

Company Name

Haystack

Job Title

Data Intern

Job Description

Job Title: Data Intern Role Summary: Undergraduate placement in Clinical Data and Information Sciences providing hands‑on experience in clinical trial data collection, review, and management. Supports database design, testing, validation, and implementation of data collection tools (CRF and non‑CRF) using EDC systems. Contributes to Trial Master File documentation, data cleaning, visualization, and metrics reporting while adhering to SOPs and regulatory requirements. Expactations: • 12‑month placement starting 1 Sept 2026. • Full participation in clinical data review, query management, and operational excellence activities. • Ability to learn and apply data systems, visualization tools, and regulatory guidelines. • Collaboration across cross‑functional teams to maintain high‑quality outcomes. Key Responsibilities: - Participate in clinical data review and query management for the clinical portfolio. - Assist with database design, documentation, testing, validation, and implementation of CRF/non‑CRF tools in EDC or similar systems. - Support Trial Master File (TMF) documentation ensuring quality and compliance. - Conduct data cleaning, visualization, metrics reporting, and submission‑related tasks. - Apply SOPs and regulatory requirements consistently. - Collaborate with functional teams to understand and contribute to data management processes. Required Skills: - Fundamental understanding of clinical development and pharmaceutical regulatory environment (e.g., FDA, Health Canada). - Basic knowledge of clinical data management principles and processes. - Awareness of MedDRA/WHO‑Drug terminology (preferred). - Proficiency in Microsoft Office (Excel, Word, Outlook). - Willingness and ability to learn data systems and visualization tools (Spotfire, J‑Review). - Excellent verbal and written communication skills. Required Education & Certifications: - Current UK university student completing a placement (Year in Industry, Industrial Placement, or Gap Year). - Degree in Health Sciences or Technology (preferred). - 0–2 years of university‑level experience in data management or related projects.

London, United kingdom

Hybrid

Fresher

01-12-2025

Company Name

Haystack

Job Title

Data Scientist

Job Description

Job Title: Senior Manager, Data Science & AI Role Summary: Lead the development and implementation of AI/ML solutions to drive commercial strategy across international markets, acting as a strategic partner to CMO and Business Technology leaders and orchestrating cross‑functional collaboration within a global AI POD. Expactations:  - Own end‑to‑end AI/ML delivery from problem definition to insight communication. - Shape and execute the International AI roadmap, advocating AI fluency and adoption in key EU markets. - Translate advanced analytics into clear, business‑impactful recommendations. Key Responsibilities: • Build and deploy predictive models, algorithms, and AI‑driven tools supporting commercial objectives. • Design solutions, conduct modelling, and present findings to commercial and leadership audiences. • Develop stakeholder relationships across Commercial, Medical, Operations, Digital, and in‑market DS teams. • Collaborate with Analytics Engineering to maintain optimal data ecosystems. • Pilot, scale, and integrate innovative data science tools using agile methods. • Foster AI culture and promote data‑driven decision making within the organization. Required Skills: - Advanced proficiency in Python, R, Java, or Scala. - Experience with AWS, big‑data platforms (Hadoop, Snowflake, Databricks), SQL/NoSQL. - Familiarity with LLM models and visualization tools (Tableau, Dash, Angular). - Strong consulting‑style communication, stakeholder management, and insight‑storytelling. - Project management and collaborative leadership in an international environment. - Ability to navigate ambiguity, manage multiple priorities, and exhibit a growth mindset. Required Education & Certifications: - Bachelor’s degree in Engineering, Economics, Statistics, Computer Science, Mathematics, or related field. - Advanced degree (MS, PhD, MBA) preferred.

London, United kingdom

Hybrid

07-12-2025