Full-Time

Software Engineer: Platform and Backend

Mid-career / Senior

Posted on 8/21/2026

Theia Insights

Theia Insights

1-10 employees

Data analytics platform delivering actionable insights

No salary listed

Cambridge, UK

Hybrid

Hybrid working is available from London or Cambridge.

Category
Software Engineering (1)
Required Skills
LLM
Pydantic
FastAPI
Python
React.js
TypeScript
Role-based Access Control
AWS
Pandas
Terraform
REST APIs

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Requirements
  • Strong production Python experience, including shipping and operating services.
  • Experience building HTTP APIs in a typed framework such as FastAPI, with schema and contract discipline.
  • Production AWS experience with S3, a compute service such as ECS/Fargate or Lambda, and a datastore using least-privilege IAM.
Responsibilities
  • Build and operate asynchronous REST endpoints using FastAPI and Pydantic to serve large datasets reliably and quickly.
  • Work with large tabular data in pandas, Parquet/Arrow, and DuckDB, managing memory and performance trade-offs when moving large datasets.
  • Own the identity and access layer, including AWS technologies for identity, authorization, and data distribution.
  • Design and build data access points such as APIs, analytical services, and MCP connectors.
  • Run services on AWS using infrastructure in AWS CDK shipped via CodePipeline.
  • Productionize code from the data and quantitative teams.
  • Occasionally contribute to TypeScript/React frontends that consume the API, particularly where a feature is simplest to own end to end.
  • Own reliability and performance end to end, including graceful handling of failure modes.
Desired Qualifications
  • Production authentication experience with OAuth2/OIDC, JWT validation, API keys, and scopes.
  • Experience with tabular data at scale using pandas plus Parquet/Arrow, ideally DuckDB.
  • Experience with multi-tenant SaaS, including role-based access control and API-key management.
  • Infrastructure as code using CDK in TypeScript or Terraform.
  • React/TypeScript experience or comfort working in a polyglot repository.
  • LLM or MCP integration and AI-facing tooling experience.
  • Financial-data or regulated-environment background.
  • Experience designing large-scale systems, owning authentication or multi-tenant access responsibilities, making cross-region and disaster-recovery trade-offs, and setting standards for a team.

Theia Insights provides data analytics and business intelligence services to help organizations make data-driven decisions, using a platform that collects, analyzes, and interprets large amounts of data for operations and marketing optimization. The platform gathers data from sources like user interactions, device details, and browser settings, then processes it and uses tools such as Google Analytics to study behavior and generate actionable insights. It differentiates itself by offering an integrated suite that combines multi-source data collection, analysis, and optional marketing services with a focus on privacy and consent. Its goal is to help clients improve business performance and marketing outcomes while maintaining data privacy and security.

Company Size

1-10

Company Stage

Series A

Total Funding

$14.5M

Headquarters

Cambridge, United Kingdom

Founded

2022

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Simplify Jobs

Simplify's Take

What believers are saying

  • MiddleGame Ventures led Theia’s $8 million Series A on 2026-03-26.
  • Theia hired in London on 2026-07-01, signaling continued operating expansion.
  • Theia’s website updated 2026-08-10 to target stock screening, ETF creation, and risk management.

What critics are saying

  • Theia Analytics Group filed trademark suit in New York on 2025-25-cv-09832.
  • FactSet, MSCI, and SimCorp already bundle adjacent workflows into entrenched enterprise platforms.
  • If private-markets expansion stalls, Theia remains a niche public-markets data vendor.

What makes Theia Insights unique

  • Theia’s ontology maps 3,000 micro-themes across companies, not single-sector labels.
  • Theia sells institutional workflow tools: classification, thematic factors, Concept2Universe, and Theme Watch Indices.
  • Theia’s products already sit behind live indices and portfolios at U.S., U.K., EU institutions.

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Benefits

Health Insurance

Paid Vacation

Paid Holidays

Hybrid Work Options

Stock Options

Company News

Tech.eu
Mar 26th, 2026
Theia Insights grabs $8M to map the global economy with AI.

Theia Insights grabs $8M to map the global economy with AI. The funding will support expansion into new asset classes, starting with private markets, alongside further development of research and engineering capabilities and the growth of the company's global commercial presence. Cambridge-based deeptech company Theia Insights has raised $8 million in Series A funding, led by MiddleGame Ventures, with participation from Further Ventures and Unusual Ventures. The round brings the company's total funding to $14.5 million to date. Theia is addressing a structural limitation in financial markets: the lack of a real-time, accurate representation of the global economy. Most financial institutions rely on static classification systems that assign companies a single industry label, despite businesses increasingly operating across multiple sectors that evolve over time. This fragmentation limits the effectiveness of both human analysis and AI systems, which depend on accurate and consistent data structures to generate meaningful insights. Founded by Dr Ye Tian, Isami Ito, and Dr James Thorne, Theia brings together expertise in AI, financial markets, and enterprise software to build what it describes as a dynamic, AI-driven map of the global economy. Its proprietary technology processes a wide range of corporate data (including regulatory filings, earnings transcripts, and financial disclosures), to create a continuously updated, multidimensional view of company activity. Instead of a single industry label, companies are represented through evolving exposure across multiple sectors and themes. This approach underpins Theia's suite of products, which includes tools for dynamic industry classification, thematic analysis, and translating investment ideas into data-driven company universes. Together, these systems enable financial institutions to better understand structural trends, support portfolio construction, and improve decision-making across research, analytics, and trading workflows. We must first see the economy clearly, not in fragments but as an interconnected whole. Theia exists to map the unmapped, to make visible the structure of the global economy, said Dr. Ye Tian, Founder and CEO of Theia Insights. The company's technology is already used by global index providers, asset managers, hedge funds, and banks, supporting a range of applications from research to portfolio construction. As financial markets increasingly adopt AI-driven workflows, Theia positions its platform as a foundational data layer that enables both humans and machines to reason consistently about economic activity. The funding will be used to expand Theia's platform into new asset classes, beginning with private markets, as well as to further develop its research and engineering capabilities and scale its global commercial presence.

FinTech Futures
Mar 8th, 2024
ICYMI fintech funding round-up: Theia Insights, Lettuce, StackOne, Synnax and more

UK-based Theia Insights has completed a $6.5 million fundraising round led by Unusual Ventures, with participation from Clocktower Ventures, Fidelity International and Strategic Ventures, alongside several angel investors.

Brown Brothers Media
Mar 7th, 2024
UK-based female-founded deep tech startup Theia Insights raises €5.9M to develop AI-powered investment solutions

Cambridge-based Theia Insights, a deep tech startup, announced on Wednesday, February 6, that it has secured $6.5M (approximately €5.9M) in a fresh funding round led by Silicon Valley's Unusual Ventures, with participation from Fidelity International Strategic Ventures, and LA-based Clocktower Ventures, alongside several strategic angels.

The IAI Insights
Mar 7th, 2024
Theia Insights - Foundational AI for the Global Investment Industry

We offer infrastructural technologies for the global finance and investment arenas. Learn more about our state-of-the-art solutions in Industry Classification, Risk Evaluation, and Portfolio Analysis.

Medium
Mar 6th, 2024
Why we’re leading Theia Insights’ $6.5m seed round

Theia Insights is building a proprietary, self-learning knowledge graph and advanced machine learning models for asset management.