Senior Front-end Software Engineer ( React, Bazel And Java )

TEKsystems
London, United Kingdom
Today
£40,000 – £60,000 pa

Salary

£40,000 – £60,000 pa

Job Type
Contract
Work Pattern
Full-time
Work Location
On-site
Seniority
Senior
Education
Degree
Posted
29 Apr 2026 (Today)

Senior Front-end Software Engineer ( React, Bazel and Java)

** YOU MUST LIVE IN THE UK- ALSO SPONSORSHIP IS NOT PROVIDED**

The organisation manages the test infrastructure and tooling that underpin its client applications. The mission is to provide a reliable, consistent and efficient testing ecosystem that enables engineers to validate their code with confidence and ship high‑quality products. The systems are continually evolving to improve developer experience, reliability and automation through well‑designed services, tooling, documentation and support. The engineering group is migrating its entire client platform application into a Bazel‑based monorepo, so experience in that environment is highly valued.

They are looking for a platform‑minded full‑stack engineer with strong data and infrastructure instincts. In this role, you’ll use your curiosity and adaptability to build and improve the test infrastructure that supports all client platforms. This includes web‑focused test frameworks, data pipelines, backend services and internal developer tooling.

What You’ll Do

Contribute to the ongoing migration to a Bazel‑driven monorepo

Shape and drive the technical roadmap for the test infrastructure environment

Improve testing practices across the engineering organisation

Support engineers to drive test automation and remediate debugging failuresMust Haves

Strong in React, Bazel and Java (the three core skills )

Comfortable using AI agents (Claude, Cursor, etc.) to enhance development and tooling

Skilled with modern web application test tooling (Mocha, React, WebdriverIO)Preferred Skills

Proficient in Java backend services (Apollo + PostgreSQL preferred)

Familiar with CI pipelines and infrastructure tooling

Experienced with automated testing and scalable test systems

Comfortable working across multiple codebases and domains when needed

Strong understanding of software architecture and design principles

Job Title: Senior Front-end Software Engineer ( React, Bazel And Java )

Location: London, United Kingdom

Job Type: Contract

Trading as TEKsystems. Allegis Group Limited, Maxis 2, Western Road, Bracknell, RG12 1RT, United Kingdom. No. (phone number removed). Allegis Group Limited operates as an Employment Business and Employment Agency as set out in the Conduct of Employment Agencies and Employment Businesses Regulations 2003. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as "Allegis Group"). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands. If you apply, your personal data will be processed as described in the Allegis Group Online Privacy Notice available at (url removed)>

To access our Online Privacy Notice, which explains what information we may collect, use, share, and store about you, and describes your rights and choices about this, please go to (url removed)>

We are part of a global network of companies and as a result, the personal data you provide will be shared within Allegis Group and transferred and processed outside the UK, Switzerland and European Economic Area subject to the protections described in the Allegis Group Online Privacy Notice. We store personal data in the UK, EEA, Switzerland and the USA. If you would like to exercise your privacy rights, please visit the "Contacting Us" section of our Online Privacy Notice at (url removed)/en-gb/privacy-notices for details on how to contact us. To protect your privacy and security, we may take steps to verify your identity, such as a password and user ID if there is an account associated with your request, or identifying information such as your address or date of birth, before proceeding with your request. If you are resident in the UK, EEA or Switzerland, we will process any access request you make in accordance with our commitments under the UK Data Protection Act, EU-U.S. Privacy Shield or the Swiss-U.S. Privacy Shield

Related Jobs

View all jobs

Senior Backend Engineer - Python

Xact Placements Limited United Kingdom

Senior Full Stack Engineer

RSMB Holborn, London, WC1R 5AH, United Kingdom
£85,000 pa Hybrid

Senior Staff Software Engineer

Matillion India
Hybrid

Forward Deployed Engineer

VIQU IT London, United Kingdom
£800 – £850 pd Contract

Aladdin & Snowflake) Data Consultant / Engineer

Opus Recruitment Solutions United Kingdom
£500 – £550 pd Remote

Senior Data Platform Engineer

ITSS Recruitment London, United Kingdom
£70,000 – £100,000 pa Remote

Subscribe to Future Tech Insights for the latest jobs & insights, direct to your inbox.

By subscribing, you agree to our privacy policy and terms of service.

Industry Insights

Discover insightful articles, industry insights, expert tips, and curated resources.

Where to Advertise Data Engineering Jobs in the UK (2026 Guide)

Advertising data engineering jobs in the UK requires a different approach to most technical hiring. Data engineers occupy a distinct discipline that sits between software engineering, data science and cloud infrastructure — and the strongest candidates identify firmly with the data engineering community rather than with adjacent roles. General job boards consistently conflate data engineering with data analysis, data science and BI development, producing high application volumes but low candidate quality for specialist pipeline and platform roles. This guide, published by DataEngineeringJobs.co.uk, covers where to advertise data engineering roles in the UK in 2026, how the main platforms compare, what employers should expect to pay, and what the data says about hiring across different role types.

New Data Engineering Employers to Watch in 2026: UK and Global Companies Driving the Data Revolution

Data engineering is at the heart of the digital economy, transforming raw data into actionable insights, powering analytics, AI systems, and cloud infrastructure. As the UK and global markets continue to invest heavily in data platforms, pipelines, and real-time analytics, demand for skilled data engineers is growing rapidly. For professionals exploring opportunities on www.DataEngineeringJobs.co.uk , the critical question is: which companies are expanding, hiring, and shaping the future of data-driven business? This article highlights new data engineering employers to watch in 2026, including UK startups, scale-ups, and international firms expanding in the UK.

How Many Data Engineering Tools Do You Need to Know to Get a Data Engineering Job?

If you’re aiming for a career in data engineering, it can feel like you’re staring at a never-ending list of tools and technologies — SQL, Python, Spark, Kafka, Airflow, dbt, Snowflake, Redshift, Terraform, Kubernetes, and the list goes on. Scroll job boards and LinkedIn, and it’s easy to conclude that unless you have experience with every modern tool in the data stack, you won’t even get a callback. Here’s the honest truth most data engineering hiring managers will quietly agree with: 👉 They don’t hire you because you know every tool — they hire you because you can solve real data problems with the tools you know. Tools matter. But only in service of outcomes. Jobs are won by candidates who know why a technology is used, when to use it, and how to explain their decisions. So how many data engineering tools do you actually need to know to get a job? For most job seekers, the answer is far fewer than you think — but you do need them in the right combination and order. This article breaks down what employers really expect, which tools are core, which are role-specific, and how to focus your learning so you look capable and employable rather than overwhelmed.