Backend Developer Python Fastapi jobs in Slough

Contract Job Title: Back End Developer, Engineering, Defense & Security (DV clearance required) **Contract Start Date: March 2026 ****Contract Length: 12 months, with potential extension **Contract Classification: Inside IR25 ****Contract Location: London, Bristol or Manchester with hybrid worki

IDAM Back-end Java Developer - SC Cleared | £500 - £535 We're working with a global tech powerhouse delivering mission-critical digital transformation for the UK public sector on this exciting opportunity. We are seeking a high-caliber Senior Java Developer with deep IDAM expertise to spearhead a ma

Mid/Senior Back End Developer, Golang | Social Media, Scale-Up, 18 Million Users | Salary Up to £85,000 + Benefits & Bonus (EU/UK Remote) We’re seeking a talented Back-End Developer with strong experience in Golang to join a fast-growing social media mobile application, withover 18 million downl

Mustard Systems

Description At Mustard Systems, we leverage statistical modeling to dive into sports events and help us make informed predictions about future outcomes. By utilising our unique datasets, advanced statistical models, and custom-built software, we strive to accurately forecast sports results. We value

If you need support in completing the application or if you require a different format of this document, please get in touch with at UKI.recruitment@tcs.com or call TCS London Office number 02031552100 with the subject line: “Application Support Request”. Role: Java Backend Engineer Job Type: Perman

Haystack

*IDAM Back-end Java Developer - SC Cleared | £500 - £535** We're working with a global tech powerhouse delivering mission-critical digital transformation for the UK public sector on this exciting opportunity. We are seeking a high-caliber Senior Java Developer with deep IDAM expertise to spearhead a

Syncoms

Job Description What’s in it for you? Within a year of working with us, you will be entrepreneurial, confident in your area of expertise, be amongst the top of your game and the envy of your peers. Many of our colleagues have moved onto exceptional leadership positions leading innovative tech projec

N Consulting Global

Role Title: Python Backend Developer Work mode: Hybrid, 3 days WFO Contract duration: 12 months Location: London -------------------------------------- JOB DETAILS Role Title: Python Backend Developer Experience: 5+ years Backend Developer Role - JD Biosphere Responsibilities Design sophisticated ba

Insight Global is searching for a Sr. Backend Engineer to join the team of our largest entertainment streaming clients. This person will join the senior level team that works on the company’s multiple partnership platforms focused on search and discovery features, billing, payment, and viewing. This

Falcon Smart IT (FalconSmartIT)

Join to apply for the Python Backend Developer role at Falcon Smart IT (FalconSmartIT) . We are seeking a senior developer with extensive experience in building scalable Python backend solutions. The ideal candidate should be proficient in supporting dozens of concurrent requests, handling occasiona

Backend Software Engineer – Python / FastAPI / Event-Driven Architecture (AI Agents / FinTech) Role: Backend Software Engineer - Python Location: London, UK (Hybrid) Type: Full-time Level: Mid to Senior Salary: £70,000 – £100,000 About the Role We’re building an AI-native financial platform designed

Stott and May

Senior Software Engineer Have you got the right qualifications and skills for this job Find out below, and hit apply to be considered. Location: London (x3 days a week onsite) Salary: Up to £100k DOE Type: Perm Job Description We are looking for a passionate Senior Back-End Java Engineer in London t

Stott and May

Senior Software Engineer Location: London (x3 days a week onsite) Salary: Up to £100k DOE Type: Perm Job Description We are looking for a passionate Senior Back-End Java Engineer in London to lead the design and development of core product features and services that power an app used by thousands of

Mid/Senior Back End Developer, Golang | Social Media, Scale-Up, 18 Million Users | Salary Up to £85,000 + Benefits & Bonus (EU/UK Remote) We’re seeking a talented Back-End Developer with strong experience in Golang to join a fast-growing social media mobile application, withover 18 million downloads

MNRecruit

Overview ClimateTech Start-up | London Bridge | 4 days onsite. Tired of being just another engineer? Here’s your chance to be the third backend hire at a fast-growing ClimateTech start-up making a real dent in global carbon emissions. This role focuses on building a scalable backend and shaping the

ScanmarQED

Back-end Developer | UK office, NL Office We are looking for a Back-end Developer to join our international team. You will play an important role in the development of the new ScanmarQED cloud-based software portfolio, develop scalable user experiences and work side-by-side with our international te

Jack & Jill

A leading software company in London is seeking a Senior Software Engineer to own backend architecture and build production-ready Python systems for the Athena platform. You’ll enjoy product ownership in a collaborative startup environment, contributing to impactful solutions in workforce management

A leading logistics SaaS company in London is seeking a Senior Software Engineer to own backend architecture and develop high-performance systems. This role involves transforming operational ideas into production-ready Python solutions in a collaborative startup environment. The ideal candidate has

ISS Facility Services

*Contract: IT** *Location: London****, E14 9SH** *Hours of work: 37.5** *Contract Type: Permanent** We are seeking an experienced Data Developer (Back-End) to support ISS’s transformation as we modernise our data estate and adopt cloud-first technologies. You will play a key role in developing and m

Ncounter Technology Recruitment

Overview Product-Focused Backend Engineer – Functional Programming & Distributed Systems At Ncounter, we’re partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to de