Junior software developer (c#/html/api) Work, Jobs in London, England (with Salaries)

Junior / Intermediate Developer
Stonerise Technology Ltd —London
- £40,000 - £50,000 a year
- Full-time
- ERP systems
- Master's degree
- APIs
- Annual leave
Quick apply
1d
Software Engineer, Junior / Graduate (m/f/*)
Quaisr —London
- £45,000 - £55,000 a year
- Full-time
- Hybrid work
- Software development
- Communication skills
- Annual leave
Junior C# Full Stack Developer
Palantir —London
- Communication skills
Quick apply
Software Developer - Technology - Counter Terrorism Policing HQ
Metropolitan Police —London
- £52,653 - £57,417 a year
- Full-time
- Hybrid work
- English
- Mentoring
- Software development
1d
Junior Web Developer (C# / Blazor)
Simpson Spence Young —London
- Azure
- Bachelor's degree
Junior Web QA Tester
LGC Group —London
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Bachelor's degree
Quick apply
8d
Junior Python Developer
RSM UK —London
- Full-time
- Hybrid work
- Azure
- Databases
- Mentoring
Junior Front End Developer
Byte9 —London
Junior / Mid-Level Full Stack Developer
NECSWS —London
- Full-time
- Remote
- Computer Science
- Engineering
- Agile
- Annual leave
Quick apply
Backend Developer (.NET C#)
TransPerfect —London
- Full-time
- Computer Science
- Engineering
- Master's degree
Junior AI Applied Python Backend Engineer
Code X London —London
- £30,000 - £35,000 a year
- Full-time
- Azure
- Computer Science
- Engineering
- Free parking
- Gym membership
Quick apply
Graduate Desktop UI Developer
Acturis —London
- Full-time
- Hybrid work
- Bachelor's degree
- Communication skills
Quick apply
Junior AI Agent Developer
Levocell Ltd —Slough
- £30,990.02 - £40,000.00 a year
- Full-time
- Computer Science
- Software troubleshooting
- Engineering
- Free parking
Quick apply
7h
Python Developers
CGI —London
- Full-time
- AWS
- Mentoring
- Software development
Quick apply
Front Office Software Engineer
CMC Markets —London
- Full-time
- Computer Science
- Maths
- Mentoring
1d
Software Engineer I
Everfox —London
- £32,600 - £53,600 a year
- Full-time
- Analysis skills
- Bachelor's degree
- Travel
- Annual leave
Software Engineer
AlliedCrowds —London
Full Stack Developer
RGH‑Global Limited —Canary Wharf
- £60,000 - £65,000 a year
- Hybrid work
- AWS
- Mentoring
- Annual leave
Full Stack GIS Developer
Informed Solutions —London
- Full-time
- Hybrid work
- Communication skills
- Time management
- Gym membership
- Referral programme
Quick apply
Software Engineer
Dune —London
- Full-time
- Remote
- System design
- SQL
- Software development
- Annual leave

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junior software developer (c#/html/api) jobs near london, england

Junior / Intermediate Developer

Stonerise Technology Ltd
London

Quick apply

Job details

Permanent | Full-time
£40,000 - £50,000 a year
1 day ago

Benefits

Casual dress
Annual leave
Company pension

Qualifications

Law
Purchase order matching processing
React
ERP systems
Git
Data and database experience
Master's degree
Express.js
Docker
CI/CD pipelines
PostgreSQL
Continuous integration
Redis
SDKs
Back-end development
GitHub
APIs
Front-end development
S3
Unit testing
DynamoDB
AI
Software development or architecture experience
TypeScript
Communication skills
Supplier invoice processing

Full job description

About us

StoneRise builds a multi-tenant ERP platform for the [construction / built environment] sector. It is a single product suite covering procurement, HR, commercial management, subcontractor payments, site management, health and safety, and training, used daily by teams running live projects.

You would be joining a mixed engineering team of onshore developers based in our London office and offshore developers working alongside us.

This is an office based role at our Kings Cross / Camden office, five days a week.

The role

We are looking for an intermediate developer to join our engineering team. You will work across the full stack, covering Next.js front ends, Fastify APIs, PostgreSQL and Prisma data models, and AWS Lambda background jobs.

This is a hands on role for someone comfortable owning a feature from database schema through to UI. You will get plenty of ownership, code review from senior engineers, and exposure to a broad stack.

As we work across time zones, clear written communication is important. That means good pull request descriptions, clear tickets, and flagging blockers early.

What you will be working on

Building features across our Next.js applications (admin shell, procurement, HR, commercial) using the App Router, React and our shared component library
Designing and building REST endpoints in our Fastify microservices with typed request and response schemas
Modelling data in PostgreSQL via Prisma, extending a large multi-tenant schema
Writing AWS Lambda functions for background processing, including invoice OCR and matching, purchase order validation, quotation matching, inbound email processing, accounting sync, and scheduled notifications
Integrating third party services including Stripe for billing, accounting systems, Microsoft Graph, Pusher for real time updates, and Twilio
Working on AI assisted features such as document data extraction and invoice matching
Writing unit, integration and end to end tests in Jest
Reviewing code from across the team and contributing to the shared internal packages used throughout the platform

Tech stack

Language and tooling

TypeScript
Node.js 24
Turborepo monorepo with Yarn 4 workspaces
ESLint, Prettier
GitHub Actions for CI/CD across dev, test, staging and production

Front end

Next.js 14 (App Router)
React 18
Tailwind CSS
TanStack Query
Shared in-house component library
Heroicons
PDF generation and preview, spreadsheet import and export

Back end

Fastify 5 microservices with TypeBox schema validation
Next.js API routes as a BFF layer
JWT based authentication with role and permission based authorisation
Multi-tenant architecture with tenant level data isolation

Data and infrastructure

PostgreSQL
Prisma ORM
Redis (ioredis)
BullMQ for job queues
AWS Lambda, S3, SQS, SNS, DynamoDB, CloudWatch, CloudFront
LocalStack and Docker for local development

AI and integrations

Anthropic SDK and an in-house AI service layer
Stripe
Microsoft Graph
Pusher
Twilio
Nodemailer
Accounting system integrations

Quality and monitoring

Jest for unit, integration, end to end, performance and security tests
Sentry for error monitoring
Structured logging
OpenAPI and Apidog for API documentation

What we are looking for

Essential

2 to 4 years of commercial software development experience
Strong TypeScript and JavaScript
Solid React experience, and experience with Next.js or a similar SSR framework
Experience building Node.js back end services and REST APIs
Working knowledge of relational databases and SQL, ideally with an ORM such as Prisma, TypeORM or Drizzle
Comfortable with Git, pull requests and code review
Able to write tests for your own work
Clear communicator in writing as well as in person, as you will be working daily with colleagues in other time zones
Able to work full-time from our Kings Cross / Camden office

Desirable

Strong understanding and experience using AI assisted coding such as Cursor
Fastify, Express or NestJS
AWS services, particularly Lambda, S3 and SQS
Monorepo tooling such as Turborepo or Nx, or Yarn and pnpm workspaces
Redis, message queues or other background job systems
Tailwind CSS
Multi-tenant SaaS
Working with LLM APIs or AI assisted product features
CI/CD pipelines and GitHub Actions
Experience working in a distributed or partly offshore team
Exposure to ERP, finance or construction software

What we offer

£40,000 to £50,000 depending on experience
Central London office in Kings Cross / Camden
20 days annual leave + public holidays + company Christmas/New Year shut down
Company pension scheme
Ownership of features from design through to production
Broad exposure across front end, back end, cloud infrastructure and AI features
Mentoring from senior engineers and a clear path to senior

Pay: £40,000.00-£50,000.00 per year

Benefits:

Casual dress
Company pension

Work Location: In person

Quick apply

Refine Your Search

junior software developer (c#/html/api) jobs in london, england

Junior / Intermediate Developer

Software Engineer, Junior / Graduate (m/f/*)

Junior C# Full Stack Developer

Software Developer - Technology - Counter Terrorism Policing HQ

Junior Web Developer (C# / Blazor)

Junior Web QA Tester

Junior Python Developer

Junior Front End Developer

Junior / Mid-Level Full Stack Developer

Backend Developer (.NET C#)

Junior AI Applied Python Backend Engineer

Graduate Desktop UI Developer

Junior AI Agent Developer

Python Developers

Front Office Software Engineer

Software Engineer I

Software Engineer

Full Stack Developer

Full Stack GIS Developer

Software Engineer

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