Freelance Backend Engineers in LondonFreelance Backend Engineers in London
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Ali Shan's avatar
Ali Shan
proLondon, UK
Full-Stack & AI Dev | TypeScript, Next.js, React, Node
$25k+
Earned
5x
Hired
5.0
Rating
75
Followers
Full-Stack & AI Dev | TypeScript, Next.js, React, Node
Cover image for Full Stack Web App Build
Full Stack Web App Build
2
37
Cover image for Payment and Backend Architecture
Payment and Backend Architecture
0
21
Cover image for API Backend for Heavy Concurrent Load
API Backend for Heavy Concurrent Load
0
18
Cover image for Predictive Analytics Platform & ML Service
Predictive Analytics Platform & ML Service
0
14
Backend Engineer(7)
Rania Benotman's avatar
Rania Benotman
proLondon, UK
Senior Full-Stack & AI Engineer · 15+ Projects
$5k+
Earned
1x
Hired
5.0
Rating
65
Followers
Senior Full-Stack & AI Engineer · 15+ Projects
Cover image for Excited to share some of
Excited to share some of the backend work I've been doing lately with Supabase! 🚀 Here's a look at what went into building a production-ready backend from scratch: 🗄️ Database Schema Design Designed a relational schema with multiple interconnected tables: profiles, notes, reminders, conflicts, and a dedicated user_keys table for encryption key management. Every table has proper foreign key relationships, timestamps, and nullable/non-nullable constraints enforced at the DB level. 🔒 Row Level Security (RLS) Every single table has RLS enabled with two policies: users can only access their own rows, and anonymous access is blocked entirely. No exceptions. Security is enforced at the database layer, not just the application layer. 🔑 Auth & Email Flows Set up Supabase Auth with email + OAuth support, including full PKCE flow for secure token exchange. Configured deep link redirects for email confirmation and password reset flows, all tested end to end. ⚡ Edge Functions Built and deployed multiple Supabase Edge Functions handling AI processing pipelines, including JWT validation at the top of every function before any processing begins. The OpenAI API key lives exclusively in Supabase secrets, never in the app or any config file. 🔄 Merge Pipeline Built a follow-up note merge pipeline as an Edge Function. New facts are appended to existing profiles, duplicates are detected and skipped, conflicts are logged, and resolved reminders are handled gracefully. 📦 Migrations All schema changes go through versioned migration files under source control. No manual dashboard changes. CI/CD triggers migrations automatically on merge to main. 🔐 Encryption Architecture Client-side AES-GCM encryption via CryptoKit. Plaintext never sits in the database. Encryption keys are stored in a dedicated RLS-scoped table, fetched after login, and held in memory only for the session duration. Still a lot more to share about this project. Excited to talk about it publicly when it launches! 👀
5
5
1.7K
Cover image for School Management ERP — Laravel · Zoom · HR & Finance
School Management ERP — Laravel · Zoom · HR & Finance
2
12
Cover image for Alweqaya — B2B & B2C E-commerce · Flutter · RBAC
Alweqaya — B2B & B2C E-commerce · Flutter · RBAC
2
7
Cover image for Briefly — AI Content Brief Generator (React + Express + Groq)
Briefly — AI Content Brief Generator (React + Express + Groq)
1
6
Backend Engineer(3)
IDOWU ELIJAH's avatar
IDOWU ELIJAH
London, UK
AI Product Engineer | Building Production Ready AI Apps
14
Followers
AI Product Engineer | Building Production Ready AI Apps
Cover image for Today's win wasn't writing code.
Today's win wasn't writing code. It was fixing it. I spent hours tracking down an index.js issue that kept breaking my CLI. It wasn't fun but solving it taught me more than if everything had worked the first time. Errors don't make you a bad developer. Avoiding them doesn't make you a great one. Learning to debug does. Every bug fixed is another skill earned. What's one bug that taught you the most?
2
52
Cover image for 62% today. 100% is the
62% today. 100% is the goal. 🚀 I challenged myself to reach a 100% Discovery Score before the end of the month. That means showing up consistently, building in public, sharing what I learn, and creating value every day not chasing numbers. Every post is one step closer. What's one professional goal you're determined to achieve before this month ends?
13
9
202
Cover image for Most developers stop after building
Most developers stop after building the app. I enjoy building the tools that make developers faster. Today I'm working on my custom Developer CLI to automate repetitive tasks and streamline my workflow. If you could add one feature to your dream developer CLI, what would it be? 👇 I'm curious to hear your ideas.
18
12
243
Cover image for The biggest mistake businesses make
The biggest mistake businesses make with AI come and learn. They think they need more AI tools. They don't. What they really need is one AI solution that solves one expensive problem. I've seen businesses pay for: 1. ChatGPT Plus 2. Claude 3. Gemini 4. Cursor 5. Multiple automation platforms Yet their teams still spend hours every week on repetitive work. Why? Because buying AI tools isn't the same as building an AI workflow. The businesses getting the best results aren't using the most tools. They're asking better questions. Instead of: ❌ "Which AI tool should we buy?" They ask: ✅ "Which task costs us the most time every week?" That's where AI creates real ROI. Whether it's lead qualification, customer support, document processing, internal approvals, or reporting, solving one bottleneck often delivers more value than adding five new AI subscriptions. That's how I approach every AI project: Start with the business problem. Then build the AI solution. I'm curious... What's one repetitive task in your business that you'd automate tomorrow if you could? I'd love to hear how others are thinking about AI adoption. #AI #Automation #BusinessAutomation #AIEngineering
2
12
219
Backend Engineer(11)
Abdulhamid Sonaike's avatar
Abdulhamid Sonaike
London, UK
full stack engineer with 2 yrs experience in AI applications
5.0
Rating
18
Followers
full stack engineer with 2 yrs experience in AI applications
Cover image for Sumwise AI
Sumwise AI
1
12
Cover image for OPSIS AI: Revolutionizing Storyboard Creation
OPSIS AI: Revolutionizing Storyboard Creation
1
16
Cover image for CSSPify Chrome Extension Development
CSSPify Chrome Extension Development
1
12
Cover image for DeepCoder Coding Assistant
DeepCoder Coding Assistant
1
3
Backend Engineer(2)
Enoch Sagini's avatar
Enoch Sagini
London, UK
Senior Dev & Data Analyst · Laravel · Python · Next.js
New to Contra
Senior Dev & Data Analyst · Laravel · Python · Next.js
Cover image for Transform Your Data with Sagini AI: Instant Analytics & Insi...
Just shipped Sagini AI Analytics — sagini.net (http://sagini.net) Drop in a CSV. Get back charts, anomaly detection, AI-generated insights, and a shareable report. No SQL. No analyst. No waiting. This is what I built because I was tired of clients paying thousands for dashboards that take weeks to deliver. Sagini AI does it in seconds. Stack: FastAPI · Python · Pandas · Plotly · SQLite · Vanilla JS If you need a custom version of this — internal analytics tool, automated reporting, AI integrated into your existing data pipeline — that's exactly what I do. Live at sagini.net (http://sagini.net). More at sagini.me (http://sagini.me). DM me and let's build something.
1
59
Cover image for Just shipped something I've
Just shipped something I've been building for a while. If you've ever started a Laravel project and spent the first two days just setting up JWT auth, user roles, protected routes and a basic API structure — this is for you. The Laravel JWT API Starter Kit gives you all of that out of the box. Register returns 201. Login returns 200 with a token. Every endpoint tested before release. It also includes posts CRUD with likes, comments, replies and view tracking. Zero config SQLite database. Clean structure that's easy to extend. Get it here: https://contra.com/iamsagini Pairs with Devboard, the Next.js dashboard I also just shipped. Buy both and have a complete full-stack application running in under an hour.
2
3
115
Cover image for Built a production financial management
Built a production financial management system for a real 6-member savings group managing over £1,900 in collective funds. Includes real-time dashboards, loan tracking, interest calculations, and member savings analytics. Stack: Laravel · MySQL.
1
64
Cover image for Engage & Share: Explore Our Dynamic Q&A Social Network Now
A Q&A and social networking platform where people can share ideas, ask questions, and engage freely across topic hubs like Tech, Careers, Money, and more — featuring feeds, voting, comments, reposts, and bookmarks. Built and actively being expanded.
2
95
Backend Engineer(3)
Teodor Moldoveanu's avatar
Teodor Moldoveanu
London, UK
Software engineer skilled in C#, web dev, and AI solutions.
Software engineer skilled in C#, web dev, and AI solutions.
Cover image for CSharpTeoMan911/2_Large_Networks_With___DHCP___VOIP___TELNET___…
CSharpTeoMan911/2_Large_Networks_With___DHCP___VOIP___TELNET___…
0
5
Cover image for GitHub - CSharpTeoMan911/ThetaFTP
GitHub - CSharpTeoMan911/ThetaFTP
0
6
Cover image for BerrySonar: DIY LIDAR System Development
BerrySonar: DIY LIDAR System Development
0
15
Cover image for Eva the AI Assistant
Eva the AI Assistant
0
16
Backend Engineer(2)
Guillermo Olmos Ranalli's avatar
Guillermo Olmos Ranalli
London, UK
Fullstack Software Engineer | React, Node, Java
Fullstack Software Engineer | React, Node, Java
Cover image for Faster Payment Microservices Development and Migration
Faster Payment Microservices Development and Migration
0
6
Cover image for Custom Corrections
Custom Corrections
0
20
Cover image for Conway's Game of Life
Conway's Game of Life
0
20
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Backend Engineer(2)