Do you recommend Node.js or Python?

Node.js and NestJS are our default for product APIs; Python and FastAPI are a strong fit for AI, data, and scientific workloads. Many products use both behind explicit boundaries. We choose per workload, not per developer preference.

Do you build microservices?

When the operational or organisational case is real. For most growing products we start with a modular monolith: fewer moving parts, easier transactions, and a clear path to extract services later. Microservices are not a substitute for module boundaries.

Can you take over an existing backend?

Yes. We start by mapping architecture, data, security, production incidents, and deployability. Then we recommend evolve, isolate, or selectively rebuild. A full rewrite is a last resort, not a sales strategy.

How do you design for scale?

We identify likely bottlenecks, keep application nodes stateless where practical, use queues for bursty work, index from measured query patterns, and load-test critical flows. We do not pre-build a billion-user architecture for a product finding its first thousand.

What testing do you include?

Unit tests around business rules, integration tests across database and queues, contract tests at external boundaries, and end-to-end coverage for critical flows such as payments and access control. Test depth follows business risk.

Will we be able to operate the backend ourselves?

Yes. Code, infrastructure, documentation, dashboards, alerts, and runbooks live in your accounts. Handoff includes architecture context and incident procedures, not just repository access.

Product infrastructure

Backend Development

Node.js, NestJS, and Python backends with the contracts, data model, security, queues, and operational tooling needed to hold up after launch.

Schedule a meeting See what we build

Certified partnerships

Rated by clients and team

Clutch

What you get

A backend your team can extend and operate

We build the boring foundations properly: clear boundaries, safe transactions, useful logs, tested failure paths, and documentation tied to the real system.

Node.js + NestJS APIs

Type-safe product APIs with validation, stable contracts, structured errors, OpenAPI docs, and clear module boundaries.

Python + FastAPI services

Async APIs and workers for AI, data, and compute-heavy workloads without turning the whole product into Python by default.

Postgres + data modelling

Schemas, migrations, indexes, query plans, transactions, and retention rules designed around actual access patterns.

Authentication + authorization

Session and token flows, RBAC or ABAC, tenant isolation, row-level security, and auditable privilege changes.

Billing + subscriptions

Stripe and Paddle integrations, usage metering, entitlements, invoices, dunning, webhooks, and reconciliation.

Queues + background jobs

BullMQ, Celery, SQS, scheduled work, backpressure, idempotency, retry policies, and dead-letter handling.

Event-driven systems

Domain events, webhooks, outbox patterns, replay, and observability without introducing a distributed system prematurely.

Compliance-ready foundations

Encryption, audit logs, secrets, PII boundaries, access controls, and evidence-friendly infrastructure from the first release.

Backends that scale from MVP to revenue.

Delivery

How we build production backends

01
Model the product
We map users, permissions, data ownership, integrations, critical transactions, and expected load before choosing architecture.
02
Contract + threat design
API schemas, failure semantics, authorization boundaries, and security risks are reviewed before implementation starts.
03
Build in vertical slices
Each slice includes persistence, business logic, API, tests, logs, and deployment: so progress is demonstrable and usable.
04
Load, launch, handoff
We test realistic bottlenecks, configure alerts, document runbooks, and hand the system over with its operational context intact.

Built for production

Your backend should not be the bottleneck

We build backends with clear module boundaries, safe transactions, useful logs, and tested failure paths. The code, infrastructure, dashboards, and runbooks live in your accounts: you operate it without us from day one.

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Fit

Where we add the most value

Best for

A product backend must support real customers, money, or sensitive data
An MVP backend is becoming the bottleneck to growth
You need Node.js and Python services to work as one supportable system
Your team needs an API contract and architecture it can extend

Not for

A static marketing site with no meaningful server-side product logic
Microservices requested only because they sound more scalable
A rewrite without evidence that the current backend cannot be evolved

Related services

Build the system around the backend

API Integration

Connect the backend to payments, KYC, EHR, CRM, and other external systems.

Explore service

DevOps & Cloud

Deploy, observe, secure, and scale the backend on reproducible cloud infrastructure.

Explore service

Data Engineering

Turn operational data into reliable pipelines, warehouses, and product-ready datasets.

Explore service

Testimonials

What founders say after the build

Verbatim quotes from teams we shipped to production. We publish testimonials with written sign-off on file.

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Recorded client call
“I find him very nice to work with and he actually delivers a very good quality. So I am really happy with him.”
Noa van der Veen · Strategy and operations, CheckyPro
Recorded client call
“I very much respect the knowledge that you have. You have a lot of things, just in our few communications, that no one else has mentioned. No one else has even made me think about them.”
Mirinda Scott · Founder, AI Change Mangement
SkinOS / 2250.care
“The team treats our roadmap like their own. Every standup felt like working with our own engineers, not an outside vendor.”
SkinOS team
Clinical product, SkinOS / 2250.care
Recorded client call
“You're doing very, very well... the confidence that you're building with me — the full product is what I want to go with.”
Evan Kerivan · Founder & CEO, Restaurants Insightful
CheckyPro
“They told us what NOT to build. That single conversation re-shaped six months of roadmap and saved us a lot of money.”
CheckyPro team
Operations, CheckyPro
Recorded client call
“You guys seem switched on and like you know what you're doing. I've got a good feeling about it.”
Dan Cameron · Founder, Self-image
Recorded client call
“You guys take a lot of pride and ownership in the work.”
Hamza Tariq · Co-Founder, GoldenEye
PixelFox
“They shipped the production version of what our previous agency had been promising for nine months, without the weekly excuses.”
PixelFox team
Founders, PixelFox
Recorded client call
“I find him very nice to work with and he actually delivers a very good quality. So I am really happy with him.”
Noa van der Veen · Strategy and operations, CheckyPro
“I had a large project built that needed a very specific understanding and the project was executed perfectly. Great design, great code, no bugs and anything I needed was done incredibly professionally. I would highly recommend and I will definitely be coming back with my…”
Verified client
Israel
$4,000+ · 11 monthsVerified client review
“We approached several sellers in our search to get an app developed for our Shopify store. I had a very clear idea in my mind what we wanted and, through [their] expert questioning, [they] absolutely 'got it'. This was further proved through delivery of a…”
Verified client
United Kingdom
$1,500–$2,000 · 4 weeksVerified client review
“We're working on a Shopify app that retrieves book data from our API and helps online stores and booksellers create book listings faster. This time, we needed to improve the app design and fix functionality issues. In general, we're satisfied with the service and plan…”
Barbara Hartman
Repeat client · United States
$400–$600 · 3 weeksVerified client review
“This was a special request where we needed to rush this development. [They] complied and finished everything at the agreed time, and even worked until 2AM [their] local time in order to finish this on time. [They] went the extra mile for us with this…”
Verified client
Canada
Verified client review
“[They were] very patient as we figured out exactly what we needed our app to do. [They were] able to get all the functionality we required, communicated well, and [were] upfront about the cost. We'll definitely be coming back for future projects!”
Ben McLellan
Canada
Verified client review
“Absolutely fantastic work. This was a tricky app, and [they] did great work. [They] really know [their] way around Shopify and the process for developing a Shopify app, which was a great help to me! [They're] motivated and committed, and delivered a very high-quality app.…”
Lisa Zigel
Israel
Verified client review
“I am very pleased to have worked with [them]! [They were] very detailed and delivered me perfection in an app! I look forward to working with [them] again!”
Verified client
United States
$3,000–$4,000 · 2 monthsVerified client review
“Amazing service. Amazing time. Took all input and made the site great even with minor changes along the way. Will certainly try to use again if I'm lucky enough to have [them] work with me again. Thank you for everything.”
Gabriel Muller
United States
Verified client review
“Very fast and thorough. [They] did exactly what I asked and then went the extra mile to tie up a couple of loose ends. I'm really pleased with the speed and efficiency, and would certainly recommend [them]. Thank you for your help and highly professional…”
Danny Venn
Cambodia
Verified client review
“[They understand] the problem so well and deliver the results super quick. I'll not hesitate to say that I've found a gem. One thousand percent recommended!”
Verified client
Pakistan
Verified client review
“Very positive experience. [They are] diligent, hardworking, and [have] good communication skills. Highly recommended.”
Max Hawthorne
United States
Verified client review
“[They were] very patient, [and] prepared to go the extra mile so I got the result I wanted. Highly recommended.”
Carey Heazlewood
Australia
Verified client review
“The project was not easy, literally. [They] did hard work on our project and finished as expected. Would like to work on upcoming new features together. Thank you.”
Erica Yagelsk
United States
Verified client review
“[They are] reasonable, meticulous, [have] a great sense of design, and [are] very responsive. I really enjoyed working with [them] and [they] delivered a beautiful website for me.”
Verified client
United States
Verified client review
“Extremely patient and did not stop until what I needed was delivered. Excellent partner to work with!”
R. Mendoza
United States
Verified client review
“I didn't expect such great service from someone I found without a referral. I got lucky and I hope to work with [them] again in the future.”
Verified client
United States
$1,500–$2,000 · 10 daysVerified client review
“Bought this to create a website for my startup company. Results were above and beyond what I was expecting! Quick to answer, and always gave great input and ideas!”
J. Leonard
United States
Verified client review
“We are very impressed with the service and the delivery and will use them again!”
Alexander Ekdahl
Sweden
Verified client review
“Great work and completed exactly as requested!”
Margie Odom
United States
Verified client review
“100% satisfied. Got more than expected.”
Christine Malo
Canada
Verified client review
“Great communication, great result.”
Havsund
Germany
Verified client review
“Thank you so much for such outstanding work.”
Valdour
Spain
Verified client review

4.6/5across 58 verified client reviews.Read them all at source