Custom Software Development in Australia

I build and support websites and web apps, and help with data and analysis when that's what you need. Have a look at what I do and some of the work I've done — and if something fits, drop me a line.

About me

I'm Sergey. I'm a software engineer. I believe good software isn't just functional; it's clear. It solves real problems, speaks your users' language, and stands the test of time. I build websites, web apps, and mobile products for businesses and agencies across Australia and overseas, and I work end-to-end — from architecture and design to launch and support — so you get one reliable partner, not a chain of handoffs.

I've got a Software Engineering degree and a Master's in Computer Science, and I've worked commercially in Australian, European, and USA markets. I handle the full development cycle from architecture to launch, and I've used a wide range of frameworks and CMSs along the way. I like to keep learning and bringing new technologies into the mix when they fit.

Get in Touch

Sergey Markov
0Years Experience
0Projects Delivered
0Satisfied Clients
Cups of Coffee

What I do

Services

Whether you're launching something new, refining what works, or fixing what's broken — I help you build digital products that are solid, maintainable, and built to last.

Data Analysis

I am passionate about the challenges of extracting meaningful information from complex datasets.

Applications Development

I will ensure that the application development is executed with precision and excellence.

Website Development

My aim is to build a long-lasting products. I will ensure your website is built the right way.

E-commerce Websites

The most popular platforms are Shopify, Craft Commerce, and WooCommerce.

New Features

Are you considering updating your website or you have a list of ideas waiting to be implemented?

Legacy Issues & Refactoring

Sometimes, you just need to update your existing website using modern coding standards.

What I work with

Skills

Frontend to backend, testing to infrastructure — the tools and stacks I use to ship products.

Frontend

JavaScript TypeScript React Next.js Vue.js Angular Storybook TailwindCSS Material UI

Backend

Node.js Nest.js PHP Laravel Yii Phalcon GraphQL Apollo RESTful APIs PostgreSQL MySQL Firestore

Testing

Playwright Cypress Jest Codeception

Infrastructure

AWS Vercel Docker CI/CD OAuth Stripe API

Built to last

Work

Recent projects I've built or led — from web apps and mobile products to data and integrations.

The Most Recent Projects

Websites, apps, and platforms I've built or led for businesses and organisations.

Better Workplaces (NTEU)

Campaign site for the National Tertiary Education Union: fair pay, secure jobs, and safe workloads for university staff. Built to support bargaining and member engagement across Australian universities.

Indigenous Employment Australia

Job board connecting Aboriginal and Torres Strait Islander people with employers committed to Reconciliation, Diversity, Equity, and Inclusion. Job seekers can search roles, create a profile, and apply; employers post opportunities Australia-wide.

Boby Membership

Affiliate membership platform for Boby assistant (virtual chatbot report system). Boby assistant can connect the user to any onsite security officers at the press of a button for immediate assistance.

Who lives where

Educational game for children from 2 years: discover where animals live.

Agency support

Development support for creative and digital agencies when they need extra capacity.

MyRWAV

A customer CRM system was developed from the ground up for a non-profit government-funded organization, aimed at enhancing healthcare services for rural, regional, and Aboriginal communities in Victoria, Australia.

NTEU – Better Workplaces

Campaign website for the National Tertiary Education Union’s Better Workplaces initiative, supporting university staff in bargaining for fair pay, secure jobs, and safe workloads across Australian universities.

MYP

Cloud-based care management software for NDIS and aged care providers. MYP streamlines client records, rostering, invoicing, and compliance so providers spend less time on admin and more time delivering exceptional care.

Tally Group

Client work for Tally Group, a trusted utility technology partner designing and operating next-generation software for billing, customer engagement, and energy retail—powering 55+ global clients across Australia, NZ, North America, Japan, and UAE.

Dcode Group

Melbourne-based custom software development and digital agency. Dcode Group delivers custom software, digital experiences, e-commerce, workflow automation, and business design for clients across Australia.

BlueMelon Design

Software development assistance for BlueMelon Design, a creative agency helping enterprise Sales, Marketing, Product, and Training teams turn complex ideas into clear, persuasive communication and content.

Out of the Square

Software development support for Out of the Square, an award-winning creative and production agency helping brands deliver extraordinary strategy, creative, and digital solutions since 1997.

MAMA Advertising

Client work for MAMA Advertising, a results-driven property and real estate advertising agency using creativity and 35+ years of experience in digital, traditional advertising, and PR to connect brands with buyers.

We Love Code

Client work for We Love Code, a Melbourne-based web development and UX/UI agency crafting intuitive websites and custom solutions — from API to SEO — for businesses that need more than a one-size-fits-all site.

Tech Stack

My solutions are developed using a robust and modern tech stack that ensures a seamless user experience.

AI tools

Tools I use daily to accelerate development and problem-solving.

Technologies

Frameworks, runtimes, and platforms I use to build and ship products.

Testimonials

Clients express their utmost satisfaction with services provided.

Jens Kosman
Jens Kosman, USA — Executive & Entrepreneur

Sergey worked with us on several PHP, MySQL based projects. He is an asset to any team and I look forward to working with him again in the future.

Philip Tyrer
Philip Tyrer, Australia — Owner, Amparose

Sergey is a good working web programmer. He works well as part of a team and usually goes beyond the brief in his work, improving the project overall.

Richard Walker
Richard Walker, Australia — Director at Redsyntax pty ltd

I have hired Sergey on a number of occasions to help me deal with an overflowing workload. He is a very skilled developer with a versatile skill set.

Matt Arthur
Matt Arthur, Australia — CEO, Surface Digital

Sergey possesses the high level of skill and logical approach to problem solving you'd expect of an experienced web developer. Always prepared to look at problems from different angles, Sergey has been instrumental in the evolution of our successful MemberHQ software platform.

Frequently Asked Questions

After our initial meeting, which can be conducted online, I create a concise project brief that outlines the requirements and scope of work, along with a rough estimate of the cost. Once we are in agreement regarding the budget estimate and timeline, I then prepare a detailed proposal that breaks down all associated costs and prices into separate milestones.
Of course! I appreciate small projects as they allow me to get to know my clients from the outset, building trust and cultivating valuable working relationships.
I offer a 12-month warranty for projects with well-defined scopes.
Yes. I work with clients across Australia and internationally via video calls, email, and shared project tools. Meetings can be scheduled online at a time that suits you.
I work with a broad stack: frontend (React, Vue, Angular, TypeScript), backend (Node.js, PHP, Laravel), databases (PostgreSQL, MySQL, Firestore), and cloud (AWS, GCP, Vercel). I also build with Shopify, Craft CMS, and WordPress. See the Tech Stack and Skills sections for more detail.
It depends on scope — from a few days for small fixes or features to several weeks or months for new builds. After we define the brief, I provide a timeline as part of the proposal so you know what to expect.
Yes. I can offer post-launch support, bug fixes, and further development. We can agree on a support arrangement or ad-hoc work as part of the project discussion.

Let's work together

Contact

Whether you're ready to start a project, need a second opinion, or just want to say hi — I'd love to hear from you. I typically respond within 48 hours.