Our agile software development process, from first conversation to final launch.
Most founders have been through a software project that felt like a black box. Work happened somewhere. Updates arrived occasionally. The product that emerged was not quite what was discussed. The process felt opaque from the start.
Exline Labs is built around the opposite of that. Every stage of the SaaS product development methodology is visible to the client. Every decision is explained. Every deliverable is reviewed and approved before the next phase begins. You are not a spectator on your own project.
Our agile software development process, phase by phase.
01
Discovery sprint
Before a single screen is designed or a line of code is written, we map the problem. The discovery sprint covers requirement analysis, user research, competitive landscape review, information architecture planning, and full project scoping. If anything in the original brief does not hold up under scrutiny, we flag it here, not halfway through the build.
Client involvement is high during this phase. We push back on assumptions. We ask difficult questions. We share preliminary findings before forming conclusions. The output of the discovery sprint is not a document produced in isolation. It is the result of a structured conversation between the Exline Labs team and the client.
- Product brief and functional specification
- User research findings
- Information architecture map
- Prioritised feature set
- Sprint plan
- Project timeline
- Fixed-scope proposal with milestone pricing
02
Design sprints
With an approved product brief in hand, UX design begins. We work in Figma, and the client has access to the Figma workspace from day one. No design is presented as finished work in a formal presentation. Design evolves iteratively with client feedback built into every cycle.
The number of design sprints depends on the complexity of the product. Every user journey is mapped before a screen is designed. Wireframes come before visual design. Every deliverable is reviewed and approved before the team moves to high-fidelity UI. This order is not flexible. It exists to catch structural problems before they become expensive to fix.
- User flow diagrams
- Wireframes
- Interactive prototype
- High-fidelity UI design
- Component library and design system
- Client-approved designs ready for development handoff
03
Development sprints
Full-stack engineering runs in two-week sprint cycles. Each sprint has a defined scope agreed at the sprint kickoff. At the end of every sprint, working software is deployed to a staging environment and demonstrated to the client. Not a slide deck. Not a Figma file. A working build the client can open, navigate, and respond to.
Sprint ceremonies the client participates in: sprint kickoff to align on goals, and sprint review at the end of each cycle where working software is demonstrated and feedback is captured before the next sprint begins. The same developer who writes the first line of code ships the last one. No mid-project handoffs.
- Working software deployed to staging at each sprint end
- Sprint review notes
- Updated Jira task board
- Client-approved build before proceeding to the next sprint
04
QA sprint
A dedicated QA sprint runs before any production deployment. This covers functional testing against the user journeys mapped in phase two, regression testing across all features, cross-device and cross-browser testing, accessibility checks, and bug resolution before the product goes live.
Nothing ships to production until it passes QA. This is a non-negotiable part of the Exline Labs process.
- QA test report
- Resolved bug log
- Production-ready product
- Deployment to production environment
- Handoff of source code
- Credentials
- Documentation
After launch, many clients move to a dedicated developer or extended team on a monthly retainer. The same people who built the product stay on it. No re-briefing, no new team member getting up to speed, no loss of context.
Choose the model that fits your situation.
Before the process begins, the right commercial model needs to be in place.
Exline Labs works across three engagement structures depending on what the client needs.
Fixed scope
Best suited when you have a product idea or a defined problem that needs a digital solution, with a set budget in mind. If you have detailed specifications ready, we work from those. If you do not, we work with you to shape, define, and document your vision into a clearly scoped project with a fixed cost and confirmed timeline before any build work begins.
Resource plan
Exline Labs assembles the right team for the project scope. A UX designer, one or more developers, and a QA engineer depending on the complexity. Tharsh is personally involved in every engagement from kickoff to delivery.
Length of engagement
A fixed timeline agreed before work begins, structured around sprint milestones. MVP builds typically run 6 to 8 weeks. UX engineering engagements run 8 to 10 weeks. Timelines are confirmed in the proposal.
Management
Exline Labs project lead manages sprint planning and client communication. You are updated at every sprint kickoff and sprint review. No day-to-day management overhead on your side.
Billing
Fixed price confirmed in the proposal. Paid in three milestones: a deposit at project start, a payment at design sign-off, and the final payment on delivery.
Dedicated developer
The right choice when you have a live product with an active roadmap and need a reliable developer or designer working inside your team without the cost and commitment of a permanent hire. One person, fully embedded, working your hours, treating your roadmap as their own.
Resource plan
One developer or designer matched to your role, tech stack, and seniority requirements. Selected specifically for your product, not assigned from a general pool.
Length of engagement
Starts with a one-month trial. After the trial, the engagement continues month to month with no forced lock-in. Scale up, scale down, or pause based on what your team needs.
Control
Full control. The developer works under your direct supervision, attends your standups, and reports to you. Exline Labs handles sourcing, HR, and continuity. You handle the roadmap.
Billing
Monthly. A single invoice at the start of each month covering the agreed retainer rate. No hidden fees, no recruitment charge on top.
See how the dedicated developer model works
Extended team
Built for when your product needs more capacity than one person can provide. Whether you are scaling a product, running multiple workstreams simultaneously, or covering several skill gaps at once, we assemble the right combination of developers, designers, and QA engineers to work inside your team as a cohesive unit.
Resource plan
Multiple Exline Labs team members assembled based on your team's gaps. Frontend, backend, UX design, QA, and DevOps in any combination. Scaled to the size your product needs.
Length of engagement
Same flexibility as the dedicated developer model. Month to month after an initial trial period. Scale the team up or down as your roadmap evolves.
Control
Full control over priorities and roadmap. Exline Labs manages the team internally. You interact with the team as you would with in-house staff.
Billing
Monthly. A single consolidated invoice covering all embedded team members at their agreed rates.
See how the extended team model works
Best suited when you have a product idea or a defined problem that needs a digital solution, with a set budget in mind. If you have detailed specifications ready, we work from those. If you do not, we work with you to shape, define, and document your vision into a clearly scoped project with a fixed cost and confirmed timeline before any build work begins.
Resource plan
Exline Labs assembles the right team for the project scope. A UX designer, one or more developers, and a QA engineer depending on the complexity. Tharsh is personally involved in every engagement from kickoff to delivery.
Length of engagement
A fixed timeline agreed before work begins, structured around sprint milestones. MVP builds typically run 6 to 8 weeks. UX engineering engagements run 8 to 10 weeks. Timelines are confirmed in the proposal.
Management
Exline Labs project lead manages sprint planning and client communication. You are updated at every sprint kickoff and sprint review. No day-to-day management overhead on your side.
Billing
Fixed price confirmed in the proposal. Paid in three milestones: a deposit at project start, a payment at design sign-off, and the final payment on delivery.
No black boxes.
No chasing for updates.
Clients are inside the project from day one, not waiting outside it. Communication happens on the channel that works best for you, not us. Here is what your visibility looks like throughout the project.
Jira
From day one, throughout the project. Full task board visibility. Every ticket, its status, its priority, and who owns it. No need to ask for a progress update.
Milanote
Discovery and design phases. UX research outputs, user journey maps, and validation findings. Organised for non-technical stakeholders.
Figma
Design sprints onwards. Live design workspace. Review, comment, and approve designs directly. No exports, no formal presentations.
Slack
Throughout the project. Direct access to the designer and developer working on your product. Not an account manager. Daily updates delivered here without prompting.
Email & WhatsApp
Whenever you prefer. If Slack is not your preferred channel, we work on the one that is. Communication happens where it is easiest for you.
At the end of every sprint you see working software, not a status update. If something changes during the build, you hear it from us before you notice it yourself.
How working with Exline Labs actually feels different.
01
Scope submission
The client shares a project scope or brief. This can be a detailed specification document or a high-level description of the problem to be solved. Exline Labs does not require a perfectly formed brief to begin the conversation.
02
Review and clarification
The Exline Labs team reviews the brief before responding. If anything is unclear, contradictory, or likely to cause problems during delivery, it is flagged before the first call. A clarification call may be requested to resolve open questions and align on scope before any proposal is prepared.
03
Scope approval
Once scope is sufficiently defined and both sides are aligned, the agreed scope is documented. This becomes the foundation of the proposal and the contract.
04
Proposal delivery
Exline Labs prepares and delivers a full proposal within five working days of scope approval. The proposal covers: project scope and functional specification, sprint plan and delivery timeline, and milestone-based pricing breakdown. The client reviews, raises questions, and negotiates if needed.
05
NDA and contract
Some clients request NDA execution prior to sharing sensitive product briefs. Exline Labs accommodates this. A contract is signed before any work begins, covering IP ownership, payment terms, milestone sign-off procedures, and termination conditions.
06
Project kickoff
With contract signed and first milestone payment received, the discovery sprint begins.
Why this process produces better products.
UX-first software engineering reduces rework.
UX-first software engineering means design decisions are made before engineering decisions. User journeys are validated before screens are designed. Screens are approved before code is written. This sequence exists for one reason: problems found during the design phase cost a fraction of what they cost to fix during the build phase. Every hour spent in wireframes and prototypes saves three to five hours in development.
Fixed deliverables at every phase prevent scope creep.
Every phase of the Exline Labs process ends with a defined set of deliverables that must be reviewed and approved before the next phase begins. This is not bureaucracy. It is the mechanism that prevents scope from drifting, priorities from shifting mid-sprint, and budgets from expanding without visibility. The client always knows exactly what was agreed, what was delivered, and what comes next.
Full visibility eliminates the most common cause of project failure.
The most common reason software projects fail is not technical. It is communication. A client who does not know what is happening cannot catch a problem before it compounds. Exline Labs solves this structurally. The tools, the sprint cadence, and the feedback loop are designed so that a client who wants to know the current state of the project at any moment can find out in thirty seconds without sending a message.
Ready to see this process applied to your project?
Tharsh Thangavadivel
Founder, Exline LabsBefore your discovery call, we research your project and come prepared with findings, not just questions.
Still have questions?
How long does a typical project take from first conversation to launch?
Discovery sprints typically run one to two weeks. Design sprints run two to four weeks depending on scope. Development sprints run in two-week cycles, with most builds completing between six and twelve weeks of development. We confirm the timeline in the proposal, structured as milestones with defined deliverables at each stage.
What happens after the product launches?
Many clients move to a dedicated developer or extended team on a monthly retainer after launch. The same people who built the product stay on it. No re-briefing, no new team member getting up to speed, no loss of context. If you need ongoing development, the transition is seamless.
How do I know what the team is working on day to day?
You have access to the Jira task board from day one. Every ticket is visible, with its status, priority, and owner. You also attend sprint kickoff briefings and sprint review sessions at the end of every sprint where working software is demonstrated. You are inside the project, not waiting for updates outside it.
What if my requirements change during the build?
Scope changes within a fixed project are handled at sprint boundaries. If you need something different from what was specified, we discuss it at the next sprint kickoff, assess the impact on timeline and budget, and agree on the adjustment before proceeding. Nothing changes without your approval.
Do you sign NDAs and what IP rights do I own?
We sign NDAs before any sensitive project discussion. On completion, all intellectual property — code, designs, assets, and documentation — transfers to you in full. We retain no rights to anything we build for your project.
Do you work with clients outside the UK?
Yes. Most of our clients are UK-based, but we work with founders and businesses across Europe and internationally. Discovery calls happen over video. Working hours are UK-based, with some flexibility for other time zones where needed.
How long does a typical project take from first conversation to launch?
Discovery sprints typically run one to two weeks. Design sprints run two to four weeks depending on scope. Development sprints run in two-week cycles, with most builds completing between six and twelve weeks of development. We confirm the timeline in the proposal, structured as milestones with defined deliverables at each stage.
How do I know what the team is working on day to day?
You have access to the Jira task board from day one. Every ticket is visible, with its status, priority, and owner. You also attend sprint kickoff briefings and sprint review sessions at the end of every sprint where working software is demonstrated. You are inside the project, not waiting for updates outside it.
Do you sign NDAs and what IP rights do I own?
We sign NDAs before any sensitive project discussion. On completion, all intellectual property — code, designs, assets, and documentation — transfers to you in full. We retain no rights to anything we build for your project.
What happens after the product launches?
Many clients move to a dedicated developer or extended team on a monthly retainer after launch. The same people who built the product stay on it. No re-briefing, no new team member getting up to speed, no loss of context. If you need ongoing development, the transition is seamless.
What if my requirements change during the build?
Scope changes within a fixed project are handled at sprint boundaries. If you need something different from what was specified, we discuss it at the next sprint kickoff, assess the impact on timeline and budget, and agree on the adjustment before proceeding. Nothing changes without your approval.
Do you work with clients outside the UK?
Yes. Most of our clients are UK-based, but we work with founders and businesses across Europe and internationally. Discovery calls happen over video. Working hours are UK-based, with some flexibility for other time zones where needed.